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The "PAN solution"
Retrieved depth
Bottom reflectance
The "PAN solution"
only uses Purple, Blue and Green against the PAN band
as illustrated in the image below,
where green pixels have been processed by the "Green solution",
and grey pixels by the "PAN solution".
The PAN soluton uses all the information contained in these four wavebands.
Water column correction: retrieved depth along Profile Blue
Performance of the PAN band reaches ~30 m over very bright bottoms
in this OIB+0.8 water type of Jerlov
Water column correction: bottom reflectance
Spectral reflectance of the brightest bottoms:
0.390 0.470 0.527 0.541 0.589 0.690 0.290
on the scale 0-1, as calibrated using the MTL textfile
This is approximately at the lowest limit for carbonate sands in a coral reef environment
Brightest bottoms are represented in shades of purple-pink
in this image of average bottom brightness
Downloads
The "PAN solution"
Retrieved depth
Bottom reflectance
The "PAN solution"
only uses Purple, Blue and Green against the PAN band
as illustrated in the image below,
where green pixels have been processed by the "Green solution",
and grey pixels by the "PAN solution".
The PAN soluton uses all the information contained in these four wavebands.
Water column correction: retrieved depth along Profile Blue
Performance of the PAN band reaches ~30 m over very bright bottoms
in this OIB+0.8 water type of Jerlov
 Retrieved depth in decimeters using purple, blue, and green against PAN |  Retrieved depth in centimetrs using purple, blue, and green against PAN |
 Deglinted TCC shows Profile_Blue
|  Retrieved depth and water column corrected reflectances along Profile Blue |
Water column correction: bottom reflectance
Spectral reflectance of the brightest bottoms:
0.390 0.470 0.527 0.541 0.589 0.690 0.290
on the scale 0-1, as calibrated using the MTL textfile
This is approximately at the lowest limit for carbonate sands in a coral reef environment
Brightest bottoms are represented in shades of purple-pink
in this image of average bottom brightness
 Color composite of water column corrected bottom reflectances for bands 3, 2 and 1 |  TCC of normalized bottom reflectance |
 NDR=(LB1-LB3)/(LB1+LB3) NormalizedDifferenceRatio
|  image B Most bottoms are quit dark in june! |
Downloads
| Download Andros July 21rst 2013 andros_20130721_result_Smoothed_20131203.zip (119 MB) from GoogleDrive |
| ReadMe.txt Image Landsat 8 LC80120442013202LGN00_MTL.txt, courtesy of the U.S. Geological Survey Modeling results using 4SM.4.17 on 20131203 by Yann MOREL, rspfsm@gmail.com NameZipFile: andros_20130721_result_Smoothed_20131203.zip It contains the following: andros_20130721_result_Zcm_Smoothed 7671*7841 16bits_signed not_swapped andros_20130721_result_NDR_Smoothed 7671*7841 16bits_signed not_swapped andros_20130721_result_WCC1_Smoothed 7671*7841 8 bits andros_20130721_result_WCC2_Smoothed 7671*7841 8 bits andros_20130721_result_WCC3_Smoothed 7671*7841 8 bits andros_20130721_result_WZ_Smoothed 7671*7841 8 bits LC80120442013202LGN00_MTL.txt This scene has 7671 rows and 7841 lines. Open the image files as raw rasters (no header, no footer, no_byte_swap). See metadata/georeferencing in textfile LC80120442013202LGN00_MTL.txt from USGS. WCC1, 2 and 3 are BOA water column corrected bands 1, 2 and 3, scaled 0-255. Zcm maps retrieved depth in centimeters. NDR maps the ratio NDR=1000*(WCC1-WCC3)/(WCC1+WCC3). WZ maps: -deep at 240 -nodata at 239 -clouds at 234 -lands at 248 -PAN solution at 4: this uses purple, blue, green and panchro bands -GREEN solution at 3: this uses purple, blue, and green bands Calibrated reflectances observed: purple blue green pan red nir swir1 Maximum shallow bottom observed: 0.3899 0.4700 0.5270 0.5413 0.5890 0.6903 0.2897 Water volume reflectance observed: 0.0519 0.0477 0.0043 0.0025 0.0009 0.0000 0.0000 Path reflectance observed: 0.0792 0.0555 0.0555 0.0511 0.0385 0.0246 0.0115 |
