char = T;code = 84
char = e;code = 101
char = m;code = 109
char = p;code = 112
char = o;code = 111
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char = a;code = 97
char = l;code = 108
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char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = v;code = 118
char = e;code = 101
char = r;code = 114
char = t;code = 116
char = i;code = 105
char = c;code = 99
char = a;code = 97
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char = ;code = 32
char = s;code = 115
char = c;code = 99
char = a;code = 97
char = l;code = 108
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = o;code = 111
char = u;code = 117
char = s;code = 115
char = t;code = 116
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = f;code = 102
char = l;code = 108
char = u;code = 117
char = c;code = 99
char = t;code = 116
char = u;code = 117
char = a;code = 97
char = t;code = 116
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char = o;code = 111
char = n;code = 110
char = s;code = 115
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = 7;code = 55
char = 5;code = 53
char = -;code = 45
char = H;code = 72
char = z;code = 122
char = ,;code = 44
char = ;code = 32
char = b;code = 98
char = r;code = 114
char = o;code = 111
char = a;code = 97
char = d;code = 100
char = b;code = 98
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = n;code = 110
char = s;code = 115
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 = o;code = 111
char = ;code = 32
char = 8;code = 56
char = 7;code = 55
char = -;code = 45
char = k;code = 107
char = m;code = 109
char = ;code = 32
char = r;code = 114
char = a;code = 97
char = n;code = 110
char = g;code = 103
char = e;code = 101
char = ;code = 32
char = i;code = 105
char = n;code = 110
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 = s;code = 115
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = n;code = 110
char = ;code = 32
char = N;code = 78
char = o;code = 111
char = r;code = 114
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = P;code = 80
char = a;code = 97
char = c;code = 99
char = i;code = 105
char = f;code = 102
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = O;code = 79
char = c;code = 99
char = e;code = 101
char = a;code = 97
char = n;code = 110
char = .;code = 46
result sql = Temporal and vertical scales of acoustic fluctuations for 75-Hz, broadband transmissions to 87-km range in the eastern North Pacific Ocean.
Temporal and vertical scales of acoustic fluctuations for 75-Hz, broadband transmissions to 87-km range in the eastern North Pacific Ocean.
char = O;code = 79
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char = e;code = 101
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char = v;code = 118
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 = o;code = 111
char = f;code = 102
char = ;code = 32
char = s;code = 115
char = c;code = 99
char = a;code = 97
char = t;code = 116
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = l;code = 108
char = o;code = 111
char = w;code = 119
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char = f;code = 102
char = r;code = 114
char = e;code = 101
char = q;code = 113
char = u;code = 117
char = e;code = 101
char = n;code = 110
char = c;code = 99
char = y;code = 121
char = ;code = 32
char = s;code = 115
char = o;code = 111
char = u;code = 117
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = c;code = 99
char = e;code = 101
char = a;code = 97
char = n;code = 110
char = ;code = 32
char = h;code = 104
char = a;code = 97
char = v;code = 118
char = e;code = 101
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = c;code = 99
char = u;code = 117
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = l;code = 108
char = a;code = 97
char = r;code = 114
char = g;code = 103
char = e;code = 101
char = l;code = 108
char = y;code = 121
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char = o;code = 111
char = n;code = 110
char = ;code = 32
char = e;code = 101
char = f;code = 102
char = f;code = 102
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = l;code = 108
char = o;code = 111
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = r;code = 114
char = a;code = 97
char = n;code = 110
char = g;code = 103
char = e;code = 101
char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = v;code = 118
char = o;code = 111
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char = v;code = 118
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char = n;code = 110
char = g;code = 103
char = ;code = 32
char = m;code = 109
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char = l;code = 108
char = t;code = 116
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char = p;code = 112
char = l;code = 108
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = c;code = 99
char = a;code = 97
char = t;code = 116
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = n;code = 110
char = g;code = 103
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 = 46
char = ;code = 32
char = F;code = 70
char = l;code = 108
char = u;code = 117
char = c;code = 99
char = t;code = 116
char = u;code = 117
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 = 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 = o;code = 111
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char = e;code = 101
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = w;code = 119
char = o;code = 111
char = ;code = 32
char = s;code = 115
char = c;code = 99
char = a;code = 97
char = t;code = 116
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = e;code = 101
char = v;code = 118
char = e;code = 101
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char = t;code = 116
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = a;code = 97
char = l;code = 108
char = y;code = 121
char = z;code = 122
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = h;code = 104
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ,;code = 44
char = ;code = 32
char = u;code = 117
char = s;code = 115
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = 7;code = 55
char = 5;code = 53
char = -;code = 45
char = H;code = 72
char = z;code = 122
char = ;code = 32
char = b;code = 98
char = r;code = 114
char = o;code = 111
char = a;code = 97
char = d;code = 100
char = b;code = 98
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char = d;code = 100
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char = a;code = 97
char = l;code = 108
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char = t;code = 116
char = r;code = 114
char = a;code = 97
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char = s;code = 115
char = m;code = 109
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char = t;code = 116
char = e;code = 101
char = d;code = 100
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char = n;code = 110
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 = s;code = 115
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = n;code = 110
char = ;code = 32
char = N;code = 78
char = o;code = 111
char = r;code = 114
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = P;code = 80
char = a;code = 97
char = c;code = 99
char = i;code = 105
char = f;code = 102
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = O;code = 79
char = c;code = 99
char = e;code = 101
char = a;code = 97
char = n;code = 110
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = e;code = 101
char = x;code = 120
char = p;code = 112
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = m;code = 109
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = g;code = 103
char = e;code = 101
char = o;code = 111
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = r;code = 114
char = y;code = 121
char = ;code = 32
char = g;code = 103
char = i;code = 105
char = v;code = 118
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = t;code = 116
char = w;code = 119
char = o;code = 111
char = ;code = 32
char = p;code = 112
char = u;code = 117
char = r;code = 114
char = e;code = 101
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = f;code = 102
char = r;code = 114
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = r;code = 114
char = r;code = 114
char = i;code = 105
char = v;code = 118
char = a;code = 97
char = l;code = 108
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 = 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 = a;code = 97
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char = d;code = 100
char = ;code = 32
char = v;code = 118
char = e;code = 101
char = r;code = 114
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char = c;code = 99
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char = l;code = 108
char = ;code = 32
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char = c;code = 99
char = a;code = 97
char = l;code = 108
char = e;code = 101
char = s;code = 115
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char = o;code = 111
char = f;code = 102
char = ;code = 32
char = p;code = 112
char = h;code = 104
char = a;code = 97
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = a;code = 97
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char = d;code = 100
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = t;code = 116
char = e;code = 101
char = n;code = 110
char = s;code = 115
char = i;code = 105
char = t;code = 116
char = y;code = 121
char = ;code = 32
char = f;code = 102
char = l;code = 108
char = u;code = 117
char = c;code = 99
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char = u;code = 117
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char = t;code = 116
char = i;code = 105
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char = s;code = 115
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char = o;code = 111
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char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = t;code = 116
char = w;code = 119
char = o;code = 111
char = ;code = 32
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char = y;code = 121
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char = a;code = 97
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char = s;code = 115
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char = a;code = 97
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = c;code = 99
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char = m;code = 109
char = p;code = 112
char = a;code = 97
char = r;code = 114
char = e;code = 101
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 = p;code = 112
char = r;code = 114
char = e;code = 101
char = d;code = 100
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char = t;code = 116
char = i;code = 105
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char = b;code = 98
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char = e;code = 101
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char = ;code = 32
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char = h;code = 104
char = e;code = 101
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char = w;code = 119
char = e;code = 101
char = a;code = 97
char = k;code = 107
char = ;code = 32
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char = ;code = 32
char = M;code = 77
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char = k;code = 107
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char = a;code = 97
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char = s;code = 115
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char = e;code = 101
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char = u;code = 117
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char = [;code = 91
char = J;code = 74
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char = r;code = 114
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char = b;code = 98
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char = ;code = 32
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char = 8;code = 56
char = ;code = 32
char = (;code = 40
char = 1;code = 49
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char = 7;code = 55
char = 6;code = 54
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char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
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char = a;code = 97
char = t;code = 116
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char = c;code = 99
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char = u;code = 117
char = a;code = 97
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char = o;code = 111
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char = t;code = 116
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char = o;code = 111
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char = y;code = 121
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char = d;code = 100
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char = c;code = 99
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char = e;code = 101
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char = e;code = 101
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char = e;code = 101
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char = m;code = 109
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result sql = Observations of scattering of low-frequency sound in the ocean have focused largely on effects at long ranges, involving multiple scattering events. Fluctuations due to one and two scattering events are analyzed here, using 75-Hz broadband signals transmitted in the eastern North Pacific Ocean. The experimental geometry gives two purely refracted arrivals. The temporal and vertical scales of phase and intensity fluctuations for these two ray paths are compared with predictions based on the weak fluctuation theory of Munk and Zachariasen, which assumes internal-wave-induced sound-speed perturbations [J Acoust: Soc.

