SDR Mobile for Android now available in Google Play!

SDR MakerSpace Android mobile application is finally publicly available in Google Play store.

If you haven’t heard anything about the app, or would like to know more about the project, I invite you to read our announcement of the project in cooperation with Libre Space Foundation and European Space Agency (ESA).

From now on you can easily get satellite images just by using the dedicated mobile app. We remind you that to get those images you need to have a VHF antenna, SDR (HackRF) and optional filter and powerbank.

You can download the app here:

Get it on Google Play

How the app works

To start your journey with hunting satellites you can follow our How To. Below you can see three steps of signal capturing, decoding and resutls viewing.

Capture the signal

First thing you see after launching SDR Mobile is this signal capture screen:

SDR-mobile-capture

Select your satellite from the dropdown menu and push the “RX Start” button. If the satellite is in range and signal reception is fine, you’ll hear distinctive tic-toc sound and see a bump in the center of FFT plot:

SDR-mobile-capture

You can now start recording (REC Start button). Typical NOAA pass lasts ~15 minutes, keep tracking the satellite until the signal is gone and press REC Stop button.

Decode the signal

Ok, you have the signal recorded, time to decode it. Go to “Decode” tab, select the recorded file you want to decode and push the “Decode” button:

SDR-mobile-decode

Browse captured satellite passes

Once the decoding is finished go to “Browse” tab to see the image. The image will open in your file/image browser. You can also download the image to your PC (path on my system: /Android/data/space.sdrmaker.sdrmobile/files).

SDR-mobile-decode

Good luck with hunting! And dont’ forget to let us know how it went :).

Technology and development

As mentioned in the last blog post the whole project is open source and you can find it’s source codes at SDR Mobile.

Like most new Android mobile applications, SDR Mobile is written in Kotlin programming language. All DSP components, like FIR filters, FM and AM demodulators etc., have been implemented from scratch and you can easily use them in your project. Just add SDR Mobile as a library in your Gradle project. You can find API documentation here: librespacefoundation.gitlab.io.

If you’d like to know more about the project, reach out and let us know hi@teonite.com