% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 122 119 84 105 92 39 48 48 28 28 70 59 162 374 448 960 682 437 805 622 398 625 454 548 447 436 491 350 335 287 295 280 284 221 236 214 202 177 193 187 105 122 126 191 132 125 99 134 117 120 100 116 122 115 74 81 95 58 80 67 59 95 68 75 106 33 53 74 53 14 55 58 66 -14 58 40 -23 35 36 -4 18 29 34 15 25 -16 18 10 -17 11 7 -21 8 -17 -17 -20 9 -26 -10 -36 -34 -6 -19 -24 -26 -20 -12 6 -19 -23 -30 37 7 18 23 15 -2 10 19 -19 10 11 27 9 31 16 39 30