LRPT Processor
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LRPT Image Processor

Program to add enhancements to Meteor-M N2 images.  You may also like my LRPT reception page which shows the signal structure, and my Automating LRPT reception page which gives some hints on using MeteorGIS.  You might also like to try my Meteor Mapping program to add an approximate overlay on the screen to images from the LRPT Decoder software.


Download the LrptImageProcessor V2020.02.23.40 (1,156,097 bytes; 2020-Feb-23)
      MD5 signature: 48F2210EDC93DC2AEB5C4C4E9B36E9E5


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.  It has also worked on Linux/WINE!  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.  If the optional second command-line parameter "-close" is present, the program closes after saving the images.

The program has been developed in Embarcadero's Delphi using Windows-8.1 and Windows-10.

Feedback to the GEO-Subscribers self-help group, please -

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

Saying thanks

If you use and like this software, please consider saying "thank you" with a donation. You can make a donation by sending me an Amazon Gift Certificate here:

My e-mail for Amazon is:

Please note that this MUST be sent to the UK branch of Amazon.

Should you prefer to use PayPal, I am:

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.



Accept "-close" second command-line parameter to exit after processing a file.



Narrow down range of .BMP file in the File Open dialog to avoid displaying already processed files.
Alter dialog to distinguish RGB and per-channel files.
Experimental Day/Night mode.
Key ESC closes the program.
Use yyyy-mm-dd-rev version numbering.



Add overlays, including station names.  Shift with the cursor keys.  Saved with images.
Support 123 files in addition to 122 and 125 files.
Add experimental day/night mode (not yet fully implemented).
Many minor updates, see the LrptImageProcessor.txt file for more details. 


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: 2020 Feb 23 at 07:21