% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 196 247 240 203 155 144 88 87 111 101 292 502 1772 1549 1438 1251 889 690 534 545 629 501 337 335 322 442 402 288 458 377 295 196 166 151 234 200 175 156 217 149 161 154 126 120 149 96 111 76 134 73 80 97 75 66 77 105 64 95 101 55 99 92 44 62 61 69 104 81 50 63 57 54 66 56 66 68 51 51 41 43 53 42 65 36 56 -8 26 48 20 33 40 42 -19 30 33 34 -20 22 28 6 15 17 34 14 29 -13 18 26 -39 -12 -18 11 -11 -9 -16 13 -19 -19 -24 -27 12 -10 -34 -18 21 25 26 -22