Carrierphase tracking (surveying) Utilizing the navigation message to measure pseudorange has been discussed. Another method that is used in GPS surveying applications is carrierphase tracking. The period of the carrier frequency times the speed of light gives the wavelength, which is about 0. 19 meters for the L1 carrier. differential carrier phase tracking A Kinematic Carrier Phase Tracking System for High Precision Trajectory Determination Dr. Wang Tang, Mr. Dale Turle y& Mr. Gene Howell ARINC Research Corporation The accuracy of differential GPS, usually on the order of 1 to 5 meters, is considered marginal to meet the
RTK uses carrierphase tracking of GPS signals measured by a reference and a remote receiver to generate accuracies of 1 part in 100, 000 to 1 part in 750, 000 (in practice, this means within centimeters) with relatively brief observations of only one to two minutes differential carrier phase tracking
A Technique for Determining the Carrier Phase Differences between Independent GPS Receivers during Scintillation Shan Mohiuddin, Todd E. Humphreys, and Mark L. Psiaki Cornell University BIOGRAPHY Shan Mohiuddin is a graduate student in Mechanical and using carrier phase differential GPS (CDGPS) techniques Differential Carrier Phase Navigation Systems Using Decentralized Estimation. Steven E. Langel, Samer M. Khanafseh, FangCheng Chan, and Boris S. Pervan low rateGPS differential code and carrier phase measurements to estimate the deviation of the true state used to directly aid the GPS receiver tracking loops. A Validate carrierphase multipath theory Validation of the currently published theoretical models against bench data Compare carrierphase multipath errors between standard and narrow correlators Compare effects of coherent and noncoherent code tracking on carrierphase multipath errors differential carrier phase tracking Carrier Phase vs. Code Phase 100 meter accuracy can improve to between 5 meters and submeter depending on the data collection technique and the data receiver used. Differential correction is a data collection technique that removes errors in GPS data created by selective availability and other factors. With the recent development of Carrier Phase Differential GPS (CDGPS) technology, a single inexpensive GPS receiver can measure a vehicles position to within a few centimeters and heading to within 0. 1. The ability to provide accurate realtime information about multiple vehicle states makes CDGPS ideal for automatic control of vehicles. 13. Differential GPS (Carrier Phase Tracking) [ CDGPS RTKDGPS GPS. Resolving this carrier phase ambiguity for just a few cycles is a much more tractable problem and as the computers inside the receivers get smarter and smarter it's becoming possible to make this kind of measurement without all the ritual that surveyors go through.