char = C;code = 67 char = h;code = 104 char = a;code = 97 char = r;code = 114 char = a;code = 97 char = c;code = 99 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = i;code = 105 char = s;code = 115 char = t;code = 116 char = i;code = 105 char = c;code = 99 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = r;code = 114 char = a;code = 97 char = d;code = 100 char = i;code = 105 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = f;code = 102 char = i;code = 105 char = e;code = 101 char = l;code = 108 char = d;code = 100 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = l;code = 108 char = o;code = 111 char = w;code = 119 char = ;code = 32 char = E;code = 69 char = a;code = 97 char = r;code = 114 char = t;code = 116 char = h;code = 104 char = ;code = 32 char = o;code = 111 char = r;code = 114 char = b;code = 98 char = i;code = 105 char = t;code = 116 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = d;code = 100 char = e;code = 101 char = e;code = 101 char = p;code = 112 char = ;code = 32 char = s;code = 115 char = p;code = 112 char = a;code = 97 char = c;code = 99 char = e;code = 101 char = .;code = 46 result sql = Characteristic of the radiation field in low Earth orbit and in deep space.
Characteristic of the radiation field in low Earth orbit and in deep space.char = T;code = 84 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = r;code = 114 char = a;code = 97 char = d;code = 100 char = i;code = 105 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = e;code = 101 char = x;code = 120 char = p;code = 112 char = o;code = 111 char = s;code = 115 char = u;code = 117 char = r;code = 114 char = e;code = 101 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = s;code = 115 char = p;code = 112 char = a;code = 97 char = c;code = 99 char = e;code = 101 char = ;code = 32 char = b;code = 98 char = y;code = 121 char = ;code = 32 char = c;code = 99 char = o;code = 111 char = s;code = 115 char = m;code = 109 char = i;code = 105 char = c;code = 99 char = ;code = 32 char = r;code = 114 char = a;code = 97 char = d;code = 100 char = i;code = 105 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = c;code = 99 char = a;code = 97 char = n;code = 110 char = ;code = 32 char = b;code = 98 char = e;code = 101 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = d;code = 100 char = u;code = 117 char = c;code = 99 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = r;code = 114 char = o;code = 111 char = u;code = 117 char = g;code = 103 char = h;code = 104 char = ;code = 32 char = c;code = 99 char = a;code = 97 char = r;code = 114 char = e;code = 101 char = f;code = 102 char = u;code = 117 char = l;code = 108 char = ;code = 32 char = m;code = 109 char = i;code = 105 char = s;code = 115 char = s;code = 115 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = p;code = 112 char = l;code = 108 char = a;code = 97 char = n;code = 110 char = n;code = 110 char = i;code = 105 char = n;code = 110 char = g;code = 103 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = c;code = 99 char = o;code = 111 char = n;code = 110 char = s;code = 115 char = t;code = 116 char = r;code = 114 char = u;code = 117 char = c;code = 99 char = t;code = 116 char = i;code = 105 char = v;code = 118 char = e;code = 101 char = ;code = 32 char = m;code = 109 char = e;code = 101 char = a;code = 97 char = s;code = 115 char = u;code = 117 char = r;code = 114 char = e;code = 101 char = s;code = 115 char = ;code = 32 char = a;code = 97 char = s;code = 115 char = ;code = 32 char = e;code = 101 char = x;code = 120 char = a;code = 97 char = m;code = 109 char = p;code = 112 char = l;code = 108 char = e;code = 101 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = p;code = 112 char = r;code = 114 char = o;code = 111 char = v;code = 118 char = i;code = 105 char = s;code = 115 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = a;code = 97 char = ;code = 32 char = r;code = 114 char = a;code = 97 char = d;code = 100 char = i;code = 105 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = s;code = 115 char = h;code = 104 char = e;code = 101 char = l;code = 108 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = ,;code = 44 char = ;code = 32 char = b;code = 98 char = u;code = 117 char = t;code = 116 char = ;code = 32 char = i;code = 105 char = t;code = 116 char = ;code = 32 char = c;code = 99 char = a;code = 97 char = n;code = 110 char = n;code = 110 char = o;code = 111 char = t;code = 116 char = ;code = 32 char = b;code = 98 char = e;code = 101 char = ;code = 32 char = c;code = 99 char = o;code = 111 char = m;code = 109 char = p;code = 112 char = l;code = 108 char = e;code = 101 char = t;code = 116 char = e;code = 101 char = l;code = 108 char = y;code = 121 char = ;code = 32 char = a;code = 97 char = v;code = 118 char = o;code = 111 char = i;code = 105 char = d;code = 100 char = e;code = 101 char = d;code = 100 char = .;code = 46 char = ;code = 32 char = T;code = 84 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = a;code = 97 char = s;code = 115 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = f;code = 102 char = o;code = 111 char = r;code = 114 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = a;code = 97 char = t;code = 116 char = ;code = 32 char = a;code = 97 char = r;code = 114 char = e;code = 101 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = e;code = 101 char = x;code = 120 char = t;code = 116 char = r;code = 114 char = e;code = 101 char = m;code = 109 char = e;code = 101 char = ;code = 32 char = h;code = 104 char = i;code = 105 char = g;code = 103 char = h;code = 104 char = ;code = 32 char = e;code = 101 char = n;code = 110 char = e;code = 101 char = r;code = 114 char = g;code = 103 char = i;code = 105 char = e;code = 101 char = s;code = 115 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = p;code = 112 char = a;code = 97 char = r;code = 114 char = t;code = 116 char = i;code = 105 char = c;code = 99 char = l;code = 108 char = e;code = 101 char = s;code = 115 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = i;code = 105 char = s;code = 115 char = ;code = 32 char = f;code = 102 char = i;code = 105 char = e;code = 101 char = l;code = 108 char = d;code = 100 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = h;code = 104 char = e;code = 101 char = r;code = 114 char = e;code = 101 char = w;code = 119 char = i;code = 105 char = t;code = 116 char = h;code = 104 char = ;code = 32 char = c;code = 99 char = o;code = 111 char = n;code = 110 char = n;code = 110 char = e;code = 101 char = c;code = 99 char = t;code = 116 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = h;code = 104 char = i;code = 105 char = g;code = 103 char = h;code = 104 char = ;code = 32 char = p;code = 112 char = e;code = 101 char = n;code = 110 char = e;code = 101 char = t;code = 116 char = r;code = 114 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = d;code = 100 char = e;code = 101 char = p;code = 112 char = t;code = 116 char = h;code = 104 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = m;code = 109 char = a;code = 97 char = t;code = 116 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = .;code = 46 char = ;code = 32 char = F;code = 70 char = o;code = 111 char = r;code = 114 char = ;code = 32 char = m;code = 109 char = i;code = 105 char = s;code = 115 char = s;code = 115 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = s;code = 115 char = ;code = 32 char = o;code = 111 char = u;code = 117 char = t;code = 116 char = s;code = 115 char = i;code = 105 char = d;code = 100 char = e;code = 101 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = m;code = 109 char = a;code = 97 char = g;code = 103 char = n;code = 110 char = e;code = 101 char = t;code = 116 char = o;code = 111 char = s;code = 115 char = p;code = 112 char = h;code = 104 char = e;code = 101 char = r;code = 114 char = e;code = 101 char = ;code = 32 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = i;code = 105 char = z;code = 122 char = i;code = 105 char = n;code = 110 char = g;code = 103 char = ;code = 32 char = r;code = 114 char = a;code = 97 char = d;code = 100 char = i;code = 105 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = i;code = 105 char = s;code = 115 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = c;code = 99 char = o;code = 111 char = g;code = 103 char = n;code = 110 char = i;code = 105 char = z;code = 122 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = a;code = 97 char = s;code = 115 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = k;code = 107 char = e;code = 101 char = y;code = 121 char = ;code = 32 char = f;code = 102 char = a;code = 97 char = c;code = 99 char = t;code = 116 char = o;code = 111 char = r;code = 114 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = r;code = 114 char = o;code = 111 char = u;code = 117 char = g;code = 103 char = h;code = 104 char = ;code = 32 char = i;code = 105 char = t;code = 116 char = s;code = 115 char = ;code = 32 char = i;code = 105 char = m;code = 109 char = p;code = 112 char = a;code = 97 char = c;code = 99 char = t;code = 116 char = ;code = 32 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = c;code = 99 char = r;code = 114 char = e;code = 101 char = w;code = 119 char = ;code = 32 char = h;code = 104 char = e;code = 101 char = a;code = 97 char = l;code = 108 char = t;code = 116 char = h;code = 104 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = p;code = 112 char = e;code = 101 char = r;code = 114 char = f;code = 102 char = o;code = 111 char = r;code = 114 char = m;code = 109 char = a;code = 97 char = n;code = 110 char = c;code = 99 char = e;code = 101 char = .;code = 46 char = ;code = 32 char = I;code = 73 char = n;code = 110 char = ;code = 32 char = a;code = 97 char = b;code = 98 char = s;code = 115 char = e;code = 101 char = n;code = 110 char = c;code = 99 char = e;code = 101 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = s;code = 115 char = p;code = 112 char = o;code = 111 char = r;code = 114 char = a;code = 97 char = d;code = 100 char = i;code = 105 char = c;code = 99 char = ;code = 32 char = s;code = 115 char = o;code = 111 char = l;code = 108 char = a;code = 97 char = r;code = 114 char = ;code = 32 char = p;code = 112 char = a;code = 97 char = r;code = 114 char = t;code = 116 char = i;code = 105 char = c;code = 99 char = l;code = 108 char = e;code = 101 char = ;code = 32 char = e;code = 101 char = v;code = 118 char = e;code = 101 char = n;code = 110 char = t;code = 116 char = s;code = 115 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = r;code = 114 char = a;code = 97 char = d;code = 100 char = i;code = 105 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = e;code = 101 char = x;code = 120 char = p;code = 112 char = o;code = 111 char = s;code = 115 char = u;code = 117 char = r;code = 114 char = e;code = 101 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = L;code = 76 char = o;code = 111 char = w;code = 119 char = ;code = 32 char = E;code = 69 char = a;code = 97 char = r;code = 114 char = t;code = 116 char = h;code = 104 char = ;code = 32 char = o;code = 111 char = r;code = 114 char = b;code = 98 char = i;code = 105 char = t;code = 116 char = ;code = 32 char = (;code = 40 char = L;code = 76 char = E;code = 69 char = O;code = 79 char = );code = 41 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = s;code = 115 char = i;code = 105 char = d;code = 100 char = e;code = 101 char = ;code = 32 char = S;code = 83 char = p;code = 112 char = a;code = 97 char = c;code = 99 char = e;code = 101 char = c;code = 99 char = r;code = 114 char = a;code = 97 char = f;code = 102 char = t;code = 116 char = ;code = 32 char = i;code = 105 char = s;code = 115 char = ;code = 32 char = d;code = 100 char = e;code = 101 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = m;code = 109 char = i;code = 105 char = n;code = 110 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = b;code = 98 char = y;code = 121 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = g;code = 103 char = a;code = 97 char = l;code = 108 char = a;code = 97 char = c;code = 99 char = t;code = 116 char = i;code = 105 char = c;code = 99 char = ;code = 32 char = c;code = 99 char = o;code = 111 char = s;code = 115 char = m;code = 109 char = i;code = 105 char = c;code = 99 char = ;code = 32 char = r;code = 114 char = a;code = 97 char = d;code = 100 char = i;code = 105 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = (;code = 40 char = p;code = 112 char = r;code = 114 char = o;code = 111 char = t;code = 116 char = o;code = 111 char = n;code = 110 char = s;code = 115 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = h;code = 104 char = e;code = 101 char = a;code = 97 char = v;code = 118 char = i;code = 105 char = e;code = 101 char = r;code = 114 char = ;code = 32 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = s;code = 115 char = );code = 41 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = b;code = 98 char = y;code = 121 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = p;code = 112 char = r;code = 114 char = o;code = 111 char = t;code = 116 char = o;code = 111 char = n;code = 110 char = s;code = 115 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = s;code = 115 char = i;code = 105 char = d;code = 100 char = e;code = 101 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = S;code = 83 char = o;code = 111 char = u;code = 117 char = t;code = 116 char = h;code = 104 char = ;code = 32 char = A;code = 65 char = t;code = 116 char = l;code = 108 char = a;code = 97 char = n;code = 110 char = t;code = 116 char = i;code = 105 char = c;code = 99 char = ;code = 32 char = A;code = 65 char = n;code = 110 char = o;code = 111 char = m;code = 109 char = a;code = 97 char = l;code = 108 char = y;code = 121 char = ;code = 32 char = (;code = 40 char = S;code = 83 char = A;code = 65 char = A;code = 65 char = );code = 41 char = ,;code = 44 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = ;code = 32 char = a;code = 97 char = r;code = 114 char = e;code = 101 char = a;code = 97 char = ;code = 32 char = w;code = 119 char = h;code = 104 char = e;code = 101 char = r;code = 114 char = e;code = 101 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = r;code = 114 char = a;code = 97 char = d;code = 100 char = i;code = 105 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = b;code = 98 char = e;code = 101 char = l;code = 108 char = t;code = 116 char = ;code = 32 char = c;code = 99 char = o;code = 111 char = m;code = 109 char = e;code = 101 char = s;code = 115 char = ;code = 32 char = c;code = 99 char = l;code = 108 char = o;code = 111 char = s;code = 115 char = e;code = 101 char = r;code = 114 char = ;code = 32 char = t;code = 116 char = o;code = 111 