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Applying passive microwave sensor in geostationary earth orbit (GEO) earth observations are of special interest because it has the advantages of temporally continuous and spatially large coverage compared to the low earth orbit (LEO) systems, which provide relatively narrow swaths with a revisit time of 12 hours or more. Unfortunately the required horizontal resolution leads to a rather large antenna...
Full Polarization Interferometric Radiometer (FPIR) is concept of one dimensional synthetic radiometer. This paper introduces the design of the FPIR antenna. A novel linear array antenna is described with emphasis on the simulation of the antenna pattern, design of the stripline feeding network and simulation of the polarimetric isolation.
Geostationary interferometric microwave sounder (GIMS), which is developed by National Space Science Center of CAS, will be the main payload on board of FY-4M satellite to monitor and measure internal constitution and precipitation parameters of atmosphere cloud cluster. GIMS is an interferometric aperture synthesis radiometer. Antenna array of GIMS can obtain visibility functions of observation objects...
The concept of Geostationary Interferometric Microwave Sounder (GIMS) has been proposed based on the rotating circular thinned array, aiming for China's next generation geostationary meteorological satellite (FY-4M). The spaceborne system design has been investigated. The tradeoff analysis between the system performance and system complexity has been studied. A full-scale ground-based 50∼56GHz GIMS...
Geostationary interferometric microwave sounder (GIMS) is a multichannel microwave interferometer with a rotating circular thinned array. The array has notable differences from Y-type or T-type array. It can get the same number of baselines with less element antennas at the cost of a little more complex. The spatial frequencies are like polar coordinate distribution, but not rectangular or hexagonal...
Demonstrator of the Full Polarization Interferometric Radiometer (FPIR) is a light weight high resolution imaging polarimeter at X-band. It is based on techniques of one dimensional aperture synthesis. Differing from ESTAR-like precedents on polarimetric mode, conical antenna beam and 2-point calibration, FPIR employs two interlaced arrays. They are orthogonally polarized, therefore enable polarimetric...
The Geostationary Interferometric Microwave Sounder (GIMS) is a new concept imaging radiometer proposed by CSSAR, aiming for China's next generation geostationary meteorological satellite (FY-4M). The concept of GIMS is based on aperture synthesis with a rotating circular thinned array. A three-element interferometer has been developed and tested to investigate the feasibility of the GIMS system design...
This paper discusses the sensitivities achieved by either real or synthetic aperture radiometers. In the discussions of both kinds of radiometers, sensitivity is normalized to effective integration time, which is defined to relate the sensitivities of different kind of instruments. Derived relations explicitly demonstrate that the sensitivity by synthetic aperture radiometer is comparable to that...
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