% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 25 72 54 49 19 35 41 47 37 47 137 132 156 250 400 300 389 368 518 662 382 480 397 279 105 179 215 184 237 123 121 188 136 113 139 90 142 184 199 199 139 140 101 202 200 228 174 126 172 166 138 150 98 83 97 116 148 78 124 74 70 79 88 88 63 75 81 111 95 66 66 74 79 98 52 39 67 94 81 41 61 65 -23 25 40 36 51 36 65 48 -15 43 48 43 -15 32 45 -17 -25 36 44 14 27 36 -17 40 -12 30 -35 -35 -40 28 -21 -35 31 -24 39 15 -24 -33 -24 -22 -28 -35 -28 40 13 -15