RASAT
 | This article needs to beupdated.(June 2016) |
| Mission type | Earth observation |
|---|---|
| Operator | State Planning Organization(DPT) |
| COSPAR ID | 2011-044D |
| SATCATno. | 37791 |
| Website | rasat |
| Mission duration | Planned: 3 years[1] Final: 11 years |
| Spacecraft properties | |
| Manufacturer | TÜBİTAK Space Technologies Research Institute(TÜBİTAK UZAY) |
| Launch mass | 93 kilograms (205 lb)[1] |
| Start of mission | |
| Launch date | August 17, 2011, 08:12:20UTC |
| Rocket | Dnepr |
| Launch site | Dombarovsky 370/13 |
| End of mission | |
| Deactivated | August 2022 |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Sun-synchronous |
| Period | 98.8 minutes[1] |
RASATwas anEarth observation satellitedesigned and developed byTÜBİTAK Space Technologies Research Institute(TÜBİTAK UZAY) and produced inTurkeyto provide high resolution imagery. It was the firstremote sensingsatellite fully realized in Turkey, and the second indigenously developed remote sensing satellite afterBILSAT-1.[1][2]
Financed by theState Planning Organization(DPT) and designed by TÜBİTAK UZAY without any international know-how transfer, RASAT was launched fromDombarovskiy Cosmodrome,nearYasnyinRussiaby aDneprspace launch vehicle at 08:12:20UTCon August 17, 2011, along with seven other satellitesSich-2andBPA-2ofUkraine,NigeriaSat-2andNigeriaSat-XofNigeria,EduSatofIndiaas well asAprizeSat-5andAprizeSat-6ofItaly.RASAT was placed 16 minutes and 9 seconds after the lift-off into alow Earth orbitof 685 km (426 mi). The first signal from RASAT was received in the space center ofAndøya Rocket Range,northernNorwayat 09:44:04 UTC. RASAT was controlled and observed at the space center of TÜBİTAK UZAY inAnkara.[2][3][4]
Mission
[edit]Projected for a mission duration of three years, RASAT is on aSun-synchronousgeocentric orbit.Its instruments, supplied by theSouth Koreanspace technology companySatrec Initiative,[4][5]allowed for aspatial resolutionof 7.5 m (25 ft) at panchromatic band and 15 m (49 ft) at multispectral band. RASAT carried out various civil applications on mapping and planning,disaster management,ecosystem monitoring,environmental control,landcover survey and coastal zone management.[6]Additionally, RASAT was used to test a custom designed on-board computer "BiLGE" capable of usingSpaceWirenetwork, asolid-stateprocessor "GEZGİN-2" (an abbreviation for "GErçek Zamanda Görüntü İşleyeN" ) for real-timeimage compressionusing algorithm ofJPEG 2000and atelecommunicationsystem "Treks" ofX bandtransmitter module with 100MB/sdata transfer rate and 7Wattpower.[1][2][7]
Images
[edit]The first images were received in Ankara on October 8, 2011.[7]With images captured by the satellite between 2012 and 2014, a "mosaic map" of Turkey was compiled. More than 3,000 images showing an area of 30 km × 30 km (19 mi × 19 mi) each were used for the map. The map images are available at the website "gezgin.gov.tr" in theimage file formatsof.ecw(highimage resolution:9 GB, low image resolution: 50 MB),.jp2(21.8 GB, 33 MB),.tif(35.7 GB, 58.1 MB),.img(45.6 GB, 85.7 MB) andKMZ(11.3 MB).[8]The map was distributed to governmental agencies, particularly to theState Hydraulic Works(DSİ) andMineral Research and Exploration(MTA). In 2013, three-dimensional relief maps of Turkey created by RASAT were offered on the web. Customers are able to order and download their actual map requirements.[2][9]
As of November 15, 2015, RASAT took images of 9,546,200 km2(3,685,800 sq mi) Earth surface on 22,699 orbits since its launch on August 17, 2011.[8]
A research project, named "Geoportal", was launched byMinistry of Developmenton January 15, 2013, with an application run-time of four years.[8]Images were uploaded on August 19, 2014, to the portal, which is open to use by public services and universities.[6]As of November 17, 2015, 6,517 processed images captured by RASAT were uploaded to GEZGIN portal.[8]
End of mission
[edit]RASAT was retired in August 2022, after operating for 11 years. Over its lifetime, RASAT took 13,362 images over 58,726 orbits.[10]
References
[edit]- ^abcdef"RASAT Hakkında"(in Turkish). TÜBİTAK UZAY. Archived fromthe originalon 2012-12-27.Retrieved2012-12-21.
- ^abcd"İlk yerli gözlem uydusu Rasat uzayda".CNN Türk(in Turkish). 2011-08-17.Retrieved2012-12-21.
- ^"Fırlatma Başarı İle Gerçekleşti; Rasat Uzayda ve İlk Sinyallerini Verdi"(in Turkish). TÜBİTAK UZAY. 2011-08-17. Archived fromthe originalon 2013-03-26.Retrieved2012-12-21.
- ^ab"İşte Türkiye'nin Uzay Programı"(in Turkish). Savunma >>sanayi Net.Retrieved2012-12-22.
- ^"Past Missions".Satrec Initiative. Archived fromthe originalon 2012-03-30.Retrieved2012-12-22.
- ^ab"RASAT Görüntüleri Kullanılarak Türkiye Mozaiği Oluşturuldu"(in Turkish). Türkiye Bilimsel ve Teknolojik Araştırmalar Kurumu. 2015-03-26.Retrieved2016-06-25.
- ^ab"Türk uydusunun uzaydan çektiği ilk görüntüler".Hürriyet(in Turkish). 2011-10-18.Retrieved2012-12-21.
- ^abcdDeveci, Hüsne Seda."GEZGİN" RASAT Uydusu Görüntüleri Portalı ""(PDF)(in Turkish). TÜBİTAK.Retrieved2016-06-26.
- ^"RASAT, Uzaydaki Görevinin İlk Yılını Başarıyla Tamamladı"(in Turkish). TÜBİTAK UZAY. Archived fromthe originalon 2012-12-27.Retrieved2012-12-21.
- ^"İlk yerli gözlem uydusu emekliye ayrıldı"[First domestic observation satellite retired].Hürriyet(in Turkish). 2022-08-29.Retrieved2022-12-22.
