Launched inside the , Gaofen-step 3 is the 3rd satellite regarding the Asia Highest-Solution Planet Observance Program (CHEOS) show
Developed by brand new China Federal Space Government (CNSA), it is a civilian satellite that have primary profiles as being the County Oceanic Government (SOA), this new Asia Meteorological Government (CMA), the latest Ministry away from Civil Points as well as the Ministry out-of Water Tips.
Purpose Capabilities
Gaofen-3’s top objective will be to introduce an initial quantitative impact to possess wetland category, but has actually bigger applications in the emergency monitoring, liquid conservancy, coastal and you will meteorology. The fresh new collective goal of the brand new CHEOS collection would be to render hot Asan teen girls NRT (Near-Real-Time) observations to possess emergency prevention and you can save, environment change keeping track of, geographical mapping, ecosystem and you will funding surveying, as well as farming help.
Wetlands have become a key goal of environment keeping track of into the evaluation out of financing innovation and also the maintenance out of local environmental environment. The brand new C-band Artificial Aperture Radar (C-SAR) onboard Gaofen-step 3 has extreme features within the wetland monitoring and you will observation from inside the higher spatial quality around most of the-weather conditions. New instrument is actually quad-polarised to include even more scattering details to fulfill new consult from fine wetland monitoring. It notices from inside the a dozen modes, per having different spatial solution and you can swath widths, in order to satisfy the latest multi-member tech criteria.
Show Needs
The fresh new C-band Man-made Aperture Radar (C-SAR) keeps a dozen imaging modes about C-band frequency that’s categorized to your half dozen organizations. The new only one P mode utilizes dropping spotlight technology playing with solitary polarisation to attain a nominal spatial quality of just one yards and you may an effective swath out of ten x 10 kilometres. The super-fine (UF) stripmap function together with uses single polarisation, possesses a great spatial resolution of step 3 meters that have a swath width out of 31 km. You’ll find five modes one get dual-polarisation measurements using the stripmap approach: Great Stripmap, Wider Okay Stripmap, Practical Stripmap and two Prolonged occurrence perspective (E) methods. Great Stripmap comes with the best spatial quality of these on 5 m, that have a great swath depth off fifty meters. New Broad Great Stripmap function features good spatial solution out-of 10 m with a good swath width regarding a hundred kilometres, even though the Basic Stripmap possess a twenty-five m resolution and 130 km swath depth. The new E modes provides a frequency position of scale regarding almost every other modes so you can grow watching possibilities and reduce revisit interval go out. All these keeps good spatial resolution out-of 25 m with differing swath widths from 80 kilometer and you will 130 kilometer.
This new quad-polarisation Stripmap settings tend to be an excellent Quad-pol stripmap setting (Q) with 8 meters spatial quality and you will 31 kilometres swath depth, and you will a broad quad-pol stripmap setting (WQ) that have twenty-five yards spatial solution and you can 40 kilometres swath depth. The fresh Wave function including uses quad-polarisation from inside the discontinuous procedure getting precise (ten yards) solution more an effective 5 x 5 kilometer area. There are 2 ScanSAR methods which happen to be used to coverage a beneficial big swath width having dual polarisation. The fresh new Narrow ScanSAR function has actually an excellent spatial quality out-of 50 yards and you will a good swath thickness away from three hundred kilometres, while the Wider ScanSAR enjoys a spatial resolution out-of 100 m and you will a great swath width off five-hundred km.
Space and Hardware Areas
Gaofen-step 3, developed by the fresh Chinese Academy off Area Tech (CAST), lies in the fresh new ZY1000B satellite bus and includes a few parts: payload and you will provider system. New payload consists of brand new SAR software, research signal program in addition to analysis alert antenna system, while the provider system brings electric battery, installment, fix and you may test temperatures. The brand new SAR antenna try put into four panels and is driven by themselves to meet the desired antenna aperture size for each and every of one’s observing modes. Brand new spacecraft is actually three-axis stabilised which have a production size regarding 2279 kilogram. To get to know the newest demand off imaging standards, the newest satellite spends a twin independent shuttle power configuration, a good around three-junction solar power telephone number as well as 2 battery packs. Additionally employs manage time gyroscopes (CMGs) and you can momentum wheels to compliment brand new higher-balance and you may large-agility control expertise. Gaofen-step three provides an independent wellness government program which enables continuous overseeing out-of crucial incidents, testing of unit updates, and you can providing advanced actions to be sure satellite defense during the orbit.
