% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 105 46 51 85 55 75 72 59 99 173 167 172 149 130 127 119 131 144 106 78 104 62 120 111 80 49 81 51 33 57 50 41 35 31 54 59 27 44 33 50 21 31 35 20 16 44 -6 -15 37 -20 6 -19 32 35 -30 -2 -10 17 48 36 41 52 55 51 36 46 50 69 15 54 39 50 12 38 30 50 64 33 33 13 36 32 46 32 -25 26 40 41 33 -20 -37 45 -11 16 38 30 14 17 -15 25 -27 -12 -5 -35 38 11 18 -23 28 -14 14 27 -14 -25 -28 -25 41 30 -29 -4 -14 33 -9 14 -3 3 25 -11