Showing posts with label ISRO. Show all posts
Showing posts with label ISRO. Show all posts

Thursday, March 10, 2016

All set for sixth IRNSS satellite launch

All set for sixth IRNSS satellite launch


The 54 hour, 30 minute countdown status for the March 10 launch of an Indian rocket with the country’s sixth navigation satellite is proceeding normally, said the Indian Space Research Organisation (ISRO).

According to ISRO, the progressing status of the countdown for the launch of 44.4 metre, 320 tonne Polar Satellite Launch Vehicle (PSLV) carrying Indian Regional Navigation Satellite System-IRNSS-1F is expected to blast off around 4 p.m. on Thursday.

Around 20 minutes into the flight, the rocket is expected to put into orbit the 1,425-kg IRNSS-1F satellite at an altitude of 488.9 km.

The satellite with a design life span of 12 years has two payloads for navigation and ranging.

The navigation payload of IRNSS-1F will transmit navigation service signals to the users. This payload will be operating in L5-band and S-band. A highly accurate rubidium atomic clock is part of the navigation payload of the satellite.

The ranging payload of IRNSS-1F consists of a C-band transponder (automatic receivers and transmitters of radio signals) which facilitates accurate determination of the range of the satellite.

IRNSS-1F also carries Corner Cube Retro Reflectors for laser ranging.

Till date, India has launched five regional navigational satellites (IRNSS-1A, 1B, 1C, ID and 1E) as part of a constellation of seven satellites to provide accurate position information service to users across the country and the region, extending up to an area of 1,500 km.

Though the full system comprises nine satellites — seven in orbit and two on the ground as stand-by, the navigation services could be made operational with four satellites, ISRO officials had said earlier.

Each satellite costs about Rs.150 crore and the PSLV-XL version rocket costs about Rs.130 crore. The seven rockets would entail an outlay of about Rs.910 crore.

The entire IRNSS constellation of seven satellites is planned to be completed in 2016 itself.

The first satellite IRNSS-1A was launched in July 2013, the second IRNSS-1B in April 2014, the third on October 2014, the fourth in March 2015, and the fifth in January this year.

The seventh satellite-IRNSS-1G- is expected to be launched in the second half of 2016.

Once the regional navigation system is in place, India need not be dependent on other platforms.

According to ISRO, with the operationalisation of five IRNSS satellites, the proof of concept of an independent regional navigation satellite system over India has been demonstrated for the targeted position accuracy of better than 20 metres over 24 hours of the day.

The operationalisation of the sixth satellite following its launch on March 10 a better position accuracy will be provided, ISRO said.

- Financial Express

Wednesday, February 24, 2016

Statement on Satellite Centre in Vietnam

Statement on Satellite Centre in Vietnam

As part of Space Cooperation between India and Association of South East Asian Nations (ASEAN), Indian Space Research Organization (ISRO), at the behest of Government of India, is working towards the establishment of a Satellite Tracking & Data Reception Station and Data Processing Facility in Vietnam for ASEAN Member countries. This facility is intended to acquire and process Indian Remote Sensing Satellite data pertaining to ASEAN region and disseminate to ASEAN Member countries.

Under this initiative, all ASEAN member countries, including Vietnam will be allowed to access processed remote sensing data pertaining to their country.

Ground facility is designed in such a way that it will not allow Indian data to be accessed and processed by the system.

This information was provided by the Union Minister of State (Independent Charge) Development of North-Eastern Region (DoNER), MoS PMO, Personnel, Public Grievances & Pensions, Atomic Energy and Space, Dr Jitendra Singh in a reply to an unstarred question in Lok Sabha today.

PTI

Wednesday, January 20, 2016

Launch of IRNSS-1E satellite by PSLV-C31

Launch of IRNSS-1E satellite by PSLV-C31


     IRNSS-1E is the fifth navigation satellite of the seven satellites constituting the IRNSS space segment. Its predecessors, IRNSS-1A, 1B, 1C and 1D were launched by PSLV-C22, PSLV-C24, PSLV-C26 and PSLV-C27 in July 2013, April 2014, October 2014 and March 2015 respectively. IRNSS-1E has a lift-off mass of 1425 kg. The configuration of IRNSS-1E is similar to that of IRNSS-1A, 1B, 1C and 1D.

