When Is The PSLV-C41/IRNSS-1I Launch Scheduled?
ISRO has scheduled the PSLV-C41/IRNSS-1I mission launch for Thursday. The launch will happen at 04:04 am IST on April 12, 2018.
What Is The PSLV-C41/IRNSS-1I Launch? What Will It Do?
In its forty-third flight, the Polar Satellite Launch Vehicle PSLV-C41 will launch the IRNSS-1I from the first launch pad (FLP) of the Satish Dhawan Space Centre (SDSC) at the Sriharikota High Altitude Range (SHAR) in Andhra Pradesh's Sriharikota. The IRNSS-1I launch will happen in XL configuration on board the PSLV rocket. This will be the twentieth time that the PSLV's 'XL' configuration will be used for a launch. The IRNSS-1I will be the eighth satellite to join ISRO's NavIC navigation satellite constellation. The 8th navigation satellite IRNSS-1I will be a replacement in the NavIC constellation for the 1,425kg IRNSS-1H, whose launch was unsuccessful.
What Are The Previous IRNSS Navigation Satellites That Have Been Launched By ISRO As Part Of The NavIC Satellite Cconstellation?
The previous IRNSS missions to have joined ISRO's NavIC navigation satellite constellation are IRNSS-1A (launched on July 01, 2013), IRNSS-1B (launched on April 04, 2014), IRNSS-1C (launched on October 16, 2014), IRNSS-1D (launched on March 28, 2015), IRNSS-1E (January 20, 2016), IRNSS-1F (launched on March 10, 2016), IRNSS-1G (launched on April 28, 2016), and IRNSS-1H (launched on August 31, 2017). All the launches except IRNSS-1H have been successful. Their purpose is to build India's self-made navigation system - similar to the US' GPS or Global Positioning System. The orbit of some of the IRNSS satellites are geo-stationary or GEO, while some are geo-synchronous or GSO. Please see the table below for reference.
What Happened To The IRNSS-1H Satellite? Why Was The Launch Unsuccessful?
On August 31, 2017, ISRO launched the IRNSS-1H to join its NavIC navigation satellite constellation. IRNSS-1H was planned to be launched by PSLV-C39 into a sub Geosynchronous Transfer Orbit (sub-GTO) with a 284 km perigee and 20,650 km apogee with an inclination of 19.2 degrees with respect to the equatorial plane. The lift-off of the PSLV-C39 rocket carrying the IRNSS-1H satellite was normal, however, the mission was unsuccessful as the IRNSS-1H satellite could not be placed into orbit properly. IRNSS-1H had failed to eject out of the PSLV rocket on August 31, 2017 to its intended orbit as its heat shield failed to separate even around 20 minutes after it was launched. The rocket's heat shield should have separated three minutes into the launch, but failed to do so. After a 19-minute wait for the heat shield to separate, ISRO scientists had declared the mission unsuccessful. The 8th navigation satellite IRNSS-1I will be a replacement in the NavIC constellation for the 1,425kg IRNSS-1H.
What Is ISRO's IRNSS Program?
IRNSS is an independent Indian Satellite based positioning system for critical national applications. The main objective is to provide reliable position, navigation and timing services over India and its neighbourhood, to provide good accuracy to the user.
According to ISRO, IRNSS or Indian Regional Navigation Satellite System "is an independent regional navigation satellite system being developed by India. It is designed to provide accurate position information service to users in India as well as the region extending up to 1,500 km from its boundary, which is its primary service area. An Extended Service Area lies between primary service area and area enclosed by the rectangle from Latitude 30 degrees South to 50 degrees North, and Longitude 30 degrees East to 130 degrees East. IRNSS will provide two types of services, namely, Standard Positioning Service (SPS) which is (similar to US' GPS and) provided to all the users, and Restricted Service (RS), which is an encrypted service provided only to the authorised users. The IRNSS System is expected to provide a position accuracy of better than 20 m in the primary service area."
IRNSS will assist in terrestrial, aerial and marine navigation, disaster management, vehicle tracking and fleet management, integration with mobile phones, precise timing, mapping and geodetic data capture, terrestrial navigation aid for hikers and travellers, visual and voice navigation for drivers and riders.
