% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 126 139 92 48 76 57 81 193 235 135 109 167 106 103 135 124 157 129 176 224 356 178 200 186 218 147 165 163 114 140 105 59 110 112 52 65 54 25 62 11 79 53 41 49 57 48 18 68 27 47 32 37 16 34 35 43 44 77 59 57 64 78 95 91 82 117 92 87 117 59 103 100 88 95 78 28 76 82 70 60 80 42 89 17 61 60 48 45 28 38 34 -16 30 19 38 43 27 8 -30 -13 -14 -27 -32 59 -28 -21 42 -9 56 -20 24 32 11 -22 28 -11 -29 -31 22 38 -23 30 -42 -35 37 -36 -45 -31