% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 98 59 89 89 72 122 97 115 86 114 113 127 160 219 250 353 327 309 299 213 170 192 165 131 221 147 128 110 149 75 114 110 49 69 119 113 77 114 89 60 10 75 58 71 83 76 29 20 67 50 65 43 83 58 73 59 49 -5 -11 69 58 50 61 59 54 47 41 60 34 22 54 43 60 43 19 -23 60 -38 -29 42 22 24 -17 29 17 14 -16 21 57 -27 -22 48 42 35 -31 29 28 -40 36 -52 -29 59 27 -15 20 -39 -43 48 27 -23 -29 -20 20 12 -17 -20 -40 -42 -18 33 6 -26 57 -11 31 41 -21 -27