Raumfahrt - ISRO startet erfolgreich PSLV C-24-Rakete mit IRNSS 1-B-Satelliten


CHENNAI:India’s latest navigational satellite IRNSS 1-B would be launched from Satish Dhawan Space Centre at Sriharikota, some 100 km from here, on April 4.
“The launch of IRNSS 1-B from the Satish Dhawan Space Centre on board PSLV C-24 rocket is scheduled at 5.14 pm on April 4,” ISRO sources said.
While a 52-hour countdown for the launch on April 4 would commence on April 2, a rehearsal for the launch would be held on March 29, they said.
IRNSS 1-B is the second of seven satellites planned for Indian Regional Navigational Satellite System (IRNSS), whose applications include terrestrial and marine navigation, disaster management, vehicle tracking and fleet management.
ISRO had launched IRNSS 1-A, the first in the series, on July 1 last year onboard its workhorse Polar Satellite Launch Vehicle (PSLV) C-22.
Quelle: BL
The Polar Satellite Launch Vehicle (PSLV) is getting ready for its 26th flight from the Indian Space Research Organisation (Isro's) Satish Dhawan Space Centre (SDSC) SHAR at Sriharikota, near Chennai.
This time the vehicle, PSLV-C24, will carry IRNSS-1B, the second satellite of the Indian Regional Navigation Satellite System (IRNSS).
The vehicle is expected to take off from the first launch pad on April 4, 2014 from Sriharikota space station and will use 'XL' version of PSLV on April 4, 2014. IRNSS is an independent regional navigation satellite system, which is developed by India.
The satellite is designed to provide accurate position information service to users in India as well as the region extending upto 1500 kms from its boundary.
Application of IRNSS includes 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 navigation for drivers, said Isro sources.
The vehicle will carry IRNSS-1B, which is the second navigation satellite of the seven satellites constituting the IRNSS space segment. In July 2013, IRNSS-1A was launched by PSLV-C22 both the vehicles got similar configuration. The satellite has been realised in less than seven months after the launch of its predecessor.
IRNSS will provide two types of services, including Standard Positioning Service (SPS), which is provided to all the users and Restricted Service (RS), which is an encrypted service provided only to the authorised users. The System is expected to provide a position accuracy of better than 20 m in the primary service area.
The satellite system also comprises of a space segment and a ground segment. While the space segment consists of seven satellites, with three satellites in geostationary orbit and four satellites in inclined geosynchronous orbit. IRNSS-1A, the first Satellite of the IRNSS constellation, has already started functioning from its designated orbital slot after extensive on orbit test and evaluation to confirm its satisfactory performance, said Isro.
IRNSS ground segement is responsible for navigation parameter generation and transmission, satellite controls, ranging and integrity monitoring and time keeping.
This will be the sixth time XL configuration is being flown, while the previous five include PSLV-C11 for Chandrayaan-1, PSLV-C17/GSAT-12, PSLV C19/ RISAT-1, PSLV-C22/IRNSS-1A and PSLV-C25 Mars Orbiter Spacecraft missions. The mission life would be around ten years for IRNSS-1B.
Quelle: BS
Update: 31.03.2014
Start Testlauf von PSLV-C24 ohne Probleme
The IRNSS-1B will be useful in terrestrial, aerial and sea navigation
The campaign for the lift-off of the Polar Satellite Launch Vehicle (PSLV-C24) is gathering momentum. The rocket will blast off at 5.14 p.m. on April 4 from Sriharikota and put into orbit a 1,432-kg navigation satellite, called the Indian Regional Navigation Satellite System (IRNSS-1B).
Engineers of the Indian Space Research Organisation (ISRO) have stacked up the vehicle’s four stages in the first launch pad. The satellite, sheathed in the heat-shield, has been mated with the vehicle. The launch rehearsal was completed without hitch on Saturday.
“Everything is ready,” said ISRO Chairman K. Radhakrishnan. “On Thursday, we completed the final checks on the vehicle… The countdown, lasting 58 hours and a half, will begin at 6.44 a.m. on April 2.”
M.C. Dathan, Director of Liquid Propulsion Systems Centre at Mahendragiri in Tamil Nadu, said the launch rehearsal “went off without any issues.” ISRO engineers checked the vehicle’s telemetry, tele-command and power systems.
The IRNSS-1B is the second in a series of seven satellites. The IRNSS-1A was put into orbit on July 1, 2013. The PSLV will launch two more such satellites before the end of 2014.
The IRNSS-1B will be useful in terrestrial, aerial and sea navigation. It will beam back accurate information on the position of trucks, cars, battle tanks, aircraft, missiles, ships and submarines with precise timing reference. Truck and car drivers, pilots of civilian or combat aircraft and ship captains can properly plan their route using the IRNSS satellites which will guide them towards their destination with the help of a receiver. The satellites will way-point the missiles to their targets.
Quelle: The Hindu
Update: 3.04.2014
SRO set to launch its navigational sat IRNSS 1B on April 4 
CHENNAI: As part of its aspirations to build a regional navigational system equivalent to Global Positioning System of the US, ISRO is set to send its second satellite from Sriharikota tomorrow, which would help put in place the Indian Regional Navigational Satellite System. The second of the seven planned satellites for the system, IRNSS 1B would be launched at 5.14 PM from the First Launch Pad of Satish Dhawan Space Centre at Sriharikota, where the countdown for the launch was presently proceeding smoothly, ISRO officials said. 
The 1,432 kg weighing satellite is being sent on board an XL version of ISRO's workhorse PSLV, as it was done during the IRNSS 1A launch. This is the sixth time, ISRO is using the XL version of the 44.4 metre-tall PSLV. 
IRNSS 1B has a mission life of 10 years from the date of launch. 
ISRO needs to launch at least four of the seven satellites to start the operations of the IRNSS. The national space agency already launched IRNSS 1A, its first satellite on July 1 last year and it is presently in orbit. 
Being developed by India, 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. IRNSS' applications include terrestrial and marine navigation, disaster management, vehicle tracking and fleet management. IRNSS is similar to US' Global Positioning System, Russia's Glonass and Europe's Galileo. China and Japan too have similar systems named Beidou and Japanese Quasi Zenith Satellite System respectively, ISRO officials said.
Quelle: The Economic Times
Update: 5.04.2014
PSLV-C24 Successfully Launches India's Second Dedicated Navigation Satellite IRNSS-1B
ISRO's Polar Satellite Launch Vehicle, PSLV-C24, successfully launched IRNSS-1B, the second satellite in the Indian Regional Navigation Satellite System (IRNSS), today evening (April 04, 2014) at 1714 hours IST from Satish Dhawan Space Centre SHAR, Sriharikota. This is the twenty fifth consecutively successful mission of PSLV. The 'XL' configuration of PSLV was used for this mission. Previously, the same configuration of the vehicle was used five times to launch Chandrayaan-1, GSAT-12, RISAT-1, IRNSS-1A and Mars Orbiter Spacecraft.

