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This is revealed by clicking the Parameters option on the Menu Bar then selecting the topmost option 'Decoding' To produce the optimum result, you must make adjustments to WXSat's Parameter Window, illustrated below in figure 2.

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It will probably be too dark, and lack a full range of tones. If all goes well, you should receive an image similar to the one in figure 1 above, which shows the two NOAA images side by side (infrared on left, visible on right).Ĭalibrating WXSat Parameters (using a saved NOAA WAV file)Īlthough you will probably obtain an image of sorts on your first attempt, it is unlikely to impress.

the file 07240854.wav was recorded starting at 08.45 am on July 24.

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The WAV files are saved with filenames derived from the PC clock, in mmddhhmm.wav format (e.g.

An image will build up on the screen, one line at a time, and the data will simultaneously be saved as a WAV file.

As soon as a NOAA APT signal is received by the soundcard, WXSat will start decoding it.

From the Recording menu, select 'Start at Subcarrier' -> 'Save Bitmap & Wave'.

This will produce both visible and IR images side by side, like the illustration below.

Load WXSat and open the Parameters menu and select item No 0, NOAA.

The program can also allowunattended capture of images and wave files, the latter being useful for future decoding and manipulation purposes.There are facilities to decode either NOAA channel individually, to decode both images side-by-side, and even to combine the two NOAA channels to produce a colour composite image (this last only during the summer half-year, when daylight levels are high). This image is saved in BMP bitmap format while the raw data can be archived as a wave (WAV) file. WXSat permits the user to produce images in real-time while the NOAA signal is being received. (In practice, any stereo audio lead with a 3.5 mm jack-plug at each end will be exactly what you require here).

Connect the audio output from your weather satellite receiver to the left channel of the sound-card, and you're ready to start. Just run the WXSat259.EXE file, and it installs itself, complete with a desktop shortcut.

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Wxsat is supplied as a self-installing Windows archive file. If you have an old Windows XP computer gathering dust, this would be absolutely ideal for reception using WXSAT. Note that since WXSat is a 32-bit program, it may run on 32-bit Windows 7 and 8 systens, but will not run on 64-bit versions of these operating systems. WXSat is capable of producing APT images of considerable clarity and detail from NOAA satellites, and thesoftware performs well under all versions of Windows from version 3.1 through XP. It is generally agreed that the simplest and least expensive option for processing NOAA APT data is the use ofChristian Bock's WXSat software, which uses the computer soundcard as its signal demodulator.

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Receiving Meteor M2 LRPT Creating GIS Meteor images SatSignal WxToImg WXSat Satellite FrequenciesĪ Guide to Decoding APT Weather Satellite Images Using a Sound-card and WXSat v 2.59 software