% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 196 95 88 100 63 81 123 71 97 477 222 213 198 268 222 186 358 124 201 142 170 146 245 386 450 339 307 401 438 404 429 301 359 273 281 122 246 336 223 162 109 126 231 144 126 144 86 107 106 148 119 107 127 114 114 105 97 125 76 70 70 99 76 73 69 58 65 29 100 72 61 48 67 65 29 41 59 40 62 47 61 56 23 31 59 -16 -15 28 40 38 -20 28 44 46 42 14 18 -10 38 6 -29 9 -10 25 -19 -22 34 -37 34 12 -21 28 -12 -17 44 -5 -19 17 -14 27 -32 -27 28 -30 -11 -23 17 18