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = e;code = 101 char = a;code = 97 char = r;code = 114 char = t;code = 116 char = h;code = 104 char = ;code = 32 char = s;code = 115 char = u;code = 117 char = r;code = 114 char = f;code = 102 char = a;code = 97 char = c;code = 99 char = e;code = 101 char = ;code = 32 char = d;code = 100 char = u;code = 117 char = e;code = 101 char = ;code = 32 char = t;code = 116 char = o;code = 111 char = ;code = 32 char = a;code = 97 char = ;code = 32 char = d;code = 100 char = i;code = 105 char = s;code = 115 char = p;code = 112 char = l;code = 108 char = a;code = 97 char = c;code = 99 char = e;code = 101 char = m;code = 109 char = e;code = 101 char = n;code = 110 char = t;code = 116 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = m;code = 109 char = a;code = 97 char = g;code = 103 char = n;code = 110 char = e;code = 101 char = t;code = 116 char = i;code = 105 char = c;code = 99 char = ;code = 32 char = d;code = 100 char = i;code = 105 char = p;code = 112 char = o;code = 111 char = l;code = 108 char = e;code = 101 char = ;code = 32 char = a;code = 97 char = x;code = 120 char = e;code = 101 char = s;code = 115 char = ;code = 32 char = f;code = 102 char = r;code = 114 char = o;code = 111 char = m;code = 109 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = E;code = 69 char = a;code = 97 char = r;code = 114 char = t;code = 116 char = h;code = 104 char = ';code = 39 char = s;code = 115 char = ;code = 32 char = c;code = 99 char = e;code = 101 char = n;code = 110 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = .;code = 46 char = ;code = 32 char = I;code = 73 char = n;code = 110 char = ;code = 32 char = a;code = 97 char = d;code = 100 char = d;code = 100 char = i;code = 105 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = r;code = 114 char = e;code = 101 char = ;code = 32 char = i;code = 105 char = s;code = 115 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = ;code = 32 char = a;code = 97 char = l;code = 108 char = b;code = 98 char = e;code = 101 char = d;code = 100 char = o;code = 111 char = ;code = 32 char = s;code = 115 char = o;code = 111 char = u;code = 117 char = r;code = 114 char = c;code = 99 char = e;code = 101 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = n;code = 110 char = e;code = 101 char = u;code = 117 char = t;code = 116 char = r;code = 114 char = o;code = 111 char = n;code = 110 char = s;code = 115 char = ;code = 32 char = p;code = 112 char = r;code = 114 char = o;code = 111 char = d;code = 100 char = u;code = 117 char = c;code = 99 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = a;code = 97 char = s;code = 115 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = a;code = 97 char = c;code = 99 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = p;code = 112 char = r;code = 114 char = o;code = 111 char = d;code = 100 char = u;code = 117 char = c;code = 99 char = t;code = 116 char = s;code = 115 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = p;code = 112 char = r;code = 114 char = i;code = 105 char = m;code = 109 char = a;code = 97 char = r;code = 114 char = y;code = 121 char = ;code = 32 char = g;code = 103 char = a;code = 97 char = l;code = 108 char = a;code = 97 char = c;code = 99 char = t;code = 116 char = i;code = 105 char = c;code = 99 char = ;code = 32 char = p;code = 112 char = a;code = 97 char = r;code = 114 char = t;code = 116 char = i;code = 105 char = c;code = 99 char = l;code = 108 char = e;code = 101 char = s;code = 115 char = ;code = 32 char = w;code = 119 char = i;code = 105 char = t;code = 116 char = h;code = 104 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = a;code = 97 char = t;code = 116 char = o;code = 111 char = m;code = 109 char = s;code = 115 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = e;code = 101 char = a;code = 97 char = r;code = 114 char = t;code = 116 char = h;code = 104 char = ;code = 32 char = a;code = 97 char = t;code = 116 char = m;code = 109 char = o;code = 111 char = s;code = 115 char = p;code = 112 char = h;code = 104 char = e;code = 101 char = r;code = 114 char = e;code = 101 char = .;code = 46 char = ;code = 32 char = O;code = 79 char = u;code = 117 char = t;code = 116 char = s;code = 115 char = i;code = 105 char = d;code = 100 char = e;code = 101 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = s;code = 115 char = p;code = 112 char = a;code = 97 char = c;code = 99 char = e;code = 101 char = c;code = 99 char = r;code = 114 char = a;code = 97 char = f;code = 102 char = t;code = 116 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = d;code = 100 char = o;code = 111 char = s;code = 115 char = e;code = 101 char = ;code = 32 char = i;code = 105 char = s;code = 115 char = ;code = 32 char = d;code = 100 char = o;code = 111 char = m;code = 109 char = i;code = 105 char = n;code = 110 char = a;code = 97 char = t;code = 116 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = b;code = 98 char = y;code = 121 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = e;code = 101 char = l;code = 108 char = e;code = 101 char = c;code = 99 char = t;code = 116 char = r;code = 114 char = o;code = 111 char = n;code = 110 char = s;code = 115 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = h;code = 104 char = o;code = 111 char = r;code = 114 char = n;code = 110 char = s;code = 115 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = r;code = 114 char = a;code = 97 char = d;code = 100 char = i;code = 105 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = b;code = 98 char = e;code = 101 char = l;code = 108 char = t;code = 116 char = ;code = 32 char = l;code = 108 char = o;code = 111 char = c;code = 99 char = a;code = 97 char = t;code = 116 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = a;code = 97 char = t;code = 116 char = ;code = 32 char = a;code = 97 char = b;code = 98 char = o;code = 111 char = u;code = 117 char = t;code = 116 char = ;code = 32 char = 6;code = 54 char = 0;code = 48 char = ";code = 34 char = ;code = 32 char = l;code = 108 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = t;code = 116 char = u;code = 117 char = d;code = 100 char = e;code = 101 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = P;code = 80 char = o;code = 111 char = l;code = 108 char = a;code = 97 char = r;code = 114 char = ;code = 32 char = R;code = 82 char = e;code = 101 char = g;code = 103 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = s;code = 115 char = .;code = 46 char = ;code = 32 char = T;code = 84 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = r;code = 114 char = a;code = 97 char = d;code = 100 char = i;code = 105 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = f;code = 102 char = i;code = 105 char = e;code = 101 char = l;code = 108 char = d;code = 100 char = ;code = 32 char = h;code = 104 char = a;code = 97 char = s;code = 115 char = ;code = 32 char = s;code = 115 char = p;code = 112 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = a;code = 97 char = l;code = 108 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = t;code = 116 char = e;code = 101 char = m;code = 109 char = p;code = 112 char = o;code = 111 char = r;code = 114 char = a;code = 97 char = l;code = 108 char = ;code = 32 char = v;code = 118 char = a;code = 97 char = r;code = 114 char = i;code = 105 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = s;code = 115 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = d;code = 100 char = e;code = 101 char = p;code = 112 char = e;code = 101 char = n;code = 110 char = d;code = 100 char = e;code = 101 char = n;code = 110 char = c;code = 99 char = e;code = 101 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = E;code = 69 char = a;code = 97 char = r;code = 114 char = t;code = 116 char = h;code = 104 char = ;code = 32 char = m;code = 109 char = a;code = 97 char = g;code = 103 char = n;code = 110 char = e;code = 101 char = t;code = 116 char = i;code = 105 char = c;code = 99 char = ;code = 32 char = f;code = 102 char = i;code = 105 char = e;code = 101 char = l;code = 108 char = d;code = 100 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = s;code = 115 char = o;code = 111 char = l;code = 108 char = a;code = 97 char = r;code = 114 char = ;code = 32 char = c;code = 99 char = y;code = 121 char = c;code = 99 char = l;code = 108 char = e;code = 101 char = .;code = 46 char = ;code = 32 char = T;code = 84 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = c;code = 99 char = o;code = 111 char = m;code = 109 char = p;code = 112 char = l;code = 108 char = e;code = 101 char = x;code = 120 char = i;code = 105 char = t;code = 116 char = y;code = 121 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = r;code = 114 char = a;code = 97 char = d;code = 100 char = i;code = 105 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = f;code = 102 char = i;code = 105 char = e;code = 101 char = l;code = 108 char = d;code = 100 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = s;code = 115 char = i;code = 105 char = d;code = 100 char = e;code = 101 char = ;code = 32 char = a;code = 97 char = ;code = 32 char = s;code = 115 char = p;code = 112 char = a;code = 97 char = c;code = 99 char = e;code = 101 char = c;code = 99 char = r;code = 114 char = a;code = 97 char = f;code = 102 char = t;code = 116 char = ;code = 32 char = i;code = 105 char = s;code = 115 char = ;code = 32 char = f;code = 102 char = u;code = 117 char = r;code = 114 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = r;code = 114 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = c;code = 99 char = r;code = 114 char = e;code = 101 char = a;code = 97 char = s;code = 115 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = r;code = 114 char = o;code = 111 char = u;code = 117 char = g;code = 103 char = h;code = 104 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = a;code = 97 char = c;code = 99 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = h;code = 104 char = i;code = 105 char = g;code = 103 char = h;code = 104 char = ;code = 32 char = e;code = 101 char = n;code = 110 char = e;code = 101 char = r;code = 114 char = g;code = 103 char = y;code = 121 char = ;code = 32 char = c;code = 99 char = o;code = 111 char = m;code = 109 char = p;code = 112 char = o;code = 111 char = n;code = 110 char = e;code = 101 char = n;code = 110 char = t;code = 116 char = s;code = 115 char = ;code = 32 char = w;code = 119 char = i;code = 105 char = t;code = 116 char = h;code = 104 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = s;code = 115 char = p;code = 112 char = a;code = 97 char = c;code = 99 char = e;code = 101 char = c;code = 99 char = r;code = 114 char = a;code = 97 char = f;code = 102 char = t;code = 116 char = ;code = 32 char = s;code = 115 char = h;code = 104 char = i;code = 105 char = e;code = 101 char = l;code = 108 char = d;code = 100 char = i;code = 105 char = n;code = 110 char = g;code = 103 char = ;code = 32 char = m;code = 109 char = a;code = 97 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = i;code = 105 char = a;code = 97 char = l;code = 108 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = w;code = 119 char = i;code = 105 char = t;code = 116 char = h;code = 104 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = b;code = 98 char = o;code = 111 char = d;code = 100 char = y;code = 121 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = a;code = 97 char = s;code = 115 char = t;code = 116 char = r;code = 114 char = o;code = 111 char = n;code = 110 char = a;code = 97 char = u;code = 117 char = t;code = 116 char = s;code = 115 char = .;code = 46 char = ;code = 32 char = I;code = 73 char = n;code = 110 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = p;code = 112 char = l;code = 108 char = a;code = 97 char = n;code = 110 char = e;code = 101 char = t;code = 116 char = a;code = 97 char = r;code = 114 char = y;code = 121 char = ;code = 32 char = m;code = 109 char = i;code = 105 char = s;code = 115 char = s;code = 115 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = s;code = 115 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = r;code = 114 char = a;code = 97 char = d;code = 100 char = i;code = 105 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = b;code = 98 char = e;code = 101 char = l;code = 108 char = t;code = 116 char = ;code = 32 char = w;code = 119 char = i;code = 105 char = l;code = 108 char = l;code = 108 char = ;code = 32 char = b;code = 98 char = e;code = 101 char = ;code = 32 char = c;code = 99 char = r;code = 114 char = o;code = 111 char = s;code = 115 char = s;code = 115 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = a;code = 97 char = ;code = 32 char = c;code = 99 char = o;code = 111 char = u;code = 117 char = p;code = 112 char = l;code = 108 char = e;code = 101 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = m;code = 109 char = i;code = 105 char = n;code = 110 char = u;code = 117 char = t;code = 116 char = e;code = 101 char = s;code = 115 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = r;code = 114 char = e;code = 101 char = f;code = 102 char = o;code = 111 char = r;code = 114 char = e;code = 101 char = ;code = 32 char = i;code = 105 char = t;code = 116 char = s;code = 115 char = ;code = 32 char = c;code = 99 char = o;code = 111 char = n;code = 110 char = t;code = 116 char = r;code = 114 char = i;code = 105 char = b;code = 98 char = u;code = 117 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = t;code = 116 char = o;code = 111 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = i;code = 105 char = r;code = 114 char = ;code = 32 char = r;code = 114 char = a;code = 97 char = d;code = 100 char = i;code = 105 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = e;code = 101 char = x;code = 120 char = p;code = 112 char = o;code = 111 char = s;code = 115 char = u;code = 117 char = r;code = 114 char = e;code = 101 char = ;code = 32 char = i;code = 105 char = s;code = 115 char = ;code = 32 char = q;code = 113 char = u;code = 117 char = i;code = 105 char = t;code = 116 char = e;code = 101 char = ;code = 32 char = s;code = 115 char = m;code = 109 char = a;code = 97 char = l;code = 108 char = l;code = 108 char = ,;code = 44 char = ;code = 32 char = b;code = 98 char = u;code = 117 char = t;code = 116 char = ;code = 32 char = s;code = 115 char = u;code = 117 char = b;code = 98 char = s;code = 115 char = e;code = 101 char = q;code = 113 char = u;code = 117 char = e;code = 101 char = n;code = 110 char = t;code = 116 char = l;code = 108 char = y;code = 121 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = p;code = 112 char = r;code = 114 char = o;code = 111 char = t;code = 116 char = e;code = 101 char = c;code = 99 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = b;code = 98 char = y;code = 121 