ISRO has scheduled the PSLV-C41/IRNSS-1I mission launch for Thursday. The launch will happen at 04:04 am IST on April 12, 2018.
What Is The PSLV-C41/IRNSS-1I Launch? What Will It Do?
In its forty-third flight, the Polar Satellite Launch Vehicle PSLV-C41 will launch the IRNSS-1I from the first launch pad (FLP) of the Satish Dhawan Space Centre (SDSC) at the Sriharikota High Altitude Range (SHAR) in Andhra Pradesh's Sriharikota. The IRNSS-1I launch will happen in XL configuration on board the PSLV rocket. This will be the twentieth time that the PSLV's 'XL' configuration will be used for a launch. The IRNSS-1I will be the eighth satellite to join ISRO's NavIC navigation satellite constellation. The 8th navigation satellite IRNSS-1I will be a replacement in the NavIC constellation for the 1,425kg IRNSS-1H, whose launch was unsuccessful.
What Are The Previous IRNSS Navigation Satellites That Have Been Launched By ISRO As Part Of The NavIC Satellite Cconstellation?
The previous IRNSS missions to have joined ISRO's NavIC navigation satellite constellation are IRNSS-1A (launched on July 01, 2013), IRNSS-1B (launched on April 04, 2014), IRNSS-1C (launched on October 16, 2014), IRNSS-1D (launched on March 28, 2015), IRNSS-1E (January 20, 2016), IRNSS-1F (launched on March 10, 2016), IRNSS-1G (launched on April 28, 2016), and IRNSS-1H (launched on August 31, 2017). All the launches except IRNSS-1H have been successful. Their purpose is to build India's self-made navigation system - similar to the US' GPS or Global Positioning System. The orbit of some of the IRNSS satellites are geo-stationary or GEO, while some are geo-synchronous or GSO. Please see the table below for reference.
As ISRO gears up to launch IRNSS-1I on Thursday morning, here is a list of India's navigation satellites
On August 31, 2017, ISRO launched the IRNSS-1H to join its NavIC navigation satellite constellation. IRNSS-1H was planned to be launched by PSLV-C39 into a sub Geosynchronous Transfer Orbit (sub-GTO) with a 284 km perigee and 20,650 km apogee with an inclination of 19.2 degrees with respect to the equatorial plane. The lift-off of the PSLV-C39 rocket carrying the IRNSS-1H satellite was normal, however, the mission was unsuccessful as the IRNSS-1H satellite could not be placed into orbit properly. IRNSS-1H had failed to eject out of the PSLV rocket on August 31, 2017 to its intended orbit as its heat shield failed to separate even around 20 minutes after it was launched. The rocket's heat shield should have separated three minutes into the launch, but failed to do so. After a 19-minute wait for the heat shield to separate, ISRO scientists had declared the mission unsuccessful. The 8th navigation satellite IRNSS-1I will be a replacement in the NavIC constellation for the 1,425kg IRNSS-1H.
What Is ISRO's IRNSS Program?
IRNSS is an independent Indian Satellite based positioning system for critical national applications. The main objective is to provide reliable position, navigation and timing services over India and its neighbourhood, to provide good accuracy to the user.
According to ISRO, IRNSS or Indian Regional Navigation Satellite System "is an independent regional navigation satellite system being developed by India. It is designed to provide accurate position information service to users in India as well as the region extending up to 1,500 km from its boundary, which is its primary service area. An Extended Service Area lies between primary service area and area enclosed by the rectangle from Latitude 30 degrees South to 50 degrees North, and Longitude 30 degrees East to 130 degrees East. IRNSS will provide two types of services, namely, Standard Positioning Service (SPS) which is (similar to US' GPS and) provided to all the users, and Restricted Service (RS), which is an encrypted service provided only to the authorised users. The IRNSS System is expected to provide a position accuracy of better than 20 m in the primary service area."
IRNSS will assist in terrestrial, aerial and marine navigation, disaster management, vehicle tracking and fleet management, integration with mobile phones, precise timing, mapping and geodetic data capture, terrestrial navigation aid for hikers and travellers, visual and voice navigation for drivers and riders.
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