% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 231 82 52 64 46 74 100 79 150 182 334 278 232 171 262 256 167 234 112 160 174 231 282 280 301 221 271 468 229 328 248 261 135 233 180 227 205 115 217 159 126 145 122 103 90 98 90 88 74 73 101 71 59 60 78 71 74 53 58 61 63 51 60 67 47 40 60 52 46 32 46 42 54 40 39 42 31 43 29 31 17 30 24 31 30 25 24 6 32 6 -14 32 36 29 18 -14 6 9 17 11 -15 -13 -11 -11 12 -9 23 -14 12 -12 -13 18 -15 -11 -19 -8 19 -6 -15 16 -19 20 14 -21 19 7 -7 10