% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 76 55 34 56 21 53 105 110 134 113 152 186 186 196 317 418 626 295 289 168 177 147 108 165 120 101 92 47 71 59 64 79 26 40 69 26 -18 -19 34 -7 -21 -9 -34 2 -23 45 25 3 63 19 26 24 33 -18 29 32 28 -20 40 71 -4 36 47 58 56 37 22 -27 58 38 41 51 13 50 37 20 64 48 -15 31 55 25 31 37 21 32 39 37 -31 18 9 47 -2 -26 26 -29 12 53 10 39 31 -36 22 26 -32 -14 19 -33 2 34 -16 8 -15 6 -10 -18 28 10 -17 39 13 -30 24 -38 -34 -14 -35 -23