VLBI Antenna Calibration via GPS

Award Information
Agency:
National Aeronautics and Space Administration
Amount:
$99,763.00
Program:
SBIR
Contract:
NNX10CD70P
Solitcitation Year:
2009
Solicitation Number:
N/A
Branch:
N/A
Award Year:
2010
Phase:
Phase I
Agency Tracking Number:
094851
Solicitation Topic Code:
S1.10
Small Business Information
NVI, Inc.
7257D Hanover Parkway, Greenbelt, MD, 20770-3612
Hubzone Owned:
N
Woman Owned:
N
Socially and Economically Disadvantaged:
N
Duns:
541634518
Principal Investigator
 Daniel MacMillan
 Principal Investigator
 (301) 614-6118
 Daniel.MacMillan@nviinc.com
Business Contact
 John Gipson
Title: Business Official
Phone: (301) 614-6876
Email: John.Gipson@nviinc.com
Research Institution
N/A
Abstract
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.

* information listed above is at the time of submission.

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