AMCS Antenna Rotation Test Victoria Andreatta & Chuck Meertens DRAFT - June 11, 2001 Summary An antenna test was conducted at UNAVCO in order to determine the effect of antenna rotation on carrier phase observations, a possible concern for the... Read More

Antenna and Multipath Calibration System for High-accuracy Geophysical Application of GPS K.D. Park, J.L. Davis, P. Elosegui, P.O.J. Jarlemark, J.E. Normandeau (Harvard-Smithsonian Center for Astrophysics) B.E. Corey, A.E. Niell (MIT Haystack Obs.) C... Read More

The attached memo from Jim Davis from March 29, 2001 discusses the changes made to the Igor algorithms in order to calculate the Antenna beam pattern for the parabolic antenna used in the AMCS project. Antenna Beam Pattern Calculations using Range... Read More

The attached memo from Kwan-Dong Park (Harvard-Smithsonian) discusses the effect of changing the baseline vector between the parabolic dish antenna and the choke ring antenna, and the effects on the phase residuals. Az/El-dependent AMCS Phase... Read More

Development of an antenna and multipath calibration system for Global Positioning System sites K.-D. Park(1,2), P. Elo´segui(1,3), J. L. Davis(1), P. O. J. Jarlemark(1,4), B. E. Corey(5), A. E. Niell(5), J. E. Normandeau(1,6), C. E. Meertens(7)... Read More

The attached memo discusses the geometric model of the AMCS antenna setup. This memo includes a brief description of the AMCS baseline with a Trimble choke ring antenna. This memo has a description of perfect pointing for the AMCS antenna and the... Read More

Abstract Site-specific GPS phase-measurement errors, such as antenna scattering and multipath, are cm level. These systematic errors affect the estimates of both the horizontal and vertical components of site position. The vertical errors, larger... Read More

Multipath Characteristics of GPS Signals as Determined from the Antenna and Multipath Calibration System (AMCS): Preliminary Results Citation: Elosegui, P., K. Park, J.L. Davis, J.E. Normandeau, P.O.J. Jarlemark, B.E. Corey, A.E. Niell, C.M. Meertens... Read More

Park, K., J.L. Davis, P.O.J. Jarlemark, P. Elosegui, J.E. Normandeau, B.E. Corey, A.E. Niell, C.M. Meertens, V. Andreatta, Multipath Characteristics of GPS signals as determined from the Antenna and Multipath Calibration System (AMCS), ION GPS... Read More

The attached memo discusses the re-analysis of the data that was taken on May 1-3, 2000, done by Kwan-Dong Park (post-doc, Harvard-Smithsonian). Some of the graphs in the memo have prompted a discussion as to why the SNR values for the AMCS antenna... Read More