     IRNSS -1E carries two types of payloads – navigation payload and ranging payload. The navigation payload of IRNSS-1E will transmit navigation service signals to the users. This payload will be operating in L5-band and S-band. A highly accurate Rubidium atomic clock is part of the navigation payload of the satellite. The ranging payload of IRNSS-1E consists of a C-band transponder which facilitates accurate determination of the range of the satellite. IRNSS-1E also carries Corner Cube Retro Reflectors for laser ranging.

    Polar Satellite Launch Vehicle, in its 33rd flight (PSLV-C31), will launch IRNSS-1E, the fifth satellite of the Indian Regional Navigation Satellite System (IRNSS). The launch will take place from the Second Launch Pad (SLP) of Satish Dhawan Space Centre (SDSC) SHAR, Sriharikota. As in the previous four launches of IRNSS satellites, PSLV-C31 will use ‘XL’ version of PSLV. This is the eleventh time ‘XL’ configuration is being flown,

     PSLV-C31/IRNSS-1E launch is scheduled on January 20, 2016 at 09:31 Hrs (IST) from Satish Dhawan Space Centre SHAR (SDSC SHAR), Sriharikota, the spaceport of India.

Sunday, September 6, 2015

The Sabotage of India's 'Cold Dreams, the Cryogenic death and revival'


The Sabotage of India's 'Cold Dreams, the Cryogenic death and revival'


    History was written in golden words on 27th August 2015, by Indian Space Research Organization (ISRO). ISRO had flown the Indian flag high and had made the nation proud by fortifying its position in the 'Cryo Club'. ISRO successfully completed the launch campaign of GSLV – D6 carrying India’s latest communication satellite GSAT – VI to a Geosynchronous Transfer Orbit (GTO). Equipped with the indigenous Cryogenic Upper Stage (CUS), the GSLV – D6 had a textbook lift off from the Second launch pad at SHAR. After a undergoing the preparatory 29 hour countdown, the 416 tonne, 49 m tall GSLV-D6 carrying the 2117 kg GSAT-6, blasted off towards the sky as the clock struck 16:52 Hrs.

    At about T -5 seconds before the scheduled lift-off, the four external strap-on's powered by a liquid propellant were ignited signalling the launch of GSLV-D6. Assisted by the solid propellant fueled first stage core motor, GSLV blasted off carrying the dreams of ISRO high-up to the skies. With the HSS separating the control room at SHAR, glued its sight to the giant trajectory tracer. With the Second stage successfully burning out and separating, the wait for the CUS ignition had began. The indigneously developed CUS ignited, lifted the payload soaring up and separated following a flawless flight . Following this, GSAT-6 separated from CUS about 17 minutes after launch. The CUS or Cryogenic Upper Stage was a technology that took ISRO years to develop. The way CUS was constituted is no short of any thriller story!!! So what exactly followed in India mastering this technology?

GSLV - D6

   The development of Cryogenic system is an extremely complicated process and often requires the best technologies available in the field to be implemented to obtain the most efficient result. ISRO worked years to master the technology which was denied repeatedly by the world powers just for the fear of a reverse engineered ballistic missile technology landing right in the doors of ever capable Indians. The GSLV program was constituted in the 1980’s by the Indian government to master the technology for launching Geosynchronous satellites to GTO. With the PSLV program being a great success, ISRO choose to retain junk of major components used on the PSLV and also decided to field the liquid fuelled Vikas engine. The barrier in attaining GTO was always the need to master Cryogenic technology.

