Relative position measuring techniques using both GPS and GLONASS carrier phase measurements
First Claim
1. A method of determining relative position information of at least two locations, comprising:
- receiving signals at each of said at least two locations over a common time period from a plurality of satellites including at least one GLONASS satellite, andprocessing said received signals from each of said plurality of satellites, by a method that includes;
forming a metric that depends upon values of the relative position information of at least one of said at least two locations and upon carrier phase measurements of the signals received from said plurality of satellites; and
determining the relative position information of said at least two locations by determining the values of the relative position information that optimizes said metric.
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0 Petitions
Accused Products
Abstract
A technique of accurately determining the relative position of two points using carrier phase information from receivers capable of making code and carrier phase measurements on the L1 and L2 frequencies of signals from either or both GPS and GLONASS satellites. These signals are processed by a receiving system to determine relative position, for the purpose of surveying or otherwise, with the accuracy of carrier phase measurements being obtained. Signal processing similar to that used in existing GPS carrier phase based relative positioning receivers is used with GLONASS signals as well, with a modification that takes into account the unique and different frequencies of the signals from individual GLONASS satellites. Surface acoustic wave ("SAW") filters are also employed in an intermediate frequency receiver section in order to avoid imparting different delays to the GLONASS signals of different frequencies.
112 Citations
65 Claims
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1. A method of determining relative position information of at least two locations, comprising:
- receiving signals at each of said at least two locations over a common time period from a plurality of satellites including at least one GLONASS satellite, and
processing said received signals from each of said plurality of satellites, by a method that includes; forming a metric that depends upon values of the relative position information of at least one of said at least two locations and upon carrier phase measurements of the signals received from said plurality of satellites; and determining the relative position information of said at least two locations by determining the values of the relative position information that optimizes said metric. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 56, 57, 58, 59)
- receiving signals at each of said at least two locations over a common time period from a plurality of satellites including at least one GLONASS satellite, and
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43. A satellite signal receiving system for determining relative position information of at least first and second locations, comprising:
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first and second receivers having respective first and second antennas positionable at respective ones of said at least first and second locations, and a signal processor including means responsive to receipt by said receivers of signals from a plurality of satellites over a common time period including at least one GLONASS satellite for forming a metric that depends upon values of the relative position information of at least one of said at least two locations and upon carrier phase measurements of the signals received from said plurality of satellites, and means for determining the values of the relative position information that optimize said metric, thereby to determine the relative position information of said at least two locations. - View Dependent Claims (44, 45, 46, 47, 48, 49, 60, 61, 62, 63)
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50. A satellite signal receiving system for determining relative position information of at least first and second locations, comprising:
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first and second receivers having respective first and second antennas positionable at respective said first and second locations, each of said receivers including means capable of receiving signals within a frequency band of both GLONASS satellite and GPS satellite signals for providing digital data of received GLONASS and GPS signals, and a signal processor receiving the GLONASS and GPS digital data that forms therefrom a plurality of double difference phase relationships of carriers of received GLONASS and GPS signals with terms of clock offsets of the first and second receivers and integer ambiguities, solves said double difference phase relationships for fixed value integers, and determines said relative position information by use of the fixed value integers. - View Dependent Claims (51, 64)
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52. A satellite signal receiving system for determining relative position information of at least first and second locations, comprising:
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first and second receivers having respective first and second antennas positionable at respective said first and second locations, each of said receivers including; a first section tuned to receive signals within a frequency band of GLONASS satellite signals and provide digital data of received GLONASS signals, and a second section tuned to receive signals of GPS satellites and provide digital data of received GPS signals, and a signal processor receiving the GLONASS and GPS digital data that forms therefrom a plurality of double difference phase relationships of carriers of received GLONASS and GPS signals with terms of clock offsets of the first and second receivers and integer ambiguities, solves said double difference phase relationships for fixed value integers, and determines said relative position information by use of the fixed value integers.
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53. A receiver of positioning system satellite signals, comprising:
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a first section tuned to receive signals within a frequency band of GLONASS satellite signals and provide digital data of received GLONASS signals while maintaining their individual frequency characteristics, a second section tuned to receive signals of GPS satellites and provide digital data of received GPS signals while maintaining their individual frequency characteristics, and a signal processor receiving the digital data of both of the received GLONASS and GPS signals for providing data of observables of individual ones of both GLONASS and GPS signals including carrier phase. - View Dependent Claims (54, 55, 65)
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Specification