% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 250 231 167 157 166 148 107 105 258 240 130 378 522 374 363 496 493 387 364 304 283 168 167 182 151 175 229 160 190 119 105 108 129 141 100 75 79 88 84 98 84 57 59 63 58 67 55 34 66 56 32 48 42 44 24 44 38 39 42 58 47 31 39 18 40 29 37 -17 12 -25 19 45 -17 -23 24 33 8 15 35 34 21 31 35 -20 -11 14 18 -13 -25 -19 -21 -21 -20 -24 10 17 17 33 21 -17 -32 -13 -18 47 4 34 15 13 17 -26 25 -29 -33 -22 -32 -14 25 -26 -18 -20 -34 8 -14 -33 13 40 37 -15