I am running FLAASH in ENVI 5.0 and trying to do atmospheric correction on airborne hyperspectral data. The data has level 1b radiometric corrrection applied and is in nWcm-2sr-1nm-1 unsigned interger. I have applied the band math float(b1) followed by converstion from bsq to bil as an input radiance image for FLAASH. However I am continiously getting the error: "ACC error: avrd: IDL error: POINT LUN: Negative position argument not allowed. Position -204215960, Unit 102" See below template file and journal file (with error) for FLAASH. Any help with this matter would be greatly appreciated Jerome Template File ;ENVI FLAASH PARAMETERS TEMPLATE (5.0);Written Mon May 11 13:07:21 2015;; Project Parametersenviacc.prj.radiance_file = C:\Raw Data\ARSF\Hyperspectral\GB13_01-163a-hyperspectral-20140723\flightlines\level1b\f163a021b_masked_float.bilenviacc.prj.reflect_file = C:\Raw Data\ARSF\Hyperspectral\GB13_01-163a-hyperspectral-20140723\flightlines\level1b\f163a021b_masked_float_flaash.bilenviacc.prj.water_band_choice = 1.13enviacc.prj.water_retrieval = 1enviacc.prj.user_stem_name = f163a021b_masked_float_flaash_enviacc.prj.modtran_directory = C:\Raw Data\ARSF\Hyperspectral\GB13_01-163a-hyperspectral-20140723\flightlines\level1b\;; MODTRAN Parametersenviacc.modtran.visvalue = 40.0000enviacc.modtran.f_resolution = 5.0000enviacc.modtran.day = 12enviacc.modtran.month = 6enviacc.modtran.year = 2014enviacc.modtran.gmt = 8.1831enviacc.modtran.latitude = 52.0812enviacc.modtran.longitude = 0.1250enviacc.modtran.sensor_altitude = 0.7430enviacc.modtran.ground_elevation = 0.0450enviacc.modtran.view_zenith_angle = 180.0000enviacc.modtran.view_azimuth = 0.0000enviacc.modtran.atmosphere_model = 2enviacc.modtran.aerosol_model = 1enviacc.modtran.multiscatter_model = 2enviacc.modtran.disort_streams = 8enviacc.modtran.co2mix = 390.0000enviacc.modtran.water_column_multiplier = 1.0000;; Image Parametersenviacc.img.nspatial = 384enviacc.img.nlines = 16737enviacc.img.data_type = 4enviacc.img.margin1 = 0enviacc.img.margin2 = 0enviacc.img.nskip = 0enviacc.img.pixel_size = 1.1000enviacc.img.sensor_name = UNKNOWN-HSI;; Analysis Parametersenviacc.ana.aerosol_scaleht = 1.5000enviacc.ana.use_adjacency = 1enviacc.ana.output_scale = 10000.0000enviacc.ana.polishing_res = 9enviacc.ana.aerosol_retrieval = 1enviacc.ana.calc_wl_correction = 0enviacc.ana.reuse_modtran_calcs = 0enviacc.ana.use_square_slit_function = 0enviacc.ana.convolution_method = fftenviacc.ana.use_tiling = 1enviacc.ana.tile_size = 100.0000;; GParameters Parametersenviacc.gparameters.gfact = 0enviacc.gparameters.gval = 0.0000enviacc.gparameters.use_lr_method = 0enviacc.gparameters.multikernel = 1enviacc.gparameters.autoroi = autoenviacc.gparameters.selarg = a;; Spectral Parametersenviacc.spc.wavelength_units = nanometerenviacc.spc.lambda = [ 381.6600, 383.3500, 385.0400, 386.7300, 388.4100, 390.1000, 391.7900, 393.4700, 395.1600, 396.8500, 398.5400, 400.2200, 401.9100, 403.6000, 405.2800, 406.9700, 408.6600, 410.3500, 412.0300, 413.7200, 415.4100, 417.0900, 418.7800, 420.4700, 422.1600, 423.8400, 425.5300, 427.2200, 428.9000, 430.5900, 432.2800, 433.9700, 435.6600, 437.3600, 439.0600, 440.7600, 442.4600, 444.1700, 445.8700, 447.5700, 449.2700, 450.9800, 452.6800, 454.3800, 456.0800, 457.7800, 459.4900, 461.1900, 462.8900, 464.5900, 466.2900, 468.0000, 469.7000, 471.4000, 473.1000, 474.8000, 476.5000, 478.2100, 479.9100, 481.6100, 483.3100, 485.0200, 486.7200, 488.4200, 490.1200, 491.8200, 493.5300, 495.2300, 496.9300, 498.6300, 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1.0000, 1.0000, 1.0000, 1.0000, 1.0000, 1.0000] FLAASH Journal file FLAASH Run Date: Tue May 12 15:36:46 2015 Tiled Processing Being Used Tile Dimensions = [192 x 166] Total Number of Tiles = 