% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 340 126 110 106 88 97 88 147 180 202 105 169 137 200 183 250 247 203 167 237 241 167 131 144 110 101 83 97 78 95 105 102 56 47 107 66 59 79 66 56 40 63 63 54 57 62 61 89 59 73 56 84 54 57 91 94 80 79 72 90 69 61 94 86 43 38 65 48 45 39 31 47 -6 -10 29 34 -8 12 27 5 -8 28 -22 38 -26 -21 20 -15 -19 41 33 12 41 -34 -22 -27 18 29 27 25 -28 10 -37 -11 -35 -37 -35 23 35 29 -35 -29 -11 -18 44 26 25 -17 -17 -24 -34 31 36 28 -30 22 -15 21