% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 103 103 110 132 72 55 41 44 62 61 68 107 157 245 276 635 457 448 431 455 477 306 458 514 359 390 566 467 532 365 277 301 472 267 247 292 140 194 185 201 175 110 147 142 129 174 93 145 126 112 90 107 122 102 81 94 76 65 78 55 57 39 59 46 63 64 63 43 41 21 42 52 37 33 27 28 19 21 19 20 32 16 -22 -15 14 -9 -31 -20 -18 -12 -26 7 -15 8 27 -27 -22 -17 2 -32 13 -33 -10 -20 -37 20 24 26 3 16 18 -10 10 -25 7 37 -19 -13 32 -21 -23 29 45 28 -6 -24 -4 5