% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 141 104 90 49 67 47 60 199 349 365 260 252 233 271 353 270 235 183 298 231 237 213 132 160 144 185 204 255 220 232 292 186 266 197 202 173 227 134 157 133 113 192 173 175 125 101 79 82 82 103 91 78 91 72 116 99 94 61 73 62 85 53 41 62 65 68 49 64 63 48 72 28 70 36 70 27 75 29 39 59 9 37 46 23 64 -15 41 31 41 31 45 64 -15 -29 -38 -22 -16 38 50 -4 -31 -28 -7 -12 -39 -29 0 31 -23 27 -34 -19 -17 15 22 38 11 -16 32 37 14 -32 -18 -45 -28 21 13 38