| Type |
Conference Paper |
| Names |
Lou Nigra, B. M. Lewis, C. E. Edgar, P. Perillat, L. Quintero, S. Stanimirovic, J. S. Gallagher |
| Proceedings Title |
Bulletin of the American Astronomical Society |
| Conference Name |
American Astronomical Society, AAS Meeting #217, #433.13 |
| Volume |
43 |
| Date |
January 1, 2011 |
| URL |
http://adsabs.harvard.edu/abs/2011AAS...21743313N |
| Library Catalog |
NASA ADS |
| Abstract |
We present a concept, developed at the National Astronomy and Ionosphere
Center (NAIC) at Arecibo, Puerto Rico, for suppression of Global
Positioning System (GPS) signals in the 305 m dish radio receiver path
prior to backend processing. The subsystem does not require an auxiliary
antenna and is intended for easy integration with radio telescope
systems with a goal of being a turnkey addition to virtually any
facility. We have focused on detection and cancellation of the GPS L3
signal at 1381.05 MHz which, during periodic test modes and particularly
during system-wide tests, interfere with observations of objects in a
range of redshifts that includes the Coma supercluster, for example. The
signal can dynamically change modulation modes and our scheme has
demonstrated, through simulations using actual sampled telescope data,
the ability to acquire and track these signals as well as detect the
mode changes in order to apply cancellation or blanking, as appropriate.
The subsystem can also be adapted to GPS L1 (1575.42 MHz), L2C (1227.6
MHz), and others. A follow-up is underway to develop a prototype to
deploy and evaluate at NAIC. |