VLBI Antenna Calibration via GPS

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$99,763.00
Award Year:
2010
Program:
SBIR
Phase:
Phase I
Contract:
NNX10CD70P
Award Id:
95430
Agency Tracking Number:
094851
Solicitation Year:
n/a
Solicitation Topic Code:
S1
Solicitation Number:
n/a
Small Business Information
7257D Hanover Parkway, Greenbelt, MD, 20770
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
541634518
Principal Investigator:
DanielMacMillan
Principal Investigator
(301) 614-6118
Daniel.MacMillan@nviinc.com
Business Contact:
JohnGipson
Business Official
(301) 614-6876
John.Gipson@nviinc.com
Research Institute:
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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