% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 114 159 268 139 142 97 83 116 137 138 204 472 888 1308 1355 1683 1801 1239 823 980 735 815 632 577 461 573 491 425 551 743 407 290 267 292 347 288 220 200 270 168 150 120 147 109 119 129 92 114 99 107 92 69 82 76 90 67 81 47 36 79 60 52 44 27 54 -32 -14 14 37 -25 -24 14 -50 17 -23 -16 -34 -33 22 -39 51 24 -38 5 7 -39 -40 50 -29 -30 26 -36 -25 -26 41 -41 22 9 -24 -32 27 -10 -18 39 26 -12 12 25 -24 -28 -39 -18 12 -18 -40 -35 -33 23 26 -19 -18 34 -24 16 10 41 37 29