LRPT Processor
Home Page Up ATOVS Reader AVHRR Manager BUFR Viewer CHLO Viewer CMA Viewer DDE/SDR# add-on DWDsat HRPT Viewer GeoSatSignal GRIB Viewer Ground Map HDF Viewer HRPT Reader HRPT samples Kepler Manager LRPT Processor Metop LSA Viewer Metop Manager MODIS L1 viewer MSG Data Manager NOAA HDF Viewer SatSignal Sea-Ice & SST Viewer WXtrack


LRPT Image Processor

Program to add enhancements to Meteor-M N2 images.


Download the LrptImageProcessor V1.2.5.13 (471,687 bytes; 2016-Feb-15)
      MD5 signature: 48B3305E05A8AE62DA9AF88A62411722


Extract all the files in the Zip archive to a directory /outside/ the C:\Program Files\ tree.  I suggest C:\Tools\SatSignal\LRPTprocessor\  The program has been developed under Windows 8 & 10 but I would expect it to run on Windows-XP.  Operation on earlier than Windows-7 is neither guaranteed nor supported.  The program requires my Runtime Library Bundle to be installed, if you don't already have it (not required should you already have the MSG Data Manager installed).


The program can remove the edge compression present in the raw scan data from the Meteor-M N2 LRPT data, create a vegetation image, thermal image, and a false-colour image. The thermal components rely on you saving a 1-2-5 image from the decoder program. In the LRPT offline decoder:

Red => channel 1, 0.5 - 0.7 Ám
Green => channel 2, 0.7 - 1.1 Ám
Blue => channel 5, 10.5 - 11.5 Ám

You can feed the program with a image (BMP or JPG) named on the command-line, or use drag-and-drop from File Explorer onto the open program, or use the File|Open menu.  Output images are automatically saved as JPG or BMP in the same directory as the input image.

The program has been developed in Embarcadero's Delphi using Windows-8.1, and I would expect the program to work on Windows XP SP3 and later.  Windows-XP/64 and Vista/64 may not work as expected.  It will also work in Linux/WINE!

Feedback to the GEO-Subscribers Yahoo group, please -

There is a page of LRPT reception screenshots using SDR# and QPSK 1.4+ here.

Release Notes



Make remapped image display first
Make remapped image auto-centre
Fit to window, left click image to toggle
Adjustable histogram equalisation for infra-red image, right-click the image to change
Add image hints
Add flip-vertically option for northbound passes
Add Help, About menu



Add version number to caption
Rename .exe to LrptImageProcessor



Add sharpening & histogram options for false-colour image
Add File|Open menu
Add Option|CLUT menu ..
.. rename default colour lookup table to ..
.. CLUT_1_TempToColourHLS.bmp
.. all CLUTs must be named CLUT_<name>.bmp
.. CLUTs must be 256 x 256 24-bit RGB bitmaps
.. be aware that PhotoShop produces broken .BMP files
Handle drop to program's icon
Improved image centre behaviour on reprocess



Add classic RGB124 image
Warn if no suitable colour lookup tables found
Replace flip by rotate 180



Make geometry correction optional



Add RGB 122 image
Add setup dialog ..
.. choice of which images to save
.. choice of save format (BMP/JPG/as-input)
.. move geometry correction choice from main menu



Revised video-to-temperature calculation ..
.. is improved but still very approximate
.. colours will be different
.. nearer to SatSignal colours
.. approximate temperature displayed in status line
Restore ..
.. histogram equalisation and sharpening options
.. accidentally broken in previous release



Add setup option to crispen the saved remapped image



Handle very cold IR data better in False Colour



Add IR negative image option (right-click)



Use mouse wheel to scroll image, shift-wheel to scroll horizontally.



Change mouse wheel scroll direction.


Source image

RGB 124 image - a classic combination


Vegetation image - more green is more vegetated

Infra-red image - black is hot

False-colour image - distinguish low & high cloud


Copyright © David Taylor, Edinburgh   Last modified: 2016 Feb 15 at 09:48