The 143.050MHz Graves Radar a VHF Beacon for Amateur Radio
Radar Antenna Pattern
Moonecho's from de radar are easy to detect. Tune a SSB receiver to 143.050MHz and turn your yagi toward the moon.
An audio signal can be heard after 2,5 seconds when de Radar Beam (red spots in animated picture below) is pointing to the moon (blue spot).
Sometimes the radar beam is time shifted a few steps by the command station. This is not showed in the animation.
Here is a document with more details about the radar algorithm.
This document is also featured in DUBUS Magazine 4/2007.
Moonreflections
graves0021.jpg
graves0042.jpg
graves0043.jpg
graves0045.jpg
graves0047.jpg
graves_moonreflections (WAV)
Satellite reflections
capt0701140741.jpg
capt0702032248.jpg
Meteor Reflections
Live meteor scatter on 143.050
Links
The Graves Sourcebook
Graves Meteor Reflection Spectrogram by G7IZU
Navspasur 216.980MHz Radar
Graves Meteor Scatter
Notice the relative high count on the section 0 beam direction. It looks like that one of the beams of section 0
of one of the sectors (A or B?) is in line with an airplane traffic route.
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