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Last Post 26 Mar 2012 08:31 PM by anon

Atmospheric correction of Hyperion data

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anon

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26 Mar 2012 08:31 PM
Hi I have used the hyperion tools to convert L1R file. I ticked the flaash scale text file option. The user guide for the tool asks the header file to be edited prior to Flaash conversion. Is this the header file which has data under the string bbl shown below? ENVI description = { ENVI File, Created [Mon Mar 19 18:01:29 2012]} samples = 256 lines = 7030 bands = 242 header offset = 0 file type = ENVI Standard data type = 2 interleave = bil sensor type = Unknown byte order = 0 coordinate system string = {GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]} wavelength units = Nanometers geo points = { 1.0000, 1.0000, -31.98533249, 151.46737671, 256.0000, 1.0000, -32.00107574, 151.54618835, 1.0000, 7030.0000, -33.84673309, 150.94390869, 256.0000, 7030.0000, -33.86275482, 151.02438354} wavelength = { 355.588867, 365.764191, 375.939209, 386.114594, 396.290192, 406.464996, 416.640198, 426.815704, 436.991150, 447.166473, 457.341797, 467.517273, 477.692230, 487.867889, 498.042847, 508.218414, 518.393738, 528.568787, 538.744385, 548.919373, 559.094421, 569.269592, 579.445496, 589.620483, 599.795898, 609.971252, 620.146362, 630.321960, 640.497192, 650.672729, 660.847961, 671.022461, 681.198669, 691.373230, 701.548828, 711.723938, 721.899353, 732.074890, 742.249939, 752.425354, 762.600342, 772.776306, 782.951416, 793.126892, 803.301941, 813.477173, 823.652100, 833.827820, 844.003052, 854.178650, 864.353271, 874.529053, 884.704407, 894.879272, 905.054688, 915.229858, 925.405518, 935.580933, 945.755493, 955.931274, 966.106018, 976.281738, 986.457092, 996.632690, 1006.807556, 1016.982666, 1027.158447, 1037.333496, 1047.508179, 1057.684570, 851.920593, 862.009583, 872.097717, 882.186707, 892.275391, 902.362854, 912.451538, 922.541443, 932.639160, 942.727234, 952.816467, 962.905151, 972.993164, 983.082458, 993.170898, 1003.299622, 1013.298279, 1023.397766, 1033.494385, 1043.592773, 1053.692261, 1063.791626, 1073.888428, 1083.986938, 1094.086914, 1104.186035, 1114.185181, 1124.282715, 1134.379639, 1144.479126, 1154.578369, 1164.675049, 1174.774170, 1184.873901, 1194.972412, 1205.071411, 1215.168457, 1225.167114, 1235.265625, 1245.364380, 1255.464233, 1265.561768, 1275.661011, 1285.757935, 1295.858154, 1305.956421, 1316.054932, 1326.053101, 1336.150391, 1346.251343, 1356.349121, 1366.447632, 1376.545044, 1386.645264, 1396.742432, 1406.843018, 1416.940063, 1426.938110, 1437.037720, 1447.135620, 1457.234741, 1467.333008, 1477.431152, 1487.531616, 1497.628418, 1507.727783, 1517.825684, 1527.924683, 1537.923462, 1548.022217, 1558.120972, 1568.218750, 1578.316895, 1588.415649, 1598.513672, 1608.614502, 1618.711060, 1628.812012, 1638.810059, 1648.904663, 1659.004272, 1669.102783, 1679.204224, 1689.303833, 1699.399048, 1709.498657, 1719.597778, 1729.696289, 1739.695068, 1749.790894, 1759.889404, 1769.991211, 1780.086670, 1790.187744, 1800.286987, 1810.384033, 1820.483032, 1830.580444, 1840.579468, 1850.677612, 1860.778198, 1870.873291, 1880.975220, 1891.074097, 1901.171021, 1911.268799, 1921.368408, 1931.465576, 1941.567871, 1951.565674, 1961.661377, 1971.762451, 1981.860474, 1991.958252, 2002.056274, 2012.154053, 2022.252930, 2032.351440, 2042.452026, 2052.450195, 2062.549805, 2072.646973, 2082.745361, 2092.843994, 2102.940430, 2113.041748, 2123.138428, 2133.239258, 2143.338135, 2153.336914, 2163.433838, 2173.532959, 2183.629639, 2193.729004, 2203.829102, 2213.926270, 2224.025391, 2234.123047, 2244.221680, 2254.220459, 2264.320801, 2274.417480, 2284.516602, 2294.614502, 2304.712646, 2314.813232, 2324.910400, 2335.008545, 2345.108154, 2355.206055, 2365.204590, 2375.303711, 2385.401367, 2395.500000, 2405.600342, 2415.697510, 2425.797119, 2435.894287, 2445.992432, 