     The only nations that had mastered the complex cryogenic technology were USSR and USA. India approached both the nations for the complex technology to be in house and to be incorporated in its further mission. USA responding positively to the request had put in charge General Dynamics Corporation for gifting India it’s last piece in the space race. But the cost was a concern and America denied providing ToT, at certain key junctures, fearing a flank ISRO soon turned down the American offer. The next in the race was India’s trusted ally, Russia, which promised India the KVD-1, built by the Isayev Design Bureau. The KVD-1 had unsurpassed thrust and launch capabilities, the very same engine was developed as a part of Russia’s race to land men on moon. Russia offered two fully built KVD-1 and also promised a complete TOT, all a mere cost of US $200 million deal.

     On 18th January 1991, ISRO and Russian Space agency Glavkosmos signed an elaborate agreement for the ToT of cryogenic engines. The ToT would India would join the league mastered only by Russia and USA and theoretically, India would also have a system that could be mutated to an effective IRBM system with sustained efforts. But the mutation was not an easy process, and the use of hydrogen as a propellant in the upper stages meant that the system could be launched at moments, as against ICBM system requirements. America actively pursued every possible way to curb this development and landed upon the ‘violation of MTCR’ agreements by Russia. With the collapse of USSR, and facing an economical downfall Russia itself was under the umbrella of USA.

Vikas Engine 

   With Russia and India not yielding to the international pressure, USA imposed sanctions on ISRO and Russian space agencies and chocked every development project implanted by ISRO with foreign collaborations. Under the pressure of Clinton, Russia finally backed down on the deal agreed to supply India seven fully built engines for further missions. With Russia denying the technology, the race an indigenously developed Cryogenic system was kicked off by ISRO. Very few breakthroughs were made in the years to come, India was forced to either work in incognito or acknowledge the project by seeking the help of international players. Rumours of Russia covertly transferring the technology to India are a common part of the developmental story.

   The said deal is captured by Brian Harvey in his book ‘Russia in Space: The Failed Frontier’. With Russia agreeing to ratify the MCTR clauses, a small window for the transfer of technology opened up but that mandated the deal could never be acknowledged by both the nations. Harvey quotes ‘ISRO contacted Air India and requested to transport the components and blue prints without acknowledging the parcels’. Air India soon turned down the request raising concerns about the large CIA network that would be tipped at the slightest of the onset on Indian bound flights. The next in the list was Russian ‘Ural Airlines’, with Russia backing the deal Ural was soon to agree for the deal.

    The risk was huge but the relationship between India and Russia was eternal, India was an ally Russia could never manage losing and it went the other way around. With America pushing diplomatically to seal all the loops, the transfer were shrouded in secrecy active spy ring of CIA was scouring Russia to catch hold of USSR’s technology. Russia then transferred the relevant documents, equipments and machinery on board covert Ural flights which were accounted as transferring Indian aircraft technology to be tested in Russian wing tunnel facilities.

Mahendragiri; ISRO

   Every single flight had to be meticulously planned, every component had to be accounted for and a perfect cover drawn, the slightest change and America would be catching up with the story. The transfers had to happen in the dead of the night, the biggest problem was when the components were being loaded in Russia. The aircraft was officially carrying aircraft components from India, so the aircraft had to be sent to India with minimal load, every cargo going on was personally being handled by 'Nambi Narayanan' who had made several trips to Russia. The risk of CIA or other intelligence agencies tracking the package was always a live threat, the way the components reached 'VSSC, Thriuvananthapuram' has been never revealed to the public. The risk was immense but Russia had covertly passed on the blueprints and basic technology to India for starting off with its indigenous cryogenic dream.
 
   By 1992, the work on the cryogenic systems had started in VSSC, Thriuvananthapuram under secrecy but the constant visit of top space brains to the facility had set-off alarms in Washington D.C. CIA by then had confirmed the existence of a project being actively pursued by ISRO to develop a powerful launch system. CIA had thus got the wind of the project and soon tapped its sources in Russia, within months the free flow of technology to ISRO was confirmed and as an icing, CIA received disturbing news of India having achieved major breakthroughs in the development project.

