NASA, ISRO gearing up to launch joint space mission to map globe every 12 days
Bengaluru (PTI): The NASA-ISRO Synthetic Aperture Radar (NISAR) is set to be launched in the first quarter of 2024 after a few tests, particularly those related to vibration, NASA officials have said.
"ISRO is projecting the first quarter of next year. So, I mean, that's ready," NASA NISAR Project Manager Phil Barela said during a media interaction here on Wednesday.
He is expecting the launch of NISAR (spelt as 'Naisar') "not earlier than January" from the Satish Dhawan Space Centre at Sriharikota aboard the ISRO Geosynchronous Satellite Launch Vehicle Mark-II.
The mission, which has three-year duration, aims to survey all of Earth's land and ice-covered surfaces every 12 days. This will start after a 90-day satellite commissioning period.
Regarding the key tests that are pending to be undertaken, Barela said, "The vibration testing that's underway, but there's a whole slew of performance tests that we need to do."
Battery and simulation tests have to be done to make sure that the system works fine, he said.
"...we'll be doing performance testing on the radars and various spacecraft electronics. So, a lot of testing remains but the big environments test, the only one remaining now, is vibration," Barela said.
NASA Jet Propulsion Laboratory Director Dr Laurie Leshin said the NISAR project is "better than anything that was flown in the past".
"While there are datasets from past missions that can form sort of a baseline, this is a new level of capability that we will have with NISAR," she had told reporters on Tuesday.
"If it's working very well, we will almost certainly extend that mission to get that longer baseline. It is a very important thing to see the Earth change on multi-year timescales. This is what we are looking for," Leshin had said.
According to ISRO, NISAR is a Low Earth Orbit (LEO) observatory being jointly developed by it and NASA.
NISAR will map the entire globe in 12 days and provide spatially and temporally consistent data for understanding changes in the Earth's ecosystems, ice mass, vegetation biomass, sea level rise, ground water and natural hazards, including earthquakes, tsunamis, volcanoes and landslides.
In a handout, NASA said the project aims to understand the dynamics of carbon storage and uptake in wooded, agricultural, wetland and permafrost ecosystems and the response of ice sheets to climate change, the interaction of sea ice and climate, and impacts on sea level rise worldwide.
NISAR will have Synthetic Aperture Radar Instrument (SAR), L-band SAR, S-band SAR and Antenna reflector.
According to NASA, the onboard instruments can even see a minor change of even one centimetre from space.
The SUV-size satellite has a mass of roughly 2,800 kg, which will be powered by two solar arrays providing about four kilowatts of power.
The six feet tall spacecraft bus' will contain the command and communication systems for the instrument payload, which houses the two SAR instruments.
"The bus' will also support the radar antenna reflector and its boom. There is enough fuel aboard to support at least five years of operations," the handout said.
Let the Truth be known. If you read VB and like VB, please be a VB Supporter and Help us deliver the Truth to one and all.
SC refuses to consider listing of plea seeking abolition of collegium system
New Delhi (PTI): The Supreme Court on Monday refused to consider listing of a plea seeking abolition of the collegium system of judges appointing judges in the higher judiciary.
A bench comprising Chief Justice D Y Chandrachud and Justices JB Pardiwala and Manoj Misra took note of the plea of lawyer Mathews Nedumpara that his writ petition seeking abolition of the collegium system has to be listed for hearing.
“I have mentioned it several times. The registry has rejected it and is not listing my petition,” the lawyer said.
“The Registrar (Listing) has said that once the Constitution bench has ruled on something, an Article 32 petition (under the Article a plea can directly be filed in the Supreme Court on grounds of infringement of fundamental rights) is not maintainable. There are other remedies against the registrar’s order,” the CJI said.
The review petition against the NJAC judgement was dismissed in the chambers, the lawyers said, adding, “This is about the credibility of the institution. The Collegium system has to go.”
“I am sorry,” the CJI said.
A five-judge Constitution bench, on October 17, 2015, had termed as unconstitutional and set aside the National Judicial Appointments Commission (NJAC) Act and the 99th Constitutional Amendment which had sought to give the politicians and civil society a final say in the appointment of judges to the high courts and the Supreme Court.
It had held that the independent judiciary was part of the basic structure of the Constitution.
The plea seeking review of the judgement was also dismissed.
The National Democratic Alliance government had passed the NJAC Bill to remove the collegium system, where a group of judges decided who would be judges in the Supreme Court and high courts.
The NJAC had proposed a body comprising six members — CJI, two senior most judges of the Supreme Court, Union minister of law and justice, and two eminent persons.
