% Echo Location Surface Spectrum in units of mm/sqrt(Hz) % 128 Frequency Bands are 0.00781250 Hz wide 166 109 90 73 92 73 67 76 92 91 143 298 226 386 255 152 172 136 139 206 209 76 137 144 99 146 122 96 101 80 141 84 74 107 78 31 70 26 53 92 113 75 81 96 94 78 114 117 158 199 175 128 155 117 123 109 160 153 95 80 123 68 45 79 81 70 85 92 69 58 38 55 57 56 40 44 59 55 18 64 36 52 38 14 52 40 41 6 -19 30 -36 -22 17 -21 20 43 50 36 38 48 16 13 -19 -20 -34 10 17 10 36 -19 -33 -19 -37 11 -45 -31 -28 41 -27 35 -31 12 -19 26 -32 21 -34 8