The space agencies of India and Japan have agreed to further enhance cooperation by signing a new MoU, which enables inclusion of satellite navigation and planetary exploration as additional areas ofcooperation. Both agencies have also agreed to conduct a joint experiment to study Venus atmosphereby collecting signals from JAXA’s Akatsuki mission by ISRO’s ground stations (IDSN). JAXA has agreedto support ISRO to establish a ground station in Japan to support NavIC satellite constellation.
Currently, the main challenge is miniaturization. ISRO has already made receivers for both standard and restricted services. We have also shared information such as frequency and other aspects with private vendors and students to work on projects. However, the receiver being used currently is the size of a box. It will reach common people only when it can be embedded in a chip for mobile phone use. We hope that by the year-end, it will have commercial applications.
Within India and 1500 km of its periphery, we have observed up to 5 meters accuracy. Out of around five to six applications today, only Galileo has messaging interface embedded - a feature one will be able to use in NavIC. This feature will be helpful when a command center wants to send warnings to a specific geographic area. For example, fishermen using the system can be warned about a cyclone.
India now includes those countries who have own navigation system.Find Best comparison between all countries Navigation system below.http://newser.in/good-news/indias-own-navigation-system-navic/ i dont know when NAVIC will be operational, have any idea ?is available for public or only for governmental use ?
India's very own desi Global Positioning System (GPS) is operational and is set to hit the market for public use in early 2018. "The Indian Regional Navigation Satellite System (IRNSS) with an operational name of NavIC is currently being tested for its accuracy and is most likely to be available in the market for public use early next year," said Tapan Misra, the director of Ahmedabad-based Space Application Centre (SAC)."Though American GPS with 24 satellites in a constellation has wider reach and covers the entire world, NavIC with seven satellites covers only India and its surroundings but is more accurate than the American system. NavIC will provide standard positioning service to all users with a position accuracy of 5 metre. The GPS, on the other hand, has a position accuracy of 20-30 metre," the SAC director said.We have developed digital chips to miniaturise technology (for use in mobiles and handsets) and experiments are on them. The system is being tested all across the country." He said,Explaining the scientific reasons for NavIC's superiority over GPS, Misra said, "Our system has dual frequency (S and L bands). GPS is dependent only on L band."NavIC will cover the entire country, Indian Ocean and its surroundings. In the west, the system will have a reach till eastern parts of Arabian peninsula and in the east, some parts of China. In the south, NavIC signals will work till Malaysia," Misra said.
For example, GPS-enabled smartphones are typically accurate to within a 4.9 m (16 ft.) radius under open sky
Sources close to ISRO, on the condition of anonymity, told IANS that two more atomic clocks in the satellite system started showing abnormalities thereby taking the total number of failed clocks to five."Hence as a precaution and also to extend the operational life of satellites, the ISRO is running the NavIC system with one clock switched on instead of two. If the running clock fails then the standby clocks will be switched on," sources said.The initial plan was to keep two clocks in the satellite on while keeping the third one on standby.
"We are already using the NavIC system for several applications. The replacement satellite for IRNSS-1A will be launched in July or August. There are also plans to expand the NavIC system by taking the number of satellites to 11 from seven," Kumar said.
It is learnt that ISRO has got the atomic clocks replaced in the two standby NavIC satellites.
Misra said it is not only the atomic clocks in the Indian satellite navigation systems that have failed, the clocks in the European system Galileo too have failed as per reports.
The NavIC system was performing well till the three clocks in IRNSS-1A — the first satellite — failed some months back.
He rubbished reports that said more atomic clocks have started showing abnormalities.
In an attempt to keep India’s regional navigation satellite system fully operational, the Indian Space Research Organisation (ISRO) is preparing to launch a back-up for IRNSS-1A, one of the seven satellites in the constellation, that has been hobbled by the failure of the atomic clocks on board.The PSLV C39 mission, scheduled for late July or early August, will carry the new satellite named IRNSS-1H into orbit, K. Sivan, Director of Vikram Sarabhai Space Centre, told The Hindu.Replacing IRNSS-1A became a priority for the ISRO after it was confirmed in January this year that all the three rubidium atomic clocks on board had stopped functioning. The space agency had decided on launching one of the two spare satellites after initial efforts to restart the clocks failed.
CHENNAI: The Centre is soon expected to issue the notification to make GAGAN, the indigenously developed navigation system, mandatory for new aircraft registered in the country from January 1, 2019.
Speaking to Express, sources in the Ministry of Civil Aviation confirmed that GAGAN (or GPS Aided GEO Augmented Navigation), jointly developed by Indian Space Research Organisation (ISRO) and the Airports Authority of India, is ready for full optimisation and has obtained an international certification for approach and precision landing operations (APV1/1.5) over the subcontinent.
Data from this three-satellite constellation for GAGAN – GSAT 8, 10 and 15 – is also useful in perimeter monitoring and identifying boundaries. “It is accurate to one metre,” said Kumar. He added that other user segments such as intelligent transportation, maritime, highways, railways, surveying, geodesy, security agencies, telecom industry and personal users of position location applications can make use of it.