After the lift-off with the ignition of the first stage, the important flight events, namely, stage and strap-on ignitions, heat-shield separation, stage and strap-on separations and satellite injection took place exactly as planned. After a flight of about 19 minutes, IRNSS-1B Satellite, weighing 1432 kg, was injected to an elliptical orbit of 283 km X 20,630 km, which is very close to the intended orbit.

After injection, the solar panels of IRNSS-1B were deployed automatically. ISRO's Master Control Facility (at Hassan, Karnataka) assumed the control of the satellite. In the coming days, five orbit manoeuvres will be conducted from Master Control Facility to position the satellite in its Geosynchronous Circular Orbit at 55 deg East longitude. .

IRNSS-1B is the second of the seven satellites constituting the space segment of the Indian Regional Navigation Satellite System. IRNSS-1A, the first satellite of the constellation, was successfully launched by PSLV on July 02, 2013. IRNSS-1A is functioning satisfactorily from its designated geosynchronous orbital position.

IRNSS is an independent regional navigation satellite system designed to provide position information in the Indian region and 1500 km around the Indian mainland. IRNSS would provide two types of services, namely, Standard Positioning Services (SPS) - provided to all users - and Restricted Services (RS), provided only to authorised users. . .

A number of ground stations responsible for the generation and transmission of navigation parameters, satellite control, satellite ranging and monitoring, etc., have been established in as many as 15 locations across the country.

Two more satellites of this constellation, namely, IRNSS-1C and IRNSS-1D, are planned to be launched in the second half of 2014. The entire IRNSS constellation of seven satellites is planned to be completed by 2015-16.
Quelle: ISRO

PSLV puts navigation satellite in orbit

India marched towards establishing its own navigation system on Friday when its Polar Satellite Launch Vehicle (PSLV-C24) put into precise orbit the country’s second navigation satellite, Indian Regional Navigation Satellite System (IRNSS-1B). The 1,432-kg IRNSS-1B will form part of a constellation of seven navigation satellites.


It was the 25th success in a row for the PSLV, after it majestically lifted off from the first launch pad at Sriharikota at 5.14 p.m. After 19 minutes of flight, IRNSS-1B was put into a perfect orbit.


K. Radhakrishnan, Chairman, Indian Space Research Organisation (ISRO), said two more IRNSS satellites would be put into orbit before 2014-end and three more before mid-2015.


Mission Director P. Kunhikrishnan, said the mission accuracy was such that the satellite achieved a perigee of 283 km against the target of 284 km and an apogee of 20,630 km against the targeted 20,650 km.


“The satellite is doing extremely well in orbit,” said M. Nageswara Rao, Project Director, IRNSS. Its solar panels were deployed. Dr. Rao was confident that the satellite’s life would be longer than the targeted 10 years.


The IRNSS satellites will be useful for land, sea and air navigation. They have civil and defence applications.

Called the Indian Regional Navigation Satellite System-1B, the payload lifted successfully on PSLV-C24 rocket from Sriharikota at 5.14pm. Less than a minute later the satellite was in orbit.

Quelle: The Hindu



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