    It is strongly believed by the late 1994, ISRO had significantly mastered the technology and were in the process of implementing the complex tech barrier to attain the masterpiece. But by then a jolt had struck the project right at its heart, a major scandal involving key personnel of VSSC was aired in national news channels across India. Two eminent scientists 'Nambi Narayanan', Project Director (PD) of Cryogenic project and 'D. Sasikumaran', In-charge of Propulsion were charged of leaking crucial information to foreign intelligence agency agents. Serious charges of Espionage was levelled against the top brains of ISRO, they were accused of transferring key developmental data two Maldivian intelligence officers after accepting millions for the exchange. The charges were grave and on 30th October 1994, 'Narayanan' was arrested on charged of Espionage and falling for a well set honey trap.

Narayanan, Frm. Deputy Director Cryogenic System
 
   A detailed investigation by CBI, Intelligence Bureau (IB) found the charges to have been purely fabricated at the behest of an unseen force. The whole case was dismissed by the Supreme Court, the apex judiciary body in India. A compensation of around Rs 1.5 crore was awarded to each individual and every charge leveled was subsequently dropped. They never returned to the developmental wing of ISRO, they were reinstated in 1998 and were transferred out of VSSC to a desk job in HQ, Bengaluru. Narayanan was the one who introduced the concept of liquid propulsion in India, a revolutionary technology which changed the course of space capabilities possessed by ISRO. India’s celebrated ‘Chandrayan’ and the ‘Magalayaan’ missions were centric around the Vikas liquid propelled engines, a pet project of 'Narayanan'. D.Sasikumaran was the men in charge of fabricating and manufacturing cryogenic systems but his designation today is in SAC, Ahmadabad.

    The real target was always compromising India’s quest for Cryogenic technology, India was extremely close to realizing this dream, work was headed in the right way and India was not really far from realizing the dream. ISRO had succeed in setting up test facilities in Mahendragiri, TN where repeated tests had proved the project was headed down the right way. The GSLV was designed to be a three staged rocket, a solid propellant motor was to fire the rocket in the primary flight just after the external strap-on’s separated. Led by India’s most celebrated scientist ‘APJ Abdul Kalam’, India had successfully developed the solid motors, the technology was being actively used in SLV and missile systems.
SasiKumaran; Fmr. In-Charge Cryogenic Systems

    The next up was the liquid propulsion systems, which was being mastered under the guidance of 'Narayanan'. The upper stage was to be powered by cryogenic system, which India had imported from Russia at a whopping cost of US $220 million. India was a rapidly developing country, placing satellites in the GTO was a sheer necessity to India. Further import from Russia was economical unviable and seeking the help of USA was humiliating, may this was the force that kept us driving. Cryogenic systems were being developed by VSSC under 'SasiKumaran', India after all had the blueprints from Russia. World had several times realized the capability of India, given a clean slate India was capable of putting up the best image. The case was complicated here, India had the know-how, and the answer was ready made only implication was to be made.

   Given all the factors, India was bound to master the technology in less than a decade. The threat of India developing an IRBM was never a worry, global powers had realized DRDO was way ahead in the GMP and was bound to bring the world under its reach. But the real concern for global powers was the commercial interest, India was known to develop technology at the lowest possible production cost. The project rate itself would be extremely minimal, India was capable of offering extremely cost effective GTO missions to the world. A few nations had conquered this complex technology, the need was high, and every country needed a satellite for secure communications and for their forces. Losing the market to a third world country was a concern for some of the leading countries. The only way out was to block from India developing a cryogenic engine.

   Countries had tried diplomatically to wind up the project, it had worked but the knife had turned, the diplomatic pressure had meant India had its free hand in tweaking the technology to its need. MCTR had worked initially but now the program was shrouded in secrecy even worrying it was being developed indigenously, there was no way India could be publically driven away from achieving a mile-stone. The only option was a surgical strike right at the heart of the program, India loved peace and the world had reciprocated the damage peacefully, any new drama’s a befitting reply was guaranteed. Hence the blow was struck silently as covertly as the project had started. Two of its top brain framed in a case that never had the base, a case that saw some of the ugliest faces of Indian politics coming out from the hiding shadows.

