% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 154 78 72 54 59 42 53 46 41 69 83 143 205 285 347 640 477 297 518 586 392 388 279 311 341 229 187 221 181 150 136 70 129 80 72 142 111 106 126 81 63 71 50 81 75 82 64 54 59 76 75 67 62 52 59 75 58 68 43 44 42 69 57 23 44 59 30 42 28 51 38 16 28 20 30 23 32 37 25 23 0 -18 14 32 -14 5 27 28 -2 13 18 25 21 19 27 25 -18 18 -16 -16 -21 -12 24 24 2 -10 -15 -15 27 30 -15 -18 -16 -17 27 -18 21 -12 -15 5 4 7 -17 -7 -15 10 12 15