I hope this demonstrates that RTL SDR devices do have practical applications. You can now clearly see the landmass and the clouds, as well as the reflection of the Sun on the surface of the ocean. Below I have a “HVC false color” image where I have also applied histogram equalization: Wxtoimg can combine the different images to create various false color images. On the image above we see the infrared image on the left and visible light on the right. Often, one channel will contain a visible light image and the other will contain and infrared image. This is the image decoded by wxtoimg with the “contrast enhancement” option:ĪPT transmissions from the NOAA weather satellites contain two channels that are basically two images from two different instruments. If you can make it work on your Linux box, it will provide you with many options for processing and enhancing the received APT images. I guess that will no longer be possible if I use SDRuno I guess my next question is the choice of radio sofware.
Wxtoimg rtl sdr free#
Wxtoimg is a commercial APT decoder, however, it comes with a limited free version. previously my setup had used Orbitron tracking data to frequency control the SDR. The image was captured during a late afternoon pass, which is a good time for APT reception, because we can often see shadows beneath the clouds, giving the image a sense of 3D. Here is what I got from the recording of the NOAA-15 pass: It can decode the image but I have problems getting false color and temperature to work. The easiest and fastest way to resample the audio is using sox: sox input.wav output.wav rate 11025Ītpdec (probably misspelled version of aptdec) is an open source APT decoder which is no longer maintained.
Wxtoimg rtl sdr driver#
I suspect the recent gain improvements in the driver have something to do with it. This image was taken using a 2m ground-plane antenna (19 inch vertical, four 19 inch long horizontal radials), mounted in an attic, and about 25 feet of RG-8X ('radio' was V3 dongle, computer was a Pi 3): And there are plenty of better images, as well. Find your MCEcontrol.exe location (usually in C:Program Files (x86)Kindel SystemsMCE Controller) Go to that folder and create a new file named mands. MCE will recognize the commands sent by WxToImg and start rtlfm and sox. Lets start with a video showing Gqrx receiving the APT transmission from the NOAA-15 polar orbiting weather satellite during orbit 73676 over western Europe:Īs you can see both the baseband and the audio SNR is rather good. Create a file for MCE controller commands. Today, I tried to repeat the procedure using my ezcap eztv666 rtlsdr dongle with very good results.
Wxtoimg rtl sdr how to#
About a year ago I posted a step-by-step guide about how to receive NOAA APT weather satellite images using Gqrx SDR and the Funcube Dongle.
Wxtoimg rtl sdr install#
png) at /var/www/html/sat//Īpt-get install php5 libapache2-mod-php5 php5-mcrypt
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