Am: 59, 818-838 (1976)]. The comparisons show that weak fluctuation theory describes the frequency and vertical-wave-number spectra of phase and intensity for the two paths reasonably well. The comparisons also show that a resonance condition exists between the local acoustic ray and the internal-wave field, as predicted by Munk and Zachariasen, such that only internal waves whose crests are parallel to the local ray path contribute to acoustic scattering. This effect leads to filtering of the acoustic spectra relative to the internal-wave spectra, such that steep rays do not acquire scattering contributions due to low-frequency internal waves.

Publication: J. Acoust. Soc. Am. 2009 Sep ;126(3)::1069-83. :doi: 10.1121/1.3177259.
Publication Date: 2009 Sep
Study Author(s): Colosi, John A;Xu, Jinshan;Worcester, Peter F;Dzieciuch, Matthew A;Howe, Bruce M;Mercer, James A;
Institution: Department of Oceanography, Naval Postgraduate School, Monterey, CA 93943, USA.
Shortcut link to this study:
Observations of scattering of low-frequency sound in the ocean have focused largely on effects at long ranges, involving multiple scattering events. Fluctuations due to one and two scattering events are analyzed here, using 75-Hz broadband signals transmitted in the eastern North Pacific Ocean. The experimental geometry gives two purely refracted arrivals. The temporal and vertical scales of phase and intensity fluctuations for these two ray paths are compared with predictions based on the weak fluctuation theory of Munk and Zachariasen, which assumes internal-wave-induced sound-speed perturbations [J Acoust: Soc.

Am: 59, 818-838 (1976)]. The comparisons show that weak fluctuation theory describes the frequency and vertical-wave-number spectra of phase and intensity for the two paths reasonably well. The comparisons also show that a resonance condition exists between the local acoustic ray and the internal-wave field, as predicted by Munk and Zachariasen, such that only internal waves whose crests are parallel to the local ray path contribute to acoustic scattering. This effect leads to filtering of the acoustic spectra relative to the internal-wave spectra, such that steep rays do not acquire scattering contributions due to low-frequency internal waves.
PMID: 19739719

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