% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 200 245 134 153 147 139 198 155 240 183 604 593 356 398 340 366 190 238 136 156 165 175 140 83 97 120 76 92 88 68 78 79 82 94 72 61 49 69 58 68 40 45 33 43 24 72 59 50 55 46 45 62 48 45 21 44 60 77 59 51 32 55 79 75 74 50 66 60 77 47 69 52 48 47 29 -26 25 -17 18 -25 32 54 46 36 -19 24 39 38 -27 7 49 -29 -13 7 26 9 26 -11 12 8 29 14 11 33 -22 21 -22 -18 20 -31 -9 24 -18 26 8 -14 -34 -25 -19 -24 13 27 29 11 -34 35 -30 -18