The system is interoperable with other international systems like the US’ WAAS, European EGNOS, and Japanese MSAS etc. GAGAN’s geo footprint extends from Africa to Australia and has expansion capability for seamless navigation services across the region.GAGAN provides the additional accuracy, availability, and integrity necessary for all phases of flight, from en route through approach for all qualified airports within the GAGAN service volume.
ISRO had announced in July last year that all three atomic clocks on IRNSS-1A, the first of the seven satellites that was launched on July 1, 2013, had malfunctioned, rendering that satellite ineffective. Now, sources associated with ISRO’s satellite navigation programme say four more atomic clocks on the other six satellites are not performing as required.
The subsequent malfunction of four more atomic clocks , sources have indicated, has not incapacitated any other satellite. “Measures are being taken to correct the problems caused by the clocks in the launch of future satellites. The atomic clocks to be used in the other satellites have been modified to prevent malfunction,” a senior official in the programme said.
Asked about the failure of the additional clocks, an official ISRO spokesperson said, “We have not been told of any failures other than what has been stated by the ISRO chairman, which is three clocks on IRNSS-1A.”
Investigators have uncovered the problems behind the failure of atomic clocks onboard satellites belonging to the beleaguered Galileo satnav system, the European Commission said Monday.For months, the European Space Agency—which runs the programme—has been investigating the reasons behind failing clocks onboard some of the 18 navigation satellites it has launched for Galileo, Europe's alternative to America's GPS system.
"The main causes of the malfunctions have been identified and measures have been put in place to reduce the possibility of further malfunctions of the satellites already in space," commission spokeswoman Lucia Caudet said.ESA found after an investigation that its rubidium clocks had a faulty component that could cause a short circuit, according to European sources.
The crucial miniaturisation of chipsets that go into wireless devices such as cell phones and wifi receivers has been achieved by the ISRO.
As per different applications two different kinds of hardwares are required – digital and RF (radio frequency) front end. “Our semiconductor laboratory (SCL) in Chandigarh has developed the digital hardware and tested it. Now, the RF front end hardware is expected to hit the markets next month,” said Tapan Misra, director of Ahmedabad-based SAC to the Express.
Initially ISRO invited the industry to design and develop the chipsets. However there was little interest shown because of high investment costs. “The market didn’t want to take the first step. So we took it on ourselves to do it. Our SCL has developed the digital chips and for manufacturing prototypes of RF Front End hardware, we gave the order to Tower Jazz, a US-based firm specialised in silicon germanium technology suited for increasing bandwidth. We are planning to set-up a fabrication facility with silicon germanium processing technology in SCL,” Misra said.
Misra said the final version would be an 11-channel chipset (7 NavIC satellites and four GPS satellites) operating under dual frequency (S and L bands). This actually delivered higher accuracy than GPS. “GPS is dependent on L band and atmospheric disturbances affected its performance. To assess the errors, atmospheric models are used which would go erratic. In our case, we measure the difference in delay of dual frequency (S and L bands) and can assess the actual delay. Therefore NavIC is not dependent on any model to find the frequency error and is more accurate than GPS. To be precise, NavIC will provide standard positioning service to all users with a position accuracy of 5 metres. The GPS on the other hand, has a position accuracy of 20-30 metres,” Mishra said.
ISRO all set to offer desi GPS for mobile users from next yearQuoteThe crucial miniaturisation of chipsets that go into wireless devices such as cell phones and wifi receivers has been achieved by the ISRO.QuoteAs per different applications two different kinds of hardwares are required – digital and RF (radio frequency) front end. “Our semiconductor laboratory (SCL) in Chandigarh has developed the digital hardware and tested it. Now, the RF front end hardware is expected to hit the markets next month,” said Tapan Misra, director of Ahmedabad-based SAC to the Express.QuoteInitially ISRO invited the industry to design and develop the chipsets. However there was little interest shown because of high investment costs. “The market didn’t want to take the first step. So we took it on ourselves to do it. Our SCL has developed the digital chips and for manufacturing prototypes of RF Front End hardware, we gave the order to Tower Jazz, a US-based firm specialised in silicon germanium technology suited for increasing bandwidth. We are planning to set-up a fabrication facility with silicon germanium processing technology in SCL,” Misra said.QuoteMisra said the final version would be an 11-channel chipset (7 NavIC satellites and four GPS satellites) operating under dual frequency (S and L bands). This actually delivered higher accuracy than GPS. “GPS is dependent on L band and atmospheric disturbances affected its performance. To assess the errors, atmospheric models are used which would go erratic. In our case, we measure the difference in delay of dual frequency (S and L bands) and can assess the actual delay. Therefore NavIC is not dependent on any model to find the frequency error and is more accurate than GPS. To be precise, NavIC will provide standard positioning service to all users with a position accuracy of 5 metres. The GPS on the other hand, has a position accuracy of 20-30 metres,” Mishra said.
3) Geo Leo Links - (no idea what it means)