2456.092773, 2466.092041, 2476.188721, 2486.288086, 2496.385742, 2506.484131, 2516.585205, 2526.680908, 2536.781250, 2546.878418, 2556.976807, 2566.975342, 2577.076416} fwhm = { 11.387069, 11.387069, 11.387069, 11.387069, 11.387069, 11.387069, 11.387069, 11.387069, 11.387069, 11.387069, 11.387069, 11.387069, 11.387069, 11.378412, 11.353799, 11.313286, 11.257956, 11.190670, 11.111876, 11.024475, 10.932116, 10.836849, 10.740730, 10.648172, 10.560740, 10.482296, 10.414705, 10.359532, 10.318789, 10.294209, 10.285648, 10.298001, 10.334926, 10.390866, 10.459152, 10.532218, 10.600388, 10.656223, 10.693290, 10.705812, 10.727590, 10.790669, 10.883322, 10.993826, 11.104447, 11.197998, 11.259979, 11.282372, 11.282177, 11.281550, 11.280886, 11.279675, 11.278229, 11.277094, 11.276466, 11.275604, 11.275408, 11.275408, 11.275408, 11.275408, 11.275408, 11.275408, 11.275408, 11.275408, 11.275408, 11.275408, 11.275408, 11.275408, 11.275408, 11.275408, 11.045745, 11.045745, 11.045745, 11.045745, 11.045745, 11.045745, 11.045745, 11.045745, 11.045745, 11.045745, 11.045745, 11.045745, 11.045745, 11.045745, 11.045745, 11.045745, 11.045745, 11.045121, 11.042276, 11.037157, 11.030202, 11.021839, 11.012188, 11.001288, 10.987149, 10.973206, 10.957180, 10.941823, 10.924777, 10.906457, 10.888368, 10.869572, 10.851287, 10.833467, 10.815414, 10.797939, 10.782193, 10.766252, 10.752035, 10.738475, 10.727023, 10.717407, 10.709053, 10.702183, 10.696951, 10.694571, 10.693673, 10.694883, 10.699568, 10.705814, 10.716322, 10.728311, 10.743749, 10.761214, 10.780669, 10.803431, 10.826705, 10.853430, 10.881842, 10.911016, 10.942230, 10.974340, 11.007353, 11.041367, 11.075892, 11.110817, 11.146131, 11.181055, 11.215555, 11.249614, 11.282591, 11.314620, 11.346040, 11.375298, 11.403707, 11.430158, 11.453787, 11.475977, 11.495824, 11.513288, 11.528568, 11.540448, 11.550521, 11.557981, 11.562119, 11.563370, 11.561729, 11.556263, 11.547711, 11.534625, 11.519345, 11.500200, 11.478948, 11.454808, 11.427855, 11.399373, 11.368784, 11.336638, 11.303554, 11.269594, 11.236332, 11.200705, 11.166571, 11.133349, 11.101814, 11.071401, 11.042363, 11.015479, 10.991242, 10.969766, 10.950822, 10.935470, 10.923048, 10.913946, 10.908324, 10.906919, 10.905670, 10.901335, 10.895052, 10.885449, 10.873959, 10.859108, 10.842889, 10.824248, 10.803929, 10.781975, 10.759172, 10.734158, 10.709188, 10.683395, 10.657180, 10.631242, 10.605241, 10.580349, 10.556010, 10.532821, 10.510121, 10.490440, 10.472229, 10.455226, 10.440802, 10.428500, 10.419719, 10.412930, 10.408829, 10.407698, 10.407698, 10.407698, 10.407698, 10.407698, 10.407698, 10.407698, 10.407698, 10.407698, 10.407698, 10.407698, 10.407698, 10.407698, 10.407698, 10.407698, 10.407698, 10.407698, 10.407698, 10.407698, 10.407698, 10.407698, 10.407698, 10.407698, 10.407698, 10.407698, 10.407698, 10.407698} bbl = { 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}

Deleted User

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26 Mar 2012 11:45 PM
Hi Lucky, Yes... you should edit below bbl string and put the value 1 replacing first seven places in red and after FLAASH conversion you need to make them back to zero in the FLAASH output. bbl = { 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} Cheers -Anuj Singh

Deleted User

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27 Mar 2012 03:49 AM
Hi Anuj, Many thanks for getting back to me. Does that mean the converted data needs to be saved first in standard envi format to generate a new header file? or am I missing something? regards Lucky

Deleted User

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29 Mar 2012 03:56 AM
Hi Lucky, Hyperion tools gives you the output in Envi format with header info. You can always edit the header file and update the wavelength, FWHM, Bad Bands List info selecting edit envi header tool. These depends on your data and objectives. Hope this helps you. Regards -Anuj

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