% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 142 162 198 181 103 99 112 703 1482 641 665 634 471 377 237 146 397 249 209 201 130 162 193 130 131 97 155 184 131 128 140 124 162 82 90 96 138 50 79 60 53 64 40 46 22 34 19 52 23 -6 32 45 38 21 28 28 60 43 36 45 33 53 58 37 32 45 51 44 27 28 34 36 -8 37 33 28 55 23 27 49 -17 -21 61 -26 16 15 34 23 -9 -23 31 -17 17 -21 25 -11 4 -25 -27 -23 -20 20 -14 -23 -31 -5 33 35 -16 3 -26 24 -33 19 -11 -16 -27 30 15 21 -16 31 20 29 -25 -16 22 17