% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 88 74 66 45 18 26 -8 109 115 133 67 100 128 143 232 204 362 315 384 487 425 335 314 354 246 240 213 272 211 107 193 160 205 144 174 140 122 142 139 193 155 156 78 147 118 120 100 110 118 127 140 83 125 91 71 105 35 116 53 81 54 62 78 45 56 61 52 37 53 40 46 44 -18 24 34 48 65 -29 45 44 -25 29 36 -24 -40 -12 -26 13 -27 4 40 -30 24 -20 -22 -32 -39 -31 -7 13 -29 -18 -13 36 -27 -27 4 3 -6 -19 26 0 -29 9 20 42 20 -7 59 25 -6 -27 -27 25 6 17 39 -4