Method and apparatus for interferometric radar measurement
First Claim
1. A method for interferometric radar measurement in which at least two side looking RADAR systems, mounted on satellite and/or missile-supported platforms, wherein illuminate a common surface area by means of microwave signals;
- wherein;
a first side looking RADAR system sends a first radar signal in a range around a first transmit side looking RADAR frequency;
at least a second side looking RADAR system sends at least a second radar signal on at least a second transmit frequency; and
at least one of the at least two side looking RADAR systems receives at least two interfering radar signals reflected on the common surface area, and based thereon determines difference phases of the received radar signals by forming interferograms, determines a drift of a system clock of the at least two SAR systems from the difference phases, and compensates the determined drift.
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Accused Products
Abstract
In a method for interferometric radar measurement, at least two synthetic aperture radar (SAR) systems on satellite and/or missile-supported platforms illuminate a common surface area by means of microwave signals. A first SAR system sends a first radar signal on a first transmit frequency, and at least a second SAR system sends at least a second radar signal on at least a second transmit frequency. At least one of the at least two SAR systems receives the at least two interfering radar signals reflected on the common surface area, determines difference phases of the received radar signals from the interferograms, determines therefrom a drift of a system clock of the at least two SAR systems, and compensates the determined drift.
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Citations
16 Claims
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1. A method for interferometric radar measurement in which at least two side looking RADAR systems, mounted on satellite and/or missile-supported platforms, wherein illuminate a common surface area by means of microwave signals;
- wherein;
a first side looking RADAR system sends a first radar signal in a range around a first transmit side looking RADAR frequency;
at least a second side looking RADAR system sends at least a second radar signal on at least a second transmit frequency; and
at least one of the at least two side looking RADAR systems receives at least two interfering radar signals reflected on the common surface area, and based thereon determines difference phases of the received radar signals by forming interferograms, determines a drift of a system clock of the at least two SAR systems from the difference phases, and compensates the determined drift. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- wherein;
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8. A system for the interferometric radar measurement having at least two side looking RADAR systems on satellite- and/or missile-supported platforms which illuminate a common surface area by means of microwave signals, including a first side looking RADAR system which can send a first radar signal around a first transmit center frequency, and at least a second side looking RADAR system which can send at least a second radar signal around at least a second transmit center frequency;
- wherein;
at least one of the at least two side looking RADAR systems is constructed for receiving at least two interfering radar signals reflected on the common surface area, for determining, based on said interfering radar signals, difference phases of the received radar signals by forming the interferograms. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
- wherein;
Specification