[daip] Question about LOCIT

Dayton Jones Dayton.L.Jones at jpl.nasa.gov
Wed Nov 8 11:20:01 EST 2006


Hi.  Thanks to Eric we now have a version of LOCIT that runs 
without complaint on the single-polarization from our JPL test 
interferometer.  However, I now have a question about interpreting 
the results.  The expected errors in our interferometer baselines 
are several cm (possibly as large as a few tens of cm).  LOCIT 
produces antenna position corrections that are sub-cm, with sub-cm 
uncertainties.  It seems implausible that the true antenna position 
correction could be so small.  Is there an implicit assumption in 
LOCIT that the a priori antenna positions are known to less than 
one wavelength (about 4 cm in our case)?  
Cheers, 
        Dayton




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