RISAT: Difference between revisions
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RISAT-2 was the first of the RISAT series to reach orbit.<ref name="ASM News">{{cite web|url=http://www.asmmag.com/news/risat-2-launched|title=Risat-2 Launched|publisher=ASM|accessdate=2009-03-22}}</ref> It was launched successfully on April 20, 2009 at 0015 hours GMT by a [[PSLV]] rocket. The 300-kg satellite was built by ISRO using a X-band SAR manufactured by IAI.<ref name="CNN">{{cite news|url=http://edition.cnn.com/2009/WORLD/asiapcf/03/21/india.satellite/|title=India to launch Israel-backed satellite|publisher=CNN|accessdate=2009-03-22 | date=2009-03-21}}</ref><ref>http://www.iai.co.il</ref><ref name="PTI">{{cite news|url=http://www.ptinews.com/pti\ptisite.nsf/0/891057F482233D216525757F0035CFA6?OpenDocument |title=India set to launch imaging satellite with Israeli support |date=20 Mar 2009 |publisher=PTI |accessdate=2009-03-22 }}{{dead link|date=May 2016|bot=medic}}{{cbignore|bot=medic}} </ref> |
RISAT-2 was the first of the RISAT series to reach orbit.<ref name="ASM News">{{cite web|url=http://www.asmmag.com/news/risat-2-launched|title=Risat-2 Launched|publisher=ASM|accessdate=2009-03-22}}</ref> It was launched successfully on April 20, 2009 at 0015 hours GMT by a [[PSLV]] rocket. The 300-kg satellite was built by ISRO using a X-band SAR manufactured by IAI.<ref name="CNN">{{cite news|url=http://edition.cnn.com/2009/WORLD/asiapcf/03/21/india.satellite/|title=India to launch Israel-backed satellite|publisher=CNN|accessdate=2009-03-22 | date=2009-03-21}}</ref><ref>http://www.iai.co.il</ref><ref name="PTI">{{cite news|url=http://www.ptinews.com/pti\ptisite.nsf/0/891057F482233D216525757F0035CFA6?OpenDocument |title=India set to launch imaging satellite with Israeli support |date=20 Mar 2009 |publisher=PTI |accessdate=2009-03-22 }}{{dead link|date=May 2016|bot=medic}}{{cbignore|bot=medic}} </ref> |
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This satellite was fast tracked in the aftermath of the 2008 Mumbai attacks.<ref name=ASM>{{cite web|url=http://www.asmmag.com/news/india-to-launch-risat|title=The difference between Risat-1 and Risat-2|publisher=ASM|accessdate=2009-03-25}}</ref> The satellite will be used for border surveillance, to deter insurgent infiltration and for anti-terrorist operations.<ref name="timesofindia.indiatimes.com">{{cite news| url=http://timesofindia.indiatimes.com/articleshow/4374544.cms | work=The Times Of India | title=India to launch spy satellite on April 20 | date=2009-04-08}}</ref> It is likely to be placed under the [[Indian Air Force#Aerospace Command|Aerospace Command]] of the [[Indian Air Force]].<ref>http://news.xinhuanet.com/english/2009-02/13/content_10815093.htm</ref> |
This satellite was fast tracked in the aftermath of the 2008 Mumbai attacks.<ref name=ASM>{{cite web|url=http://www.asmmag.com/news/india-to-launch-risat|title=The difference between Risat-1 and Risat-2|publisher=ASM|accessdate=2009-03-25|deadurl=yes|archiveurl=https://web.archive.org/web/20100912231400/http://www.asmmag.com/news/india-to-launch-risat|archivedate=2010-09-12|df=}}</ref> The satellite will be used for border surveillance, to deter insurgent infiltration and for anti-terrorist operations.<ref name="timesofindia.indiatimes.com">{{cite news| url=http://timesofindia.indiatimes.com/articleshow/4374544.cms | work=The Times Of India | title=India to launch spy satellite on April 20 | date=2009-04-08}}</ref> It is likely to be placed under the [[Indian Air Force#Aerospace Command|Aerospace Command]] of the [[Indian Air Force]].<ref>http://news.xinhuanet.com/english/2009-02/13/content_10815093.htm</ref> |
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No details of the technical specifications of RISAT-2 have been published. However, it is likely to have a spatial resolution of about a metre or so. Ship detection algorithms for radar satellites of this class are well-known and available. The satellite also has applications in the area of disaster management and agriculture-related activities.<ref name="timesofindia.indiatimes.com"/> |
No details of the technical specifications of RISAT-2 have been published. However, it is likely to have a spatial resolution of about a metre or so. Ship detection algorithms for radar satellites of this class are well-known and available. The satellite also has applications in the area of disaster management and agriculture-related activities.<ref name="timesofindia.indiatimes.com"/> |
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==RISAT 1== |
==RISAT 1== |
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{{main|RISAT-1}} |
{{main|RISAT-1}} |
