Planetary Radio Confusion Tool


IR HST image
(Erich Karkoschka)

IR JWST image

This is a tool set up to help Mike Klein and his students investigate the effects of confusing sources on radio wavelength observations of the planets, both past and current. The old observations were mostly done by Mike with the JPL DSN 70-m antenna (DSS14), while the newer ones are done by the students using the Goldstone Apple Valley Radio Telescope (GAVRT). More details for the observations of Uranus can be found in Mike's 2002 DPS talk.

This tool uses the source list from the NRAO VLA Sky Survey (NVSS) to determine what background sources might be near the planet at some past time when it was observed. The position of the planet at any given time is retrieved from the JPL Horizons ephemeris. Given that position, the tool calculates the increase in received flux density from the background sources, and from that calculates a correction to the estimated brightness temperature of the planet. There are some caveats to the use of the numbers produced when running this tool:

But it should give a first cut at the corrections to be applied to single dish radio wavelength planetary observations. Just fill in the form below and off you go!



     Year        Month        Day        UT Hour (including fraction)  

     Frequency (MHz)  

     Antenna diameter (m)  

     Search radius          Units:    

     Minimum flux density          units:    



Bryan Butler
Email: bbutler at nrao dot edu
Snail mail:
     800 Bradbury SE Suite 235
     Albuquerque, NM    87106
Phone: 505-925-1239

Last Modified on 2023-Apr-12