% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 207 154 102 99 147 106 106 133 175 120 84 156 259 224 273 321 211 172 171 115 110 115 119 121 86 111 52 99 69 87 73 52 47 40 33 -5 44 33 -11 25 24 24 26 13 -18 38 20 50 33 -10 31 18 11 -16 37 16 20 -35 -14 -27 14 26 -32 16 -21 19 -28 -23 -28 -32 -13 -21 -37 -36 7 -35 -15 -7 -23 -28 -13 27 -33 -12 -26 -30 -20 35 14 11 -5 31 13 -16 -31 -31 22 13 31 -3 24 -18 -30 31 30 -25 43 -25 -18 -24 -30 -29 -34 21 30 -23 36 -11 -23 7 -34 -22 15 -11 22 22 13 9