IRNSS-1A is the first navigational satellite in the Indian Regional Navigation Satellite System (IRNSS) series of satellites been placed in geosynchronous orbit.[1][2]
Satellite
The satellite has been developed at a cost of Template:INRConvert,[3][4] and was launched on 1 July 2013. It will provide IRNSS services to the Indian public, which would be a system similar to Global Positioning System (GPS) but only for India and the region around it.[5]
Each IRNSS satellite has two payloads: a navigation payload and CDMA ranging payload in addition with a laser retro-reflector. The payload generates navigation signals at L5 and S-band. The design of the payload makes the IRNSS system inter-operable and compatible with GPS and Galileo.[6] The satellite is powered by two solar arrays, which generate power up to 1,660 watts, and has a lifetime of ten years.[1]
Launch
The satellite was launched from the Satish Dhawan Space Centre (SDSC) on 1 July 2013 at 11:41 PM (IST).[7] The launch was postponed from its initial launch date of 26 June 2013 due to a technical snag in the 2nd stage of the PSLV-C22 launch rocket.[8] ISRO then replaced the faulty component in the rocket and rescheduled the launch to 1 July 2013 at 11:43 p.m.[9][10]
Scientists from the German Aerospace Centre (DLR)'s Institute of Communications and Navigation in Oberpfaffenhofen, Germany, have received signals from IRNSS-1A. On 23 July 2013, the German Aerospace Center scientists pointed their 30-meter dish antenna at Weilheim towards the satellite and found that it was already transmitting a signal in the L5 frequency band.[11]
Partial Failure
The three Rubidium atomic clocks on-board IRNSS-1A failed, with the first failure occurring in July 2016. ISRO planned to replace it with IRNSS-1H, in August 2017, but this failed to separate from the launch vehicle, [12][13] but on 12 April 2018, ISRO launched successfully IRNSS-1I as a replacement for IRNSS-1A.[14]
The cause of failure was traced to one of the feed through capacitor carrying the DC supply to the physics package of clock, malfunctioning due to excessive rise in temperature.[15]
See also
- Communication-Centric Intelligence Satellite (CCI-Sat)
- GPS-aided geo-augmented navigation (GAGAN)
- Satellite navigation
References
- ↑ 1.0 1.1 Cite error: Invalid
<ref>tag; no text was provided for refs namedn2yo - ↑ IRNSS. space.skyrocket.de. Retrieved 8 April 2012.
- ↑ India's first ever dedicated navigation satellite launched. DNA India(2 July 2013). Retrieved 24 July 2013.
- ↑ India's first dedicated navigation satellite placed in orbit. NDTV(2 July 2013). Retrieved 24 July 2013.
- ↑ Planned Satellite Launches in 2013. satlaunch.net(19 March 2013). Retrieved 20 March 2013.
- ↑ IRNSS. space.skyrocket.de. Retrieved 20 March 2013.
- ↑ India launches its first navigation satellite. The Times of India. Retrieved 1 July 2013.
- ↑ Technical snag puts off satellite launch: ISRO. SGP. Retrieved 2 June 2013.
- ↑ PSLV-C22/IRNSS-1A Mission Status. ISRO. Retrieved 26 July 2013.
- ↑ Indian equivalent of the GPS satellite. The Hindu(14 June 2013). Retrieved 14 June 2013.
- ↑ Indian Regional Navigation Satellite Starts Signal Transmissions. GPS World(25 July 2013). Retrieved 28 July 2013.
- ↑ Atomic clocks on indigenous navigation satellite develop snag. The Hindu. Retrieved 2017-01-31.
- ↑ Questions: Loksabha- Q.No. 1112 Answered on: 08.02.2017.
- ↑ PSLV-C41/IRNSS-1I Mission.
- ↑ Launching of Replacement Navigation Satellite. pib.nic.in. Retrieved 2018-07-19.
External links
Template:IRNSS satellites Template:Indian spacecraft Template:Orbital launches in 2013