Secondary Surveillance Radar | An Introduction

Quick introduction to Secondary Surveillance Radar and how it works. After explaining the absolute basics, I am showing how one can simulate transponder responses using off-the-shelf test equipment. RTL1090 is used to verify the generated signals as valid.

If you want the arb waveform file for the 7777 Mode A response, here it is:

Please cite this article as:
Westerhold, S. (2015), "Secondary Surveillance Radar | An Introduction". Baltic Lab High Frequency Projects Blog. ISSN (Online): 2751-8140.,, (accessed: July 21, 2024).


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