Hi all, I just ran i.landsat.toar to get the radiance values for a TM5 image and I noticed that the comments in the output metadata (from r.info) have some problem.
1) I asked for radiance output but the comments says the image is reflectance. Image values are consistent with radiance values so I believe the line in the comments is wrong. 2) Values for earth-sun distance, digital number range etc are all 0. I'm using OSGeo4W, Grass7svn revision 54962 Bellow is the output from r.info so you can see what I mean --------------------------------------------- +----------------------------------------------------------------------------+ | Layer: rad2005_cor.1 Date: Fri Feb 15 08:38:31 2013 | | Mapset: PERMANENT Login of Creator: daniel | | Location: corr_Atm_utm23s | | DataBase: C:\grassdata | | Title: ( rad2005_cor.1 ) | | Timestamp: none | |----------------------------------------------------------------------------| | | | Type of Map: raster Number of Categories: 0 | | Data Type: DCELL | | Rows: 7001 | | Columns: 7951 | | Total Cells: 55664951 | | Projection: UTM (zone -23) | | N: 7548415.00000001 S: 7338385 Res: 30 | | E: 623415 W: 384884.99999999 Res: 30 | | Range of data: min = 0 max = 194.52 | | | | Data Description: | | generated by i.landsat.toar | | | | Comments: | | Reflectance of Landsat-5 TM (method corrected) | | ---------------------------------------------------------------- | | Acquisition date ...................... 2005-05-15 | | Production date ....................... 2012-12-01 | | | | Earth-sun distance (d) ................ -0.00000000 | | Digital number (DN) range ............. 0 to 0 | | Calibration constants (Lmin to Lmax) .. +0.000 to +0.000 | | DN to Radiance (gain and bias) ........ -0.00000 and +0.00000 | | Mean solar irradiance (ESUN) .......... -0.000 | | Reflectance = Radiance divided by ..... -0.00000 | | ----------------------------------------------------------------- | | | | i.landsat.toar -r input_prefix="tm5_2005_orig." output_prefix="rad20\ | | 05_cor." metfile="C:\projetos\agspec\correcao_landsat\LT521807620051\ | | 35CUB00\LT52180762005135CUB00_MTL.txt" sensor="tm5" method="correcte\ | | d" date="2005-05-15" sun_elevation=37.184 product_date="2012-12-01" \ | | percent=0.01 pixel=1000 rayleigh=0.0 | | | +----------------------------------------------------------------------------+ Thanks Daniel
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