% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 144 68 57 74 55 85 68 -19 84 80 162 296 468 337 545 197 223 225 321 286 440 306 138 193 296 271 270 267 149 288 342 309 274 423 314 448 317 336 253 368 380 231 167 268 164 179 221 178 137 169 150 89 93 132 118 106 97 107 115 97 75 66 112 70 106 80 73 75 95 70 72 89 49 -11 48 71 45 54 44 53 51 19 55 62 39 40 4 56 38 -8 -13 25 -5 37 53 52 47 49 12 15 -12 -24 19 24 25 -15 23 -23 16 24 36 -31 -22 -22 -18 -22 -15 -12 -17 -22 -19 -30 -20 -22 -32 -25 -11 31