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RISAT-1 is an indigenously developed radar imaging satellite successfully launched by a PSLV-XL rocket on April 26, 2012 from Satish Dhawan Space Centre, Shriharikota. RISAT-1 was postponed in order to prioritize the building and launch of RISAT-2.<ref name=ASM/><ref name="ID">{{cite news|url=http://www.indodaily.com/reports/ISRO_New_Satellite_Could_See_Through_Even_Cloudy_Sky_999.html|title=ISRO's New Satellite Could See Through Even Cloudy Sky|date= |
RISAT-1 is an indigenously developed radar imaging satellite successfully launched by a PSLV-XL rocket on April 26, 2012 from Satish Dhawan Space Centre, Shriharikota. RISAT-1 was postponed in order to prioritize the building and launch of RISAT-2.<ref name=ASM/><ref name="ID">{{cite news|url=http://www.indodaily.com/reports/ISRO_New_Satellite_Could_See_Through_Even_Cloudy_Sky_999.html|title=ISRO's New Satellite Could See Through Even Cloudy Sky|date=November 7, 2008|publisher=Indo Daily|accessdate=2009-03-21|deadurl=yes|archiveurl=https://web.archive.org/web/20110520224119/http://www.indodaily.com/reports/ISRO_New_Satellite_Could_See_Through_Even_Cloudy_Sky_999.html|archivedate=May 20, 2011|df=}}</ref><ref>[http://www.spacemart.com/reports/RISAT_Is_A_Home_Grown_Satellite_999.html Launch Info] {{webarchive|url=https://web.archive.org/web/20090522181615/http://www.spacemart.com/reports/RISAT_Is_A_Home_Grown_Satellite_999.html |date=2009-05-22 }}</ref><ref name="ISRO">{{cite web|url=http://www.isro.gov.in/rep2005/EOS.htm |title=Earth Observation System |publisher=ISRO |accessdate=2009-03-21 |deadurl=yes |archiveurl=https://web.archive.org/web/20081010150300/http://www.isro.gov.in/rep2005/EOS.htm |archivedate=October 10, 2008 }}</ref> |
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The features of RISAT-1 include: |
The features of RISAT-1 include: |
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Revision as of 07:51, 11 November 2017
RISAT (Radar Imaging Satellite) (Hindi: रडार इमेजिंग सेटेलाइट) is a series of Indian radar imaging reconnaissance satellites built by ISRO. They provide all-weather surveillance using synthetic aperture radars (SAR).
The RISAT series are the first all-weather earth observation satellites from ISRO. Previous Indian observation satellites relied primarily on optical and spectral sensors which were hampered by cloud cover.
After the November 26, 2008 Mumbai attacks, the launch plan was modified to launch RISAT-2 before RISAT-1, since the indigenous C-band SAR to be used for RISAT-1 was not ready. RISAT-2 used an Israel Aerospace Industries (IAI) X-band SAR sensor similar to the one employed on TecSAR.
RISAT 2
RISAT-2 was the first of the RISAT series to reach orbit.[1] It was launched successfully on April 20, 2009 at 0015 hours GMT by a PSLV rocket. The 300-kg satellite was built by ISRO using a X-band SAR manufactured by IAI.[2][3][4]
This satellite was fast tracked in the aftermath of the 2008 Mumbai attacks.[5] The satellite will be used for border surveillance, to deter insurgent infiltration and for anti-terrorist operations.[6] It is likely to be placed under the Aerospace Command of the Indian Air Force.[7]
No details of the technical specifications of RISAT-2 have been published. However, it is likely to have a spatial resolution of about a metre or so. Ship detection algorithms for radar satellites of this class are well-known and available. The satellite also has applications in the area of disaster management and agriculture-related activities.[6]
RISAT 1
RISAT-1 is an indigenously developed radar imaging satellite successfully launched by a PSLV-XL rocket on April 26, 2012 from Satish Dhawan Space Centre, Shriharikota. RISAT-1 was postponed in order to prioritize the building and launch of RISAT-2.[5][8][9][10]
The features of RISAT-1 include:
- 160 x 4 Mbit/s data handling system
- 50 Newton-meter-second reaction wheels
- SAR antenna deployment mechanism
- Phased array antenna with dual polarisation
References
- ^ "Risat-2 Launched". ASM. Retrieved 2009-03-22.
- ^ "India to launch Israel-backed satellite". CNN. 2009-03-21. Retrieved 2009-03-22.
- ^ http://www.iai.co.il
- ^ "India set to launch imaging satellite with Israeli support". PTI. 20 Mar 2009. Retrieved 2009-03-22.[dead link]
- ^ a b "The difference between Risat-1 and Risat-2". ASM. Archived from the original on 2010-09-12. Retrieved 2009-03-25.
{{cite web}}: Unknown parameter|deadurl=ignored (|url-status=suggested) (help) - ^ a b "India to launch spy satellite on April 20". The Times Of India. 2009-04-08.
- ^ http://news.xinhuanet.com/english/2009-02/13/content_10815093.htm
- ^ "ISRO's New Satellite Could See Through Even Cloudy Sky". Indo Daily. November 7, 2008. Archived from the original on May 20, 2011. Retrieved 2009-03-21.
{{cite news}}: Unknown parameter|deadurl=ignored (|url-status=suggested) (help) - ^ Launch Info Archived 2009-05-22 at the Wayback Machine
- ^ "Earth Observation System". ISRO. Archived from the original on October 10, 2008. Retrieved 2009-03-21.
{{cite web}}: Unknown parameter|deadurl=ignored (|url-status=suggested) (help)
