% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 64 91 102 41 77 64 3 4 107 56 109 124 284 498 445 657 627 700 1290 809 398 495 311 445 552 497 592 430 457 256 275 423 268 308 255 250 349 188 223 161 226 218 145 170 179 122 159 101 107 83 120 75 82 87 92 129 72 68 119 102 63 95 78 77 62 52 30 10 71 20 58 15 76 20 43 45 39 26 56 16 17 -30 -40 -13 37 39 -23 12 -11 13 -20 21 28 -19 18 32 27 -18 -18 -32 -32 -27 -15 48 21 -34 17 -31 42 17 -10 40 23 -20 43 -26 -12 17 15 24 14 -16 -21 45 -41 -44 32 -29