The Cryogenic Engine
    The external force had succeeded in getting the top brains both directly in-charge of the cryogenic project being forced to abstain from work. Espionage was a serious allegation and demanded through grilling, at the end truth had prevailed. 'Narayanan' and ‘SasiKumaran’ were held back from their office for 4 years, before being reinstated. The ‘Cryogenic project’ had suffered, the damage was done, and the Project Director (PD) was in a jail and the In-Charge of propulsion and Cryogenic systems accompanying his PD in the cell. The case was nothing short of counter-intelligence operation, the eminent souls ‘Narayanan’ and ‘SasiKumaran’ were merely the collateral in a massive operation against Indian interests. India’s Cryogenic dream was put on a back burner, for once the motivational level of ISRO was questioned but there are no barriers for reasoning and developing minds. And there’s ample of it in the ever capable ISRO, the Cryogenic dream is a reality dream today. We’re a select few in the world to posses this complex technology, be proud we developed it indigenously but let there be remorse it was at the cost of the career of two of India’s brightest minds.

    The question that will haunt us for years to come is the role of the foreign agencies. Was there no foreign agency involved in it, but everything a mere coincidence? Coincidence doesn’t play out in a organization, surely not in the case of two meticulously working scientist. So who was it really at the end who had partially succeed in sabotaging, India’s dream project? Was it the Russians? Surely not they worked with us, they transferred the technology right under the Scanner. How about considering Pakistan, India’s long time foe? Well the possibility is real, but could Pakistan really get to know something Indian agencies had shrouded in secrecy, the world’s best agency was yet to get a taste, ISI making a mark is really bleak. The other three in the list are a bit interesting, how about USA, France and China?


Cryogenic Upper Stage being integrated with GSLV - D6; ISRO


   Well it sounds a bit like a power league story, but the one’s to really make anything out of the deal were only these nations. France was a nation that was still mastering the developed technology, the path an ahead for tasting success was pretty far. France is a nation that has stood by India’s side even during its toughest time, remember France is one of the only nations not to impose sanctions on India shortly after nuclear tests. China is a possible conspirator, tensions were high but China itself was still developing the technology and was on the path to prove the Asian power to the world. The rise of India would surely have been a concern for China, but the resources at its disposal were extremely minimal, was it really capable of pulling off such an orchestrated operation. The first on the list would be USA, America had successfully developed the cryogenic system and India relied heavily on their launch system, would you let your costumer develop on your technology and on the top take away your clientele? Sounds a bit realistic, justified and worrying, doesn’t it. Was it after all the world’s best spy agency CIA under the behest of Clinton, which had blocked the ToT that had momentarily sabotaged India’s cold dreams? The question will never be answered, its our imaginations our conclusions but for victims like 'Narayanan' and 'SasiKumaran', the question haunts, their future stares at uncertainty. But the lose is for ‘India’, isn’t it ?????


Article - Karthik Kakoor

Thursday, August 27, 2015

4 Ton GSAT Ready for Lift off from GSLV




4 Ton GSAT Ready for Lift off from GSLV



   A government-owned communications satellite heading for geostationary orbit 22,300 miles above Earth is set for launch Thursday to on a nine-year mission to to support the Indian military.

   The 4,667-pound GSAT 6 spacecraft will lift off aboard India’s Geosynchronous Satellite Launch Vehicle at 1122 GMT (7:22 a.m. EDT) Thursday from the Satish Dhawan Space Center, a spaceport situated about 50 miles north of Chennai on India’s east coast.

   Shrouded inside the GSLV’s metallic nose fairing, the satellite is India’s 25th geostationary communications satellite and has a mission to serve “strategic users,” according to the Indian Space Research Organization. Indian news reports said the prime customer for the new signal relay craft is the Indian military.

   ISRO officials said the 29-hour countdown began Wednesday, and launch crews planned to fill the rocket’s four liquid-fueled boosters and second stage with storable hydrazine and nitrogen tetroxide propellants later in the day. Fueling of the GSLV’s third stage with cryogenic liquid hydrogen and liquid oxygen will come in the final hours of the countdown.

The first stage’s solid propellant load was packed inside the motor when it was assembled.

