The newest multi-affiliate conditions need belongings and ocean keeping track of, crisis cures, water conservancy, and you will meteorology
Gaofen-step 3 is the first civil C-ring polarimetric SAR (Synthetic Aperture Radar) imaging satellite out-of CNSA (Asia National Space Government), Beijing, China. GF-3 belongs to new CHEOS (Asia High definition World Observance System) family unit members for the purpose to add high-resolution observations and you may disaster overseeing. Its number 1 users could be the Condition Oceanic Management (SOA), the newest China Meteorological Management (CMA), the fresh new Ministry regarding Civil Things, as well as the Ministry out-of Liquid Information.
Water trend, ocean surface cinch community, inner trend, front facial skin, superficial water topography, ocean facial skin oils spill,water frost, environmentally friendly wave, coastal zone and you may sea facial skin aim
Flooding submerged area, debris circulate, landslide, freeze otherwise snowfall, extent out-of ocean ice, drought scope, buildings, temporaryhousing, customers, farming and you will land fool around with, flood manage facilities
Services out-of lake basin expertise, surface drinking water shipping, flooding range, floor wetness posts, homes explore andvegetation exposure. Facial skin h2o indicators, ponds, reservoirs (dams), streams, wetlands, glaciers, accumulated snow, otherimportant water sources, irrigation areas, groundwater remote sensing monitoring indications, karst, phreatic drinking water,springs, geological landforms, an such like.
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Spacecraft
Brand new Sweetheart-step three satellite is dependent on this new ZY1000B system, developed by the fresh new Chinese Academy out of Room Technical (CAST), and you can contains two parts: payload and you can services system. This new payload consists of the SAR weight, studies alert system, data transmission antenna program. This service membership program brings battery, installations, repairs and you may sample heat, also a battery pack, thoughts handle, propulsion, overseeing and you may manage, studies government, framework and you will thermal handle program.
Brand new Girlfriend-step 3 satellite is actually a good around three-axis stabilized having a launch size of around 2779 kg, and you can a routine longevity of 8 age. This new spacecraft have highest-stability and you may high-agility thinking control systems due to their a mix of CMGs (Manage Second Gyros) and you may momentum rims. The brand new satellite functions inside the a keen orbit altitude of around 755 km for the a sunrays synchronous orbit into the an area searching thoughts.
The brand new satellite switches into an effective about three-axis stabilized soil directional manage function, the leading accuracy surpasses 0.03?, the soundness is superior to 5 x ten -4 ?/s, and also a great move operate convenience of ±30.5?. This new satellite is utilizing a twin separate shuttle energy setting, a around three-junction GaAs solar cellphone range, a 100 Ah NiCd battery and you will a 225 Ah lithium-ion battery pack, can meet new consult of your own satellite imaging requirements. If the returns power of one’s platform bus is not adequate or perhaps the coach output is abnormal, brand new cargo high voltage power supply is going to be converted into an excellent low-voltage power supply as a result of good grid control and become utilized to your program gadgets. Brand new satellite has an autonomous health government system, that may carried on monitor vital situations, gauge the tool standing and take multiple energetic procedures ahead of time to make sure satellite coverage for the orbit.
Satellite Technical Have
Multi-Polarization and Multiple-Imaging Form Design:The GF-3 satellite has 12 imaging modes, including spotlight, stripmap and scan, with four polarization capability. In order to realize multi-polarization and multi-imaging modes, the following design ideas were adopted:
1) Multi-polarization data is received by using polarization go out office and you may good positive and negative volume modulation slope, so as to improve ambiguity out of area objectives.
2) Active phased number antenna can be used to find flexible command over imaging modes and versatile changing regarding revolution ranking. Having fun with good waveguide position antenna, H polarization waveguide and you may V polarization waveguide are produced correspondingly, that will effectively slow down the shared coupling between them antennas, boost the port isolation of one’s antenna, after which improve the polarization isolation of antenna.
3) The computer have multiple LFM (Linear Regularity Modulated) laws bandwidth and you can day depth combos. The twelve kinds of imaging settings correspond to 18 categories of LFM indicators, with different filter systems found in the new rule way to ensure that additional data transfer indicators try suppressed.