Command Line december 2nd 2013 nice -20 4SM -Process -Origin/USGS -DB/andros_20130721/40_3S_7S_0s/7_44/7671_7841/235.815_2673.885_0_0/1_1 -Mis/Bahamas/Andros/Landsat/OLIP/TIF/UTM_55_008/0.030_0.030/27_JUN_2013 -import/data*LC80120442013202LGN00 -LS/030000/30000/30000/30000/30000/30000/30000 @WLM0450.0/510.0/590.0/680.0/670.0/880.0/01650 @WLm0430.0/450.0/530.0/500.0/640.0/850.0/01570 -WL/0470.0/480.0/560.0/590.0/600.0/865.0/01610 -SCL001742/01869/02020/01975/02071/02466/01289 -LsM/316.3/330.2/338.7/352.3/355.9/340.5/274.5 -Lsw/088.4/064.9/034.7/031.9/022.3/011.7/010.5 @dLsw000.0/000.0/000.0/000.0/000.0/000.0/000.0 -Lw/0035.0/030.0/002.5/001.5/000.5/000.0/000.0 -Lm/0000.5/000.5/000.5/000.5/002.0/003.0/255.0 -M/@000001/@0002/00003/000004/@0005/@0006/00007 -KK2_3_0.60/Knir15.70/Bm400_BG520_GR590_RN700/mask_4 -Z/MSL0.00d/cSL1.5/N_2/NDR_43_1000_zDTM/no_mask -B/tclNe/cNorm5.0/Bmin10/cLM1 -deglint/vRbaD/GlintM90 -extract/v/rawBDH/fullBDH/NIRband7/NIRmax60/mapBPL/mBPL3 -calibrate/V/BdSMpzg/Plot_BPL/BC_6_5_4_2/BDh_12_23_24 -Model/v/runWV2/MakeClouds/mask_3 -TPsV/2/4/Text/100 -LL10 -Smooth/5/D/Smart+ |
 Calibration diagram for bands Blue, PAN, Red and NIR This image allowed me to consolidate the calibration of the PAN band in 4SM Spectral reflectance of the brightest bottoms: 0.39 0.47 0.53 0.54 0.59 0.69 0.29 on the scale 0-1, as calibrated using the MTL textfile |
| Download Andros November 10th 2013 andros_20131110_result_NotSmoothed_20131203.zip (285 MB) from GoogleDrive |
| ReadMe.txt Image Landsat 8 LC80120442013314LGN00_MTL.txt, courtesy of the U.S. Geological Survey Modeling results using 4SM.4.17 on 20131203 by Yann MOREL, rspfsm@gmail.com NameZipFile: andros_20131110_result_NotSmoothed_20131203.zip It contains the following: andros_20131110_result_Zcm_NotSmoothed 7671*7841 16bits_signed not_swapped andros_20131110_result_NDR_NotSmoothed 7671*7841 16bits_signed not_swapped andros_20131110_result_WCC1_NotSmoothed 7671*7841 8 bits andros_20131110_result_WCC2_NotSmoothed 7671*7841 8 bits andros_20131110_result_WCC3_NotSmoothed 7671*7841 8 bits andros_20131110_result_WZ_NotSmoothed 7671*7841 8 bits LC80120442013314LGN00_MTL.txt This scene has 7671 rows and 7841 lines. Open the image files as raw rasters (no header, no footer, no_byte_swap). See metadata/georeferencing in textfile LC80120442013314LGN00_MTL.txt from USGS. WCC1, 2 and 3 are BOA water column corrected bands 1, 2 and 3, scaled 0-255. Zcm maps retrieved depth in centimeters. NDR maps the ratio NDR=1000*(WCC1-WCC3)/(WCC1+WCC3). WZ maps: -deep at 240 -nodata at 239 -clouds at 234 -lands at 248 -PAN solution at 4: this uses purple, blue, green and panchro bands -GREEN solution at 3: this uses purple, blue, and green bands Calibrated reflectances observed: purple blue green pan red nir swir1 Maximum shallow bottom observed: 0.3398 0.4130 0.4927 0.5151 0.5513 0.6617 0.2727 Water volume reflectance observed: 0.0525 0.0307 0.0044 0.0158 0.0000 0.0000 0.0000 Path reflectance observed: 0.0707 0.0619 0.0412 0.0249 0.0244 0.0111 0.0018 |
 Note that the shallow vegetation is much less active in november than in june Lee Stocking Island is located in this scene |
| Command Line nice -20 4SM -Process -Origin/USGS -DB/andros_20130721/40_3S_7S_0s/7_44/7671_7841/235.815_2673.885_0_0/1_1 -Mis/Bahamas/Andros/Landsat/OLIP/TIF/UTM_55_008/0.030_0.030/27_JUN_2013 -import/data*LC80120442013202LGN00 -LS/030000/30000/30000/30000/30000/30000/30000 @WLM0450.0/510.0/590.0/680.0/670.0/880.0/01650 @WLm0430.0/450.0/530.0/500.0/640.0/850.0/01570 -WL/0470.0/480.0/560.0/590.0/610.0/865.0/01610 -SCL001742/01869/02020/01975/02071/02466/01289 -LsM/291.8/301.6/314.7/322.9/325.4/312.5/251.5 -Lsw/086.6/064.1/035.6/032.5/024.9/013.6/016.8 -dLsw005.0/005.0/003.0/004.0/004.0/004.0/000.0 -Lw/0037.0/035.2/002.5/001.5/000.0/000.0/000.0 -Lm/0000.5/000.5/000.5/000.5/002.0/003.0/255.0 -M/@000001/@0002/00003/00004/@0005/@0006/00007 -KK2_3_0.60/Knir15.70/Bm400_BG520_GR590_RN700/mask_4 -Z/MSL0.00d/cSL1.5/N_2/NDR_43_1000_zDTM/no_mask -B/tclNe/cNorm5.0/Bmin10/cLM1 -deglint/vRbaD/GlintM90 -extract/v/rawBDH/FullBDH/NIRband7/NIRmax60/mapBPL/mBPL3 /Mask_3 Eshp -Calibrate/V/BdSMpzg/Plot_BPL/BC_6_5_3_2/BDh_12_13_14 -Model/v/runWV2/mask_3 -TPsV/2/4/Text/100 -LL10 -Smooth/5/D/Smart+ |
