WE PROPOSE TO INVESTIGATE AND DEVELOP AN INEXPENSIVE SYSTEM TO DETERMINE: 1)VLBI ANTENNA PROPERTIES SUCH AS…
Award details are derived from public USAspending.gov records. Not a bid recommendation.
Award details
- Award ID
- NNX10CD70P
- Contractor
- Awarding agency
- National Aeronautics and Space Administration
- Sub-agency / office
- National Aeronautics and Space Administration
- Award amount
- $0
- Period of performance
- Jan 29, 2010 – Jul 29, 2010
- NAICS
- 541712 — Research and Development in the Physical, Engineering, and Life Sciences
- PSC
- PSC AR11
- Place of performance
- MD
Public award description
WE PROPOSE TO INVESTIGATE AND DEVELOP AN INEXPENSIVE SYSTEM TO DETERMINE: 1)VLBI ANTENNA PROPERTIES SUCH AS AXIS-OFFSET, NON-INTERSECTION OF AXIS AND ANTENNA REFERENCE POINT; 2) GRAVITATIONAL AND/OR THERMAL DEFORMATION; 3) THE ECCENTRICITY VECTOR FROM THE VLBI ANTENNA TO NEARBY GPS RECEIVERS. THE PROPOSED SYSTEM INVOLVES USING SEVERAL GPS RECEIVERS IN CLOSE PROXIMITY DRIVEN BY A COMMON CLOCK. BECAUSE OF THEIR PROXIMITY, ATMOSPHERE AND IONOSPHERE ERRORS ARE COMMON, AND VANISH WHEN WE TAKE THE DIFFERENCE OF MEASUREMENTS FROM DIFFERENT RECEIVERS TO A COMMON A SATELLITE. SATELLITE CLOCK ERRORS ALSO VANISH IN THIS DIFFERENCE. SINCE THE RECEIVERS USE A COMMON CLOCK, RECEIVER CLOCK ERROR ALSO VANISHES. THE REMAINING ERROR SOURCE IS GPS MULTIPATH WHICH CAN BE MITIGATED.
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