% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 81 78 127 132 121 81 94 82 144 177 147 176 247 426 495 613 617 371 476 405 338 522 202 345 245 498 337 247 398 213 299 268 184 200 233 199 146 212 199 142 137 143 96 117 111 86 37 83 100 82 95 68 83 57 67 53 38 51 64 34 42 72 47 45 69 37 19 49 24 45 10 -12 24 51 45 33 23 33 10 32 29 33 -16 17 -28 28 33 -21 31 30 15 22 9 -21 16 7 -32 -22 -14 -20 15 -10 -15 -16 40 -20 -5 44 26 15 18 16 20 -14 22 -9 -15 22 5 26 -26 -18 -11 -35 -18 23 -13 -34