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = E;code = 69 char = a;code = 97 char = r;code = 114 char = t;code = 116 char = h;code = 104 char = ;code = 32 char = m;code = 109 char = a;code = 97 char = g;code = 103 char = n;code = 110 char = e;code = 101 char = t;code = 116 char = i;code = 105 char = c;code = 99 char = ;code = 32 char = f;code = 102 char = i;code = 105 char = e;code = 101 char = l;code = 108 char = d;code = 100 char = ;code = 32 char = i;code = 105 char = s;code = 115 char = ;code = 32 char = l;code = 108 char = o;code = 111 char = s;code = 115 char = t;code = 116 char = ,;code = 44 char = ;code = 32 char = l;code = 108 char = e;code = 101 char = a;code = 97 char = v;code = 118 char = i;code = 105 char = n;code = 110 char = g;code = 103 char = ;code = 32 char = o;code = 111 char = n;code = 110 char = l;code = 108 char = y;code = 121 char = ;code = 32 char = s;code = 115 char = h;code = 104 char = i;code = 105 char = e;code = 101 char = l;code = 108 char = d;code = 100 char = i;code = 105 char = n;code = 110 char = g;code = 103 char = ;code = 32 char = m;code = 109 char = e;code = 101 char = a;code = 97 char = s;code = 115 char = u;code = 117 char = r;code = 114 char = e;code = 101 char = s;code = 115 char = ;code = 32 char = a;code = 97 char = s;code = 115 char = ;code = 32 char = e;code = 101 char = x;code = 120 char = p;code = 112 char = o;code = 111 char = s;code = 115 char = u;code = 117 char = r;code = 114 char = e;code = 101 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = d;code = 100 char = u;code = 117 char = c;code = 99 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = m;code = 109 char = e;code = 101 char = a;code = 97 char = n;code = 110 char = s;code = 115 char = .;code = 46 char = ;code = 32 char = T;code = 84 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = p;code = 112 char = o;code = 111 char = r;code = 114 char = t;code = 116 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = t;code = 116 char = e;code = 101 char = n;code = 110 char = d;code = 100 char = s;code = 115 char = ;code = 32 char = t;code = 116 char = o;code = 111 char = ;code = 32 char = d;code = 100 char = e;code = 101 char = s;code = 115 char = c;code = 99 char = r;code = 114 char = i;code = 105 char = b;code = 98 char = e;code = 101 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = r;code = 114 char = a;code = 97 char = d;code = 100 char = i;code = 105 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = f;code = 102 char = i;code = 105 char = e;code = 101 char = l;code = 108 char = d;code = 100 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = s;code = 115 char = p;code = 112 char = a;code = 97 char = c;code = 99 char = e;code = 101 char = ,;code = 44 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = a;code = 97 char = c;code = 99 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = p;code = 112 char = a;code = 97 char = r;code = 114 char = t;code = 116 char = i;code = 105 char = c;code = 99 char = l;code = 108 char = e;code = 101 char = s;code = 115 char = ;code = 32 char = w;code = 119 char = i;code = 105 char = t;code = 116 char = h;code = 104 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = m;code = 109 char = a;code = 97 char = g;code = 103 char = n;code = 110 char = e;code = 101 char = t;code = 116 char = i;code = 105 char = c;code = 99 char = ;code = 32 char = f;code = 102 char = i;code = 105 char = e;code = 101 char = l;code = 108 char = d;code = 100 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = s;code = 115 char = h;code = 104 char = i;code = 105 char = e;code = 101 char = l;code = 108 char = d;code = 100 char = i;code = 105 char = n;code = 110 char = g;code = 103 char = ;code = 32 char = m;code = 109 char = a;code = 97 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = i;code = 105 char = a;code = 97 char = l;code = 108 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = g;code = 103 char = i;code = 105 char = v;code = 118 char = e;code = 101 char = ;code = 32 char = s;code = 115 char = o;code = 111 char = m;code = 109 char = e;code = 101 char = ;code = 32 char = n;code = 110 char = u;code = 117 char = m;code = 109 char = b;code = 98 char = e;code = 101 char = r;code = 114 char = s;code = 115 char = ;code = 32 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = r;code = 114 char = a;code = 97 char = d;code = 100 char = i;code = 105 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = e;code = 101 char = x;code = 120 char = p;code = 112 char = o;code = 111 char = s;code = 115 char = u;code = 117 char = r;code = 114 char = e;code = 101 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = l;code = 108 char = o;code = 111 char = w;code = 119 char = ;code = 32 char = e;code = 101 char = a;code = 97 char = r;code = 114 char = t;code = 116 char = h;code = 104 char = ;code = 32 char = o;code = 111 char = r;code = 114 char = b;code = 98 char = i;code = 105 