The Antenna and Multipath Calibration System

The AMCS Project Home

The AMCS (Antenna and Multipath Calibration System) involves investigators from the Harvard-Smithsonian Center for Astrophysics, the MIT Haystack Observatory, and UNAVCO. We are developing the AMCS as part of a "Global Positioning System (GPS) calibration system" effort to characterize site-specific GPS phase-measurement errors, such as antenna scattering and multipath, at a level of 1 mm. This level represents an improvement in accuracy of one order of magnitude.

The AMCS system consists of a high-gain, fully-steerable, "multipath-free", paraboloid antenna, two GPS receivers, and a short-baseline to a GPS geodetic antenna to be calibrated for multipath, scattering, and phase-center variations. The AMCS begun in 1998.

This project is supported by the National Science Foundation.

For further information contact:

Dr. Pedro Elosegui
Harvard-Smithsonian Center for Astrophysics
60 Garden St, MS 42
Cambridge, MA 02138-1516
(617) 496-7645