Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-01-28
Astronomy & Astrophysics, 356, 357-362 (2000)
Astronomy and Astrophysics
Astrophysics
Accepted for publication in Astronomy & Astrophysics, Main Journal, 6 pages, 4 figures
Scientific paper
Global Positioning System (GPS) satellites broadcast at frequencies of 1,575.42 MHz (L1) and of 1,227.60 MHz (L2). The dispersive property of the ionosphere can be used to combine independent measurements at the two frequencies to estimate the total electron content (TEC) between a GPS receiver site and a broadcasting satellite. Such measurements, made at sites near to Very Long Baseline Interferometry (VLBI) sites, can be used to estimate the ionospheric contribution to VLBI observables. For our 1991.9 astrometric VLBI experiment in which we obtained group-delay observations in the 8.4 and 2.3 GHz bands simultaneously, we found that the GPS and VLBI determinations of the ionosphere delays agreed with root-mean-square differences below 0.15 ns for intercontinental baselines and 0.10 ns for continental ones. We also successfully applied the GPS-based procedure to reduce the ionospheric effect in phase delays used for high precision differenced astrometry at 8.4 GHz for this same experiment.
Guirado Jose C.
Marcaide Juan Maria
Ros Eduardo
Sardon Esther
Shapiro Irwin I.
No associations
LandOfFree
A GPS-based method to model the plasma effects in VLBI observations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A GPS-based method to model the plasma effects in VLBI observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A GPS-based method to model the plasma effects in VLBI observations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-336063