16********************************************************************************** Making Visibility MODTRAN Data Using Scriptfile.008******************************************************************************** *****************FLAASH-SLANT**************** Spectral Sciences Atmospheric Correction Code 1998-2008 Version 02232012 ** See Instructions for Use ** ************* MAIN MENU *************** Commands: m = set up MODTRAN input file r = Run MODTRAN h = Hyperspectral data analysis a = About FLAASH (Instructions) c = Convert existing MODTRAN tape7 w = Read Warfighter run file, create initial tape5 q = Quit script command h Path for output files (except output reflectance cube) is C:\Raw Data\ARSF\Hyperspectral\GB13_01-163a-hyperspectral-20140723\flightlines\level1b\Enter u = Use this path or a = select Another path :script command u ************ DATA ANALYSIS MENU ************* Setup Commands: S = I/O Setup, interactive s = I/O Setup via serial queries d = new radiance Data cube a = Adjacency algorithm setup (create averaged image) q = Quit to main menu Processing Commands: i = simulate radiance Image from reflectance M = prepare MODTRAN run R = run MODTRAN WC = Channel Wavelength Correction Utility Commands: ? = menu help p = Plot pixel spectra e = display Existing reflectance file script command MSelect option: g = standard GUI interface v = visibility setupscript command callEstimated MODTRAN run time: 0.23780368 minEstimated MODTRAN run time: 0.23850311 min ************ DATA ANALYSIS MENU ************* Setup Commands: S = I/O Setup, interactive s = I/O Setup via serial queries d = new radiance Data cube a = Adjacency algorithm setup (create averaged image) q = Quit to main menu Processing Commands: i = simulate radiance Image from reflectance M = prepare MODTRAN run R = run MODTRAN WC = Channel Wavelength Correction Utility Commands: ? = menu help p = Plot pixel spectra e = display Existing reflectance file script command RRun MODTRAN using tape5 in current directory: Are you sure? y=yes n=noscript command yConverting tape7 to ACC archive (.fla) file for storageSelect archive filenameOpening archive file to write: C:\Raw Data\ARSF\Hyperspectral\GB13_01-163a-hyperspectral-20140723\flightlines\level1b\acc_modroot.flaEnter u = Use this file, a = select Another file (dialog),or d = select another file (Direct filename entry) :script command uNo. of spectra= 1No. of spectra= 2No. of spectra= 3No. of spectra= 4No. of spectra= 5No. of spectra= 6No. of spectra= 7No. of spectra= 8No. of spectra= 9No. of spectra= 10No. of spectra= 11No. of spectra= 12No. of spectra= 13No. of spectra= 14No. of spectra= 15No. of spectra= 16No. of spectra= 17No. of spectra= 18No. of spectra= 19No. of spectra= 20No. of spectra= 21No. of spectra= 22No. of spectra= 23No. of spectra= 24No. of spectra= 25No. of spectra= 26No. of spectra= 27Column water range= 2.85979 to 2.85979 g/cm2 ( 3558.10 to 3558.10 atm-cm)No. of frequencies= 5293File archivedUse C:\Raw Data\ARSF\Hyperspectral\GB13_01-163a-hyperspectral-20140723\flightlines\level1b\acc_modroot.fla as current MODTRAN archive file? 0 = no 1 = use as altitude loop file 2 = use as water loop file 3 = use as aerosol loop filescript command 3 ************ DATA ANALYSIS MENU ************* Setup Commands: S = I/O Setup, interactive s = I/O Setup via serial queries d = new radiance Data cube a = Adjacency algorithm setup (create averaged image) q = Quit to main menu Processing Commands: i = simulate radiance Image from reflectance M = prepare MODTRAN run R = run MODTRAN WC = Channel Wavelength Correction Utility Commands: ? = menu help p = Plot pixel spectra e = display Existing reflectance file script command qOverwrite old file name list (filename.txt) with current file names? n=no