% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 353 150 134 115 80 85 81 122 91 163 163 227 206 217 224 180 202 183 397 510 585 763 630 458 469 348 286 276 281 161 213 187 188 183 154 256 167 124 146 99 84 105 68 88 79 79 77 63 77 64 55 62 54 40 56 36 36 46 26 64 51 40 43 59 45 23 22 49 40 34 40 18 51 38 45 25 47 38 10 48 38 45 14 46 37 -9 16 19 -4 30 20 -21 38 -29 19 31 34 27 41 -28 -20 -22 -15 -5 -13 16 4 22 -13 20 -8 16 -24 -8 -24 31 -26 -17 -12 8 14 16 -26 -19 -29 -30 17 25