% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 114 115 84 76 60 46 78 95 98 102 79 113 89 150 184 202 640 382 476 504 448 551 422 654 521 244 308 258 147 229 305 214 185 158 167 77 138 137 84 40 95 72 63 80 113 71 49 -21 74 52 44 71 62 61 58 45 63 61 43 52 63 39 43 48 -36 45 -28 -28 40 20 69 -30 27 -39 20 30 19 -33 30 21 -20 22 37 -51 22 -36 -12 -36 -32 23 31 24 47 -27 -32 23 44 2 7 -35 14 -4 -43 7 -14 29 -18 40 23 30 33 25 -42 -12 -26 -24 -18 35 -39 17 -27 -37 29 16 40 -28 33 -28