y=yesscript command n********************************************************************************** Computing Visibility for FLAASH Tile 1 Using Scriptfile.009******************************************************************************** *****************FLAASH-SLANT**************** Spectral Sciences Atmospheric Correction Code 1998-2008 Version 02232012 ** See Instructions for Use ** ************* MAIN MENU *************** Commands: m = set up MODTRAN input file r = Run MODTRAN h = Hyperspectral data analysis a = About FLAASH (Instructions) c = Convert existing MODTRAN tape7 w = Read Warfighter run file, create initial tape5 q = Quit script command h Path for output files (except output reflectance cube) is C:\Raw Data\ARSF\Hyperspectral\GB13_01-163a-hyperspectral-20140723\flightlines\level1b\Enter u = Use this path or a = select Another path :script command u ************ DATA ANALYSIS MENU ************* Setup Commands: S = I/O Setup, interactive s = I/O Setup via serial queries d = new radiance Data cube a = Adjacency algorithm setup (create averaged image) q = Quit to main menu Processing Commands: i = simulate radiance Image from reflectance M = prepare MODTRAN run R = run MODTRAN WC = Channel Wavelength Correction Utility Commands: ? = menu help p = Plot pixel spectra e = display Existing reflectance file script command dReading header (if any) from image file C:\Raw Data\ARSF\Hyperspectral\GB13_01-163a-hyperspectral-20140723\flightlines\level1b\f163a011b\f163a011b_masked_float_new_bil.bilEnter u = Use this file, a = select Another file (dialog),or d = select another file (Direct filename entry) :script command u Select method for representing instrument spectral filter function. Type 1 for calculated function, 2 for a function defined by a file, 3 for external channel definitions passed in....type 99 to accept default from call.script command 99Computing wavelength response functions for each channel... ************ DATA ANALYSIS MENU ************* Setup Commands: S = I/O Setup, interactive s = I/O Setup via serial queries d = new radiance Data cube l = Load and display radiance data cube a = Adjacency algorithm setup (create averaged image) q = Quit to main menu Processing Commands: i = simulate radiance Image from reflectance v = aerosol Visibility determination k = Kaufman (ratio) visibility retrieval M = prepare MODTRAN run R = run MODTRAN WC = Channel Wavelength Correction Utility Commands: ? = menu help p = Plot pixel spectra e = display Existing reflectance file script command lChannel definitions: type 1 to use passed-in default, 2 to select manually between automatic and external-file channel definitions.script command 1Calculated channel nos. are Oxygen (altitude) ref= 210 211 212 213 214 215 216 217 218 228 229 230 231 232 233 234 235 236 abs= 219 220 221 222 223 224 225 226 227 Water ref= 362 363 364 365 366 386 387 388 389 390 abs= 374 375 376 377 378 R,G,B display= 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 Cirrus= 418 419 420 KT upper= 550 551 552 553 554 555 556 557 558 KT lower= 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 0.82 Water ref= 229 230 231 232 233 234 235 236 237 238 239 275 276 277 278 279 280 281 282 283 284 285 abs= 252 253 254 255 256 257 258 259 260 261 262 Vegetation-rise cutoff= 0.0592619 from channel 182 to 211Loading spectral data...ACC error...IDL error: -263 POINT_LUN: Negative position argument not allowed. Position: -1994383360, Unit: 102 File: C:\Raw Data\ARSF\Hyperspectral\GB13_01-163a-hyperspectral-20140723\flightlines\level1b\f163a011b\f163a011b_mas ked_float_new_bil.bil.in context: avrd:calls:ACC_AVRD ACC_HYPER2 ACC_ACC ENVI_ACC_EVENT ENVI_FLAASH_PROCESS_MANAGER IDLRTMAIN$MAIN$
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