Calibration and range-finding system, calibration and intersatellite range-finding method of interfermetric radiometer
A technology for intersatellite ranging and ranging systems, applied in the field of interferometric radiometers, can solve problems affecting the positioning accuracy of interferometric radiometer imaging results, noise injection methods are no longer feasible, baseline length errors, etc., to achieve inter-channel consistency Effects of correction, performance improvement, and inter-satellite ranging accuracy
Active Publication Date: 2017-07-04
NAT SPACE SCI CENT CAS
View PDF5 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] For distributed interferometric radiometers, each receiving channel is placed on a tiny satellite, and the inter-satellite distance is usually on the order of kilometers; the inter-satellite mutual coupling can be ignored, however, the traditional noise injection method is no longer feasible
In addition, in order to obtain more baseline coverage, it is necessary to rely on external forces to change the inter-satellite distance; the measurement accuracy of the inter-satellite distance is closely related to the inter-satellite time synchronization, and the inaccuracy of the inter-satellite distance will introduce the baseline length error, thus affecting the imaging of the interferometric radiometer Results and / or positioning accuracy
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0051] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0052] A calibration and ranging system of an interferometric radiometer, the system includes N subsystems, respectively placed on N satellites; as figure 1 As shown, each subsystem includes: an antenna unit, a receiver unit, a signal generator, a signal processing and control unit, and a switch; the antenna unit is used to receive / transmit calibration signals and inter-satellite ranging signals; the receiving The computer unit is used to receive the calibration signal and the inter-satellite ranging signal; the signal generator is used to generate the calibration signal and the inter-satellite ranging signal; the signal processing and control unit is used to control the signal generated by the signal generator , and process the received calibration / inter-satellite ranging signal; the switch is used to switch the system between normal...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a calibration and range-finding system of an interfermetric radiometer. The system includes N sub-systems which are separately arranged on N satellites. Each sub-system includes: an antenna unit, a receiving machine unit, a signal generator, a signal processing and controlling unit and a switching unit. The antenna unit is intended for receiving / transmitting a calibration signal and an intersatellite range-finding signal. The receiving machine unit is intended for receiving the calibration signal and the intersatellite range-finding signal. The signal generator is intended for generating a calibration signal and an intersatellite range-finding signal. The signal processing and controlling unit is intended for controlling the signal which is generated by the signal generator and processing the received calibration / intersatellite range-finding signal. The switching unit is intended for switching of the system between normal observation mode, signal calibration mode and intersatellite range-finding mode. In addition to the system, the invention also provides a calibration method and an intersatellite range-finding method of theinterfermetric radiometer.
Description
technical field [0001] The invention relates to the field of interferometric radiometers, in particular to a calibration and ranging system for an interferometric radiometer, calibration and inter-satellite ranging methods. Background technique [0002] The research on interferometric passive radio imaging technology began in 1890, when Michelson conducted microwave interference experiments using separate antennas; in 1946, Ryle and Vonberg conducted solar observations using binary radio interferometers; in 1962, Ryle further proposed to use the earth's rotation, A method to achieve more baseline coverage, thereby improving the quality of interference imaging; in 1967, the ground-based very long baseline interferometer (VLBI) was put into use; in 1986, the United States used the geostationary communication satellite TDRSS to conduct a satellite-ground radio interference experiment; in 1997, Japan The HALCA satellite was launched, and the satellite-ground interference experim...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/42H04B7/185
CPCG01S19/428H04B7/18521
Inventor 蓝爱兰阎敬业武林赵飞邓翔吴季
Owner NAT SPACE SCI CENT CAS