   Launch is scheduled for 4:52 p.m. local time Thursday at the Indian launch base, and 161-foot-tall GSLV will fire away on the power of four hydrazine-burning strap-on Vikas booster engines and a solid-fueled core motor. At peak power, the first stage and the boosters will generate more than 1.7 million pounds of thrust.

   The four liquid-fueled boosters will ignite at T-minus 4.8 seconds and ramp up to full thrust before the solid first stage fires when the countdown clock reaches zero.

   The core motor will consume its propellant load by T+plus 1 minute, 46 seconds, followed by shutdown of the four Vikas booster engines at T+plus 2 minutes, 29 seconds. A single second stage Vikas powerplant will take over and burn until just shy of the mission’s five-minute point, during which time the GSLV’s payload fairing will release once the rocket is out of the dense lower atmosphere — a milestone projected at T+plus 3 minutes, 50 seconds.

   A cryogenic upper stage engine will ignite at T+plus 4 minutes, 54 seconds, for a nearly 12-minute firing to propel the GSAT 6 satellite into an oval-shaped geostationary transfer orbit. Spacecraft separation is schedule for T+plus 17 minutes, 4 seconds, according to ISRO.

   The launch is targeting an orbit with a high point of 22,353 miles (35,975 kilometers), a low point of 105 miles (170 kilometers) and an inclination of 19.95 degrees.

   Thursday’s launch marks the third time the Indian-built cryogenic engine, which burns a super-cold mixture of liquid hydrogen and liquid oxygen, has flown on the GSLV. Earlier GSLV flights, dating back to the rocket’s maiden mission in 2001, employed a Russian-made cryogenic third stage.

   The all-Indian version of the GSLV, called the GSLV Mk.2, failed on its first launch in April 2010 due to a failure in the upper stage engine’s liquid hydrogen turbopump. The second test launch of the GSLV Mk.2 in January 2014 was successful.

   The launch of GSAT 6 is the ninth flight of the GSLV in both its all-Indian and part-Russian configurations. ISRO considers four of the eight launches to date as successful.





   Thursday’s launch, designated GSLV-D6 by ISRO, is India’s third space mission of the year after two flawless flights of the smaller Polar Satellite Launch Vehicle.

   GSAT 6 will fire its on-board propulsion system to circularize its orbit 22,300 miles above the equator, where it will park itself at 83 degrees east longitude and unfurl a nearly 20-foot (6-meter) S-band antenna, the largest reflector of its kind ever flown on an Indian communications satellite.

  The spacecraft carries S-band and C-band communications payloads with five spot beams and one nationwide beam.

Article first Published in Space Flight Now 

Saturday, July 11, 2015

ISRO Successfully Launches Five Foreign Satellites

ISRO Successfully Launches Five Foreign Satellites 





  Three one-meter resolution optical Earth observation satellites were successfully launched early Saturday, according to operator Twenty First Century Aerospace Technology Company Ltd. (21AT).

    The satellites, which will form the DMC3/TripleSat Constellation, were launched from a site in India and were part of a Sino-UK cooperation project.


    The satellites were developed by UK-headquartered Surrey Satellite Technology Ltd. (SSTL), which is the world's leading small satellite company and part of the Airbus Group.

    21AT, a commercial Earth observation satellite operator based in Beijing, provided the imaging capacity of the three satellites and dubbed the Constellation "Beijing-2."

   The Chinese company will manage the satellites' operation, including observation and control, and data reception and production, as well as related services.

    The cooperative contract for the DMC3/TripleSat Constellation was signed in London in 2011 and witnessed by the UK prime minister and Chinese premier.





    According to SSTL, the satellites provide the best combination of spatial resolution and time resolution -- which stimulates monitoring applications, such as urban planning and intelligent management, at a very high resolution.

    Wang Zhiyong, 21AT deputy general manager, said Beijing-2 was a state-approved program and was part of national civilian-use space infrastructure.

   China has encouraged private investment to support the launch and operation of remote sensing satellites, and ground application systems for satellite navigation.

