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ISRO gears up to launch IRNSS 1D

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Nozzle End Segment of PSLV-C26 First (core) Stage being hoisted during Vehicle Assemby.

After completing an eventful year, ISRO is gearing up for some satellite launches this year, with the IRNSS 1D being the first, which would put in place India’s own navigation system on par with the Global Positioning System of the U.S.

“The launch campaign for IRNSS 1D has come, which starts on January 16. Within two months, all components from other ISRO labs have to reach Sriharikota. The launch is likely after March 15,” a senior ISRO official told PTI.

IRNSS 1D is the fourth in the series of seven satellites, the national space agency is planning to launch to put in place the Indian Regional Navigation Satellite System (IRNSS).

While four satellites would be sufficient to start operations of the system, the remaining three satellites would make it more accurate and efficient.

The other launches also relate to the IRNSS series with the IRNSS1E and IRNSS1-F satellites to be launched before the year end, he said.

The first three satellites in the IRNSS series were launched from Sriharikota on July 1, 2013, April 4 and October 16 last year respectively.

The fully deployed IRNSS would consist of three and four satellites in GEO stationary and in inclined geosynchronous orbits respectively, about 36,000 km above the Earth.

The system would provide two types of services — Standard Positioning Service, which is provided to all the users and Restricted Service, which is an encrypted service provided only to the authorised users.

The IRNSS system was targeted to be completed by this year at a total cost of Rs. 1420 crore.

IRNSS is designed to provide accurate position information service to users in the country as well as the region extending up to 1,500 km from its boundary, which is its primary service area.

A select group of countries have their own navigation systems — Russia’s Global Orbiting Navigation Satellite System (GLONASS), United States’ Global Positioning System (GPS), European Union’s Galileo (GNSS), China’s BeiDou satellite navigation system and the Quasi-Zenith Satellite System.

ISRO not only launched a GLSV rocket, a GSLV Mk III, besides two PSLVs during 2014 but also successfully inserted its Mars orbiter into the Martian atmosphere and tested the re-entry of unmanned crew module from space.

ISRO gears up to launch IRNSS 1D - The Hindu
 
IRNSS-1D satellite scheduled for launch on March 28

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The fourth satellite of IRNSS Constellation, IRNSS-1D will be launched onboard PSLV-C27. The satellite is one among the seven of the IRNSS constellation of satellites slated to be launched to provide navigational services to the region. The satellite will be placed in geosynchronous orbit.

The satellite will help augmenting the satellite based navigation system of India which is currently under development. The navigational system so developed will be a regional one targeted towards South Asia. The satellite will provide navigation, tracking and mapping services.

IRNSS-1D
IRNSS-1D is the fourth navigation satellite of the seven satellites constituting the IRNSS space segment. Its predecessors, IRNSS-1A, 1B and 1C were launched by PSLV-C22, PSLV-C24 and PSLV-C26 in July 2013, April 2014 and October 2014 respectively. IRNSS-1D has a lift-off mass of 1425 kg. The configuration of IRNSS-1D is similar to that of IRNSS-1A, 1B and 1C. The satellite has been realised in less than four months after the launch of its predecessor.

The two solar panels of IRNSS-1D consisting of Ultra Triple Junction solar cells generate about 1660 Watts of electrical power. Sun and Star sensors as well as gyroscopes provide orientation reference for the satellite. Special thermal control schemes have been designed and implemented for some of the critical elements such as atomic clocks. The Attitude and Orbit Control System (AOCS) of IRNSS-1D maintains the satellite's orientation with the help of reaction wheels, magnetic torquers and thrusters. Its propulsion system consists of a Liquid Apogee Motor (LAM) and thrusters.
IRNSS-1D will be launched into a sub Geosynchronous Transfer Orbit (sub GTO) with a 284 km perigee (nearest point to Earth) and 20,650 km apogee (farthest point to Earth) with an inclination of 19.2 deg with respect to the equatorial plane.

After injection into this preliminary orbit, the two solar panels of IRNSS-1D are automatically deployed in quick succession and the Master Control Facility (MCF) at Hassan takes control of the satellite and performs the initial orbit raising manoeuvres consisting of one manoeuvre at perigee (nearest point to earth) and three at apogee (farthest point to earth). For these manoeuvres, the Liquid Apogee Motor (LAM) of the satellite is used, thereby finally placing it in the circular geostationary orbit at its designated location.


Read more at:
IRNSS-1D satellite scheduled for launch on March 28 - The Economic Times

IMAGES OF PSLV VEHICLE INTEGRATION AT ISRO

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IRNSS 1D - ISRO
 
IRNSS-1D satellite scheduled for launch on March 28

proxy


The fourth satellite of IRNSS Constellation, IRNSS-1D will be launched onboard PSLV-C27. The satellite is one among the seven of the IRNSS constellation of satellites slated to be launched to provide navigational services to the region. The satellite will be placed in geosynchronous orbit.

The satellite will help augmenting the satellite based navigation system of India which is currently under development. The navigational system so developed will be a regional one targeted towards South Asia. The satellite will provide navigation, tracking and mapping services.

IRNSS-1D
IRNSS-1D is the fourth navigation satellite of the seven satellites constituting the IRNSS space segment. Its predecessors, IRNSS-1A, 1B and 1C were launched by PSLV-C22, PSLV-C24 and PSLV-C26 in July 2013, April 2014 and October 2014 respectively. IRNSS-1D has a lift-off mass of 1425 kg. The configuration of IRNSS-1D is similar to that of IRNSS-1A, 1B and 1C. The satellite has been realised in less than four months after the launch of its predecessor.

The two solar panels of IRNSS-1D consisting of Ultra Triple Junction solar cells generate about 1660 Watts of electrical power. Sun and Star sensors as well as gyroscopes provide orientation reference for the satellite. Special thermal control schemes have been designed and implemented for some of the critical elements such as atomic clocks. The Attitude and Orbit Control System (AOCS) of IRNSS-1D maintains the satellite's orientation with the help of reaction wheels, magnetic torquers and thrusters. Its propulsion system consists of a Liquid Apogee Motor (LAM) and thrusters.
IRNSS-1D will be launched into a sub Geosynchronous Transfer Orbit (sub GTO) with a 284 km perigee (nearest point to Earth) and 20,650 km apogee (farthest point to Earth) with an inclination of 19.2 deg with respect to the equatorial plane.

After injection into this preliminary orbit, the two solar panels of IRNSS-1D are automatically deployed in quick succession and the Master Control Facility (MCF) at Hassan takes control of the satellite and performs the initial orbit raising manoeuvres consisting of one manoeuvre at perigee (nearest point to earth) and three at apogee (farthest point to earth). For these manoeuvres, the Liquid Apogee Motor (LAM) of the satellite is used, thereby finally placing it in the circular geostationary orbit at its designated location.


Read more at:
IRNSS-1D satellite scheduled for launch on March 28 - The Economic Times

IMAGES OF PSLV VEHICLE INTEGRATION AT ISRO

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IRNSS 1D - ISRO


It will start working only after all 7 sats are in orbit??
 

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