% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 109 86 196 114 78 88 86 131 103 144 264 505 824 538 700 408 591 445 609 381 497 377 432 437 355 601 582 356 457 371 474 322 292 319 226 378 175 224 182 166 274 200 248 187 158 169 193 150 142 122 137 141 123 148 123 126 134 96 97 88 68 81 68 85 60 81 81 79 50 71 48 65 79 79 49 51 61 77 46 72 54 52 16 -12 73 25 27 7 23 51 65 39 31 -15 27 -12 16 12 9 30 -18 34 31 -5 -14 -17 -18 -31 -22 25 28 -26 -24 20 35 7 -20 12 -13 33 0 -21 -31 -30 9 12 -8 -20