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IVS Special Analysis Center
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| U.S. Naval Observatory | Astrometry Department |
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IVS Special Analysis Center
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The Analysis Center for Source Structure is supported and operated by the United States Naval Observatory (USNO). The main mission of the Analysis Center is to analyze VLBI data to extract intrinsic source structure information for use in maintaining the International Celestial Reference Frame (ICRF). Source structure information is provided in the form of synthesis images and source models suitable for evaluating sources for astrometric and/or geodetic use and for long-term monitoring of sources. Research into the effects of source structure on astrometric position determination is also carried out with emphasis on improving the long-term stability of the ICRF. The web server for the Analysis Center is provided by the USNO. |
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Our primary product is the Radio Reference Frame Image Database which holds information on the radio frequency intrinsic structure of most ICRF sources with declination greater than -30 degrees. Both the raw data and processed images (with their associated source models) can be obtained from this site.
Dr. Roopesh Ojha, Dr. Ralph A. Gaume, & Dr. Kerry A. Kingham |
Future ActivitiesThe Analysis Center currently has a program of active research investigating the effects of intrinsic source structure on astrometric position determination. Results of this program are published in the scientific literature.
The following activities for 2010 are planned:
- Continue structure analysis of RDV experiments.
- Continue imaging and analysis of VLBA RDV experiments.
- Continue imaging and analysis of VLBA high frequency experiments.
- Make additional astrometric and imaging observations in the Southern Hemisphere in collaboration with ATNF partners.
- Evaluate source structure in terms of it's effects on the stability of ICRF2.
| Last modified: Tue Dec 29 09:35:57 EST 2009 | Send comments to afey@usno.navy.mil. |