Method for Recognising Hot Targets on the Earth
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Abstract
A method for detecting a hot target on the Earth by a satellite is disclosed. The satellite includes a sensor for acquiring data in spectral channels in the IR spectrum, and a navigation system for detecting position and orientation data of the satellite. The method includes the steps of subjecting the acquired data to a system correction by radiometric and geometric calibration files stored on the satellite; detecting a hot target on board from the system-corrected data by multi-channel thresholding; geo-referencing the hot target by the position and orientation data of the satellite and the geometric calibration files; temporarily storing the geo-referenced hot target on the satellite; and transmitting the temporarily stored hot target by a transmitting unit to a receiving unit on the Earth.
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Citations
20 Claims
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1-10. -10. (canceled)
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11. A method for detecting a hot target on the Earth by means of a satellite, the satellite comprising a sensor for acquiring data in various spectral channels in the IR (infrared) spectrum, an on-board navigation system for detecting position and orientation data of the satellite, and a transmitting unit for transmitting data to a receiving unit on the Earth, the method comprising the steps of:
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acquiring, by the sensor of the satellite, data related to a surface of the Earth in the various spectral channels;
subjecting the acquired data to a system correction using radiometric and geometric calibration files stored on the satellite;
detecting a hot target on board the satellite from the system-corrected data using multi-channel thresholding;
geo-referencing the detected hot target on the basis of the position and orientation data of the satellite and the geometric calibration files;
temporarily storing the geo-referenced detected hot target on the satellite;
transmitting the temporarily stored hot target by the transmitting unit; and
receiving, demodulating, decoding and graphically displaying the transmitted hot target in the receiving unit, the receiving unit integrating geographic longitude and latitude of an instantaneous location of the receiving unit into the graphic display of the transmitted hot target. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A satellite for detecting a hot target on the Earth, comprising:
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a sensor for acquiring data from a surface of the Earth in various spectral channels in the IR spectrum;
on-board radiometric and geometric calibration files;
an on-board navigation system for detecting position and orientation data of the satellite;
an on-board evaluation unit connected to the sensor, the radiometric and geometric calibration files, and the navigation system;
a mass storage device connected to the evaluation unit; and
a transmitting unit connected to the mass storage device, wherein the evaluation unit is configured to perform a system correction of the acquired data using the radiometric and geometric calibration files, to detect a hot target on board from the system-corrected data by multi-channel thresholding, and to geo-reference the detected hot target on the basis of the position and orientation data of the satellite and the geometric calibration files, wherein the mass storage device is configured to temporarily store the geo-referenced detected hot target, and wherein the transmitting unit is configured to transmit in succession the temporarily stored hot target as a modulated HF signal to the Earth.
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20. A receiving unit for receiving data from a satellite, the receiving unit comprising:
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a portable GPS receiver;
a HF receiver for receiving HF signals of the satellite indicating detection of a hot target on a surface of the Earth;
a decoder for decoding HF signals received by the HF receiver; and
an interface for a digital map software of the GPS receiver.
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Specification