% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 122 70 46 45 -35 40 28 86 52 71 169 120 240 403 222 156 197 130 87 204 132 187 186 161 203 223 190 219 177 134 79 61 95 73 77 106 78 160 159 86 165 164 163 135 135 124 159 153 94 85 82 56 58 73 100 70 68 48 117 62 81 81 66 42 61 67 56 58 52 -18 61 67 -28 36 2 -9 48 44 26 31 50 54 -7 37 -18 -20 -41 10 19 -27 -24 18 27 44 30 -27 -17 -21 20 35 -13 -40 -21 31 16 -22 36 -26 46 35 -43 -47 32 44 -20 -19 3 -40 51 -20 36 23 -23 -29 13 -36 -13 -31