% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 65 67 36 53 42 39 29 39 32 73 82 117 250 232 245 56 147 125 112 139 88 87 115 80 119 57 54 48 33 24 -14 9 -21 12 -21 -25 -17 -23 11 -22 -25 -17 -23 -27 -20 -16 -8 -28 -26 -26 -29 -26 -20 -20 -28 -25 -22 -14 -26 -16 -28 -22 -18 -29 -30 -29 -18 -30 6 -26 -27 -25 -8 -26 -28 -29 -27 -17 -26 -26 -28 -21 -24 -12 -25 -23 -25 -29 -20 -18 10 -28 -26 -16 -6 -14 -22 -28 -18 -24 -26 -30 -26 -22 -18 -14 -28 -14 15 -9 20 -6 -21 16 14 -16 -16 11 3 14 32 34 32 10 25 44 28 25