% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 77 68 61 35 70 54 44 10 74 117 100 164 142 176 217 233 426 373 716 756 474 623 402 419 239 250 298 236 301 252 292 172 233 106 142 190 137 107 108 144 126 94 123 95 106 102 110 119 86 66 91 52 112 55 25 79 69 102 96 111 78 114 69 57 109 73 101 112 85 92 60 61 57 88 63 82 78 76 73 40 42 57 55 55 44 27 67 62 48 51 51 -8 40 -15 36 15 26 20 39 -24 21 13 -24 31 42 44 17 -7 17 36 29 -33 -15 -20 -26 -35 -25 -23 -24 27 -28 -31 -21 -22 -25 7 13 -19