% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 99 116 76 75 76 89 61 138 115 108 53 225 223 385 444 275 239 237 293 376 256 135 281 348 236 230 254 207 277 202 198 165 117 115 88 130 84 59 81 83 58 79 35 32 -25 30 48 26 19 -14 -23 -8 10 51 47 29 58 27 23 55 73 29 59 58 56 70 39 62 39 43 47 -21 93 75 45 72 68 74 45 67 37 -14 16 50 33 48 13 26 39 47 34 29 32 12 -22 -37 44 -25 21 31 25 40 -10 -20 36 38 -11 -19 -5 31 -8 16 15 -32 -33 -26 25 -24 22 -34 -22 -32 -6 33 -20 -38 -31 -35