char = t;code = 116 char = s;code = 115 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = p;code = 112 char = l;code = 108 char = a;code = 97 char = n;code = 110 char = e;code = 101 char = t;code = 116 char = a;code = 97 char = r;code = 114 char = y;code = 121 char = ;code = 32 char = m;code = 109 char = i;code = 105 char = s;code = 115 char = s;code = 115 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = s;code = 115 char = .;code = 46 char = <;code = 60 char = b;code = 98 char = r;code = 114 char = /;code = 47 char = >;code = 62 result sql = The radiation exposure in space by cosmic radiation can be reduced through careful mission planning and constructive measures as example the provision of a radiation shelter, but it cannot be completely avoided. The reason for that are the extreme high energies of particles in this field and the herewith connected high penetration depth in matter. For missions outside the magnetosphere ionizing radiation is recognized as the key factor through its impact on crew health and performance. In absence of sporadic solar particle events the radiation exposure in Low Earth orbit (LEO) inside Spacecraft is determined by the galactic cosmic radiation (protons and heavier ions) and by the protons inside the South Atlantic Anomaly (SAA), an area where the radiation belt comes closer to the earth surface due to a displacement of the magnetic dipole axes from the Earth's center. In addition there is an albedo source of neutrons produced as interaction products of the primary galactic particles with the atoms of the earth atmosphere. Outside the spacecraft the dose is dominated by the electrons of the horns of the radiation belt located at about 60" latitude in Polar Regions. The radiation field has spatial and temporal variations in dependence of the Earth magnetic field and the solar cycle. The complexity of the radiation field inside a spacecraft is further increased through the interaction of the high energy components with the spacecraft shielding material and with the body of the astronauts. In interplanetary missions the radiation belt will be crossed in a couple of minutes and therefore its contribution to their radiation exposure is quite small, but subsequently the protection by the Earth magnetic field is lost, leaving only shielding measures as exposure reduction means. The report intends to describe the radiation field in space, the interaction of the particles with the magnetic field and shielding material and give some numbers on the radiation exposure in low earth orbits and in interplanetary missions.
Publication: Z Med Phys 2008 ;18(4)::233-43.
Publication Date: 2008
Study Author(s): Reitz, Guenther;
Institution: German Aerospace Center-DLR, Institute of Aerospace Medicine, Radiation Biology, Köln, Germany.
[email protected]
Shortcut link to this study:
The radiation exposure in space by cosmic radiation can be reduced through careful mission planning and constructive measures as example the provision of a radiation shelter, but it cannot be completely avoided. The reason for that are the extreme high energies of particles in this field and the herewith connected high penetration depth in matter. For missions outside the magnetosphere ionizing radiation is recognized as the key factor through its impact on crew health and performance. In absence of sporadic solar particle events the radiation exposure in Low Earth orbit (LEO) inside Spacecraft is determined by the galactic cosmic radiation (protons and heavier ions) and by the protons inside the South Atlantic Anomaly (SAA), an area where the radiation belt comes closer to the earth surface due to a displacement of the magnetic dipole axes from the Earth's center. In addition there is an albedo source of neutrons produced as interaction products of the primary galactic particles with the atoms of the earth atmosphere. Outside the spacecraft the dose is dominated by the electrons of the horns of the radiation belt located at about 60" latitude in Polar Regions. The radiation field has spatial and temporal variations in dependence of the Earth magnetic field and the solar cycle. The complexity of the radiation field inside a spacecraft is further increased through the interaction of the high energy components with the spacecraft shielding material and with the body of the astronauts. In interplanetary missions the radiation belt will be crossed in a couple of minutes and therefore its contribution to their radiation exposure is quite small, but subsequently the protection by the Earth magnetic field is lost, leaving only shielding measures as exposure reduction means. The report intends to describe the radiation field in space, the interaction of the particles with the magnetic field and shielding material and give some numbers on the radiation exposure in low earth orbits and in interplanetary missions.
PMID: 19205293