% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 490 331 165 122 155 123 100 113 157 148 262 429 343 344 219 154 104 150 119 101 157 161 163 85 123 92 99 70 98 82 97 69 77 75 62 73 56 57 76 66 58 80 47 53 85 53 52 42 59 52 45 22 27 44 55 32 30 75 57 56 57 48 37 28 48 63 57 72 59 53 54 42 61 46 54 55 38 46 45 45 41 50 36 25 27 -5 26 47 23 22 40 35 28 31 -11 -12 -14 -22 17 -7 15 -2 -3 -17 4 5 -17 12 -16 -11 8 26 8 -5 18 -24 -20 30 35 17 -16 -13 13 14 -6 -18 -26 12