% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 115 65 66 73 23 47 54 88 77 124 176 216 332 446 328 375 432 307 309 251 251 218 262 194 194 189 121 150 150 160 272 111 64 62 83 76 64 104 76 89 40 36 35 -5 31 12 -12 53 45 -8 -28 -25 33 -26 -20 32 -12 31 25 -40 49 62 31 35 26 12 31 8 48 60 45 70 32 30 16 -24 50 58 46 19 -36 42 27 18 18 45 24 -21 -32 19 -13 25 14 -42 -29 -31 21 -38 -22 35 25 45 -25 48 -18 27 -9 33 -30 -22 -14 -17 40 -45 13 -36 -4 -11 -39 8 17 6 -24 -35 16 41 -22 -22