% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 170 177 148 141 94 107 112 109 107 275 540 1023 1831 1789 879 965 856 744 559 516 310 308 184 381 226 510 250 215 190 259 269 195 96 95 103 119 82 113 120 100 80 87 59 82 103 60 53 53 64 39 40 27 47 71 56 50 21 20 20 38 20 23 29 -31 6 28 -9 17 33 7 -25 11 -36 -10 -20 23 -30 -26 -13 14 -16 22 -34 -27 -3 -36 14 -39 -24 16 26 17 17 3 -23 -31 11 -23 -6 24 49 -15 38 33 -30 17 -30 26 -18 14 32 -13 -15 29 21 -8 -23 24 -33 -21 -19 -27 -31 -31 -4 28 -31 -29