    Industry observers heralded "Beijing-2" as an important milestone in the involvement of the private sector and the commercialization and international cooperation in the industry.


Article by Hou Qiang and Published in Xinhua




Saturday, March 28, 2015

ISRO ready to launch 4th of 7 IRNSS satellite





ISRO ready to launch 4th of the planned 7 IRNSS satellite


The IRNSS 1D Satellite

       Navigation and Guidance is the most important aspects in the modern world which is being used for both civilian and military purpose. American navigations systems are believed to be one of the most advanced navigation systems in use. Navigational systems used by smart phones, GPS devices and various other navigational systems are provided by these navigational satellites. In military field the use of navigational systems is huge, the usage of these navigational systems has been put in to use extensively in the state of the art GPS guided bombs. The current systems used by India are the property of American Space Agencies and is also provided to and controlled by American agencies. The navigational systems can be used for creating an image of the worldwide networks of Sea, Deserts and high mountains. In possible scenario of America turning down the host of services linked to their satellites to India the loss is unimaginable. As a backup plan India had selected the GLONASS system designed and handled by the Russian Space Agencies. The run up costs in procuring a second standby plan and at the same time running a primary system was huge and the need for an indigenously developed system was felt time and again. With the military making repeated requests to develop the system, so that the control of this crucial field would stay with Indian agencies, GoI awarded the project to the prestigious Space agency of India Indian Space Research Organisation (ISRO). 


Charged with developing this crucial project, ISRO was allotted a monetary support of $250 millions to power up India’s dream project. ISRO termed the project as IRNSS ( Indian Regional Navigation Satellite System).The IRNSS would provide two services, with the Standard Positioning Service open for civilian use and the Restricted Service, an encrypted one, for authorized users and the Military parties. IRNSS would have seven satellites for a dedicated GPS service. To effectively rely with the satellites ISRO opened a dedicated control facility for IRNSS at Bangalore on 1st May 2103. The station would control and communicate with the satellites in association with 21 other sub stations placed across India.  Of the planned seven satellites ISRO has already launched three satellites and have been placed in well designated orbits. The fourth satellite, INRSS1D is scheduled to be launched from SHAR today. The launch of all the seven satellites under the program is scheduled to be completed by 2016 and the system to be operational by late 2016.

Three of the first satellites launched under the program have been placed in a geostationary orbit and are located at 32.5° east, 83° east, and 131.5° East long latitude. Placed in an orbit the two Geosynchronous orbit will cross the equator at 55° East and two at 111.75° East. This arrangement would guarantee that all satellites will enjoy a radio visibility with the ground stations without any hitch. The navigation signals from the satellites will be generated by using atomic clocks and electronic equipment integrated to satellites. The satellites weigh about 1,330 kg and are powered by solar panels generating an approximate output of about 1400 watts. The accuracy of the system is believed to be around 10 meters across the Indian land mass and around 20 meters across the IOR. The system can be put to use for about 1500 kilometres outside Indian landmass.    





 

IRNSS-1A was the first navigational satellite to be launched under the IRNSS project out of the planned seven satellites. IRNSS-1A was launched on board the PSLV C22 on 1st July 2013 from India’s spaceport, Satish Dhawan Space Center at Sriharikota. ISRO planned to place the seven satellites with a gap of about six months between each satellite launch. IRNSS-1B was the second satellite to be launched under the program on 4th April 2014 on board the PSLV C24 mission. The third satellite under the program IRNSS- 1C was launched onboard PSLV C26 on 16th October 2014. At around 17:00 Hrs today ISRO is all set to launch the IRNSS- 1D the fourth satellite under the program from Satish Dhawan Space Centre, Sriharikota. Our team wishes ISRO the best for the mission. General public can watch the launch live on DD National and on WebTv service provided by ISRO. Cheers to ISRO and IRNSS teams.  

Editor - Karthik Kakoor

The IRNSS 1D inside the PSLV C 27 Rocket
Final preparation of Launching the PSLV C 27 with 1.5 ton IRNSS 1D Satellite