tailieunhanh - Kinematic GPS: resolving integer ambiguities on the fly

This paper pro -poses two ideas for adapting standard kinematic techniques to situations that do not naturally allow for the constraint of a fixed baseline. The first calls for extracting the information needed to resolve the integer ambiguity from the very data collected while the kinematic survey is in progress. The second idea addresses the use of the antenna exchange technique for mobile platforms where the original locations of the antennas are not likely to remain stationary during the physical exchange. Both ideas count on information from additional measurements to aug- ment their respective measurement models. | KINEMATIC GPS RESOLVING INTEGER AMBIGUITIES ON THE FLY Patrick . Hwang Rockwell International Corporation Avionics Group Cedar Rapids IA 52498 ABSTRACT In kinematic GPS the initial integer ambiguity must be resolved either by a static survey over time or by instant calibration with a known baseline or an antenna exchange. While these standard methods require maintaining a baseline stationary to an earth-fixed reference frame during the initialization there are situations when at least one of the receivers may be constantly in motion. This paper proposes two ideas for adapting standard kinematic techniques to situations that do not naturally allow for the constraint of a fixed baseline. The first calls for extracting the information needed to resolve the integer ambiguity from the very data collected while the kinematic survey is in progress. The second idea addresses the use of the antenna exchange technique for mobile platforms where the original locations of the antennas are not likely to remain stationary during the physical exchange. Both ideas count on information from additional measurements to augment their respective measurement models. INTRODUCTION For the past decade of GPS development significant advancements made in receiver and systems technologies have improved the practicality and applicability of carrier phase methodologies. Today these methodologies show potential usefulness beyond their surveying roots. Several key breakthroughs were especially significant in the evolution of the contributing technologies particularly the conception of kinematic surveying 1 . In kinematic GPS surveying it is generally recognized that regardless of how the survey is actually conducted the initial integer ambiguity must be resolved by choosing any one of three standard methods depending on the circumstances constraining the survey 1 performing a static survey 2 using the antenna exchange technique or 3 calibrating with a known baseline. These methods all involve

• Điện - Điện tử
• Kinematic GPS
• Resolving integer ambiguities on the fly
• Perspective on carrier phase measurement models
• Kinematic Surveying
• Generalization to Real Life GPS Models
• Kinematic on the fly
• Forest inventory
• Global positioning system
• Real time measurements
• Kinematic method
• Differential GPS
• Earth Sciences
• Landslide monitoring
• Dynamic Kalman filtering
• Bernese V5
• 0 software
• Kinematic model