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International Space Flight (ESA, Russia, China and others) => Indian Launchers => Topic started by: sanman on 07/29/2013 11:23 AM

Title: NISAR, NASA-ISRO SAR Joint Satellite Project, GSLV Mk II, 2021
Post by: sanman on 07/29/2013 11:23 AM
ISRO and NASA may be in discussions for joint production of a satellite together:

http://economictimes.indiatimes.com/news/politics-and-nation/nasa-isro-in-talks-for-developing-satellite-jointly/articleshow/21455665.cms (http://economictimes.indiatimes.com/news/politics-and-nation/nasa-isro-in-talks-for-developing-satellite-jointly/articleshow/21455665.cms)

I wonder who will launch it? India may be cheaper in this respect.
Title: Re: ISRO-NASA Joint Satellite Project
Post by: antriksh on 07/29/2013 12:57 PM
ISRO has experience in designing Dual band SAR. It has designed one for Chandrayaan-2 mission.

A Dual-frequency Spaceborne SAR Mission Concept for Carbon Disturbance Measurements and Characterization

Paul A Rosen, Jet Propulsion Laboratory, [email protected] (Presenter)
Ralph Dubayah, University of Maryland, [email protected]
Bradford H Hager, Massachusetts Institute of Technology, [email protected]
Ian Joughin, University of Washington, [email protected]
Since the 2007 National Academy of Science “Decadal Survey” report “Earth Science and Applications from Space: National Imperatives for the Next Decade and Beyond,” the National Aeronautics and Space Administration (NASA) has been studying concepts for a Synthetic Aperture Radar (SAR) mission to determine Earth change in three disciplines – ecosystems, solid earth, and cryospheric sciences. One of the most promising and original concepts involves an innovative international partnership between NASA and the Indian Space Research Organization (ISRO). Previous NASA concepts had focused on exploiting an L-band array-fed reflector SAR configuration that enabled > 200 km swath at full SAR resolution and full polarimetry simultaneously in order to meet requirements in all three disciplines. The electronics in this design are relatively compact, allowing for straightforward addition of feed array elements at other frequencies. As the partnership concept with ISRO developed, it became clear that flying dual L- and S-band SAR capabilities, with L-band electronics supplied by NASA and S-band electronics by ISRO, would satisfy science and application requirements of the US and India. A dual-frequency fully polarimetric SAR with the potential for global coverage every 12 days would offer unprecedented capability that researchers could exploit in new and exciting ways. The joint NASA/ISRO science requirements being formulated for ecosystems cover biomass disturbance, agriculture, wetlands and coastal processes, alpine vegetation, and high-resolution soil moisture. The two wavelength system has a number of advantages, including extending the sensitivity of biomass change and regrowth measurements to lower levels of biomass, improved classification of vegetation types, and possibilities for improved vegetation structure estimates, as well as mitigation of ionospheric effects. This poster will provide an overview of the conceptual system and highlight some of the anticipated science products.
Title: Re: ISRO-NASA Joint Satellite Project
Post by: antriksh on 07/29/2013 02:16 PM
ISRO and NASA may be in discussions for joint production of a satellite together:

http://economictimes.indiatimes.com/news/politics-and-nation/nasa-isro-in-talks-for-developing-satellite-jointly/articleshow/21455665.cms

I wonder who will launch it? India may be cheaper in this respect.

The sat might be based on IRS series
Title: Re: ISRO-NASA Joint Satellite Project
Post by: vyoma on 07/31/2014 04:44 PM
http://timesofindia.indiatimes.com/Home/Science/Isros-instrument-design-passes-Nasa-review/articleshow/39369930.cms

Quote
From the drawing board to the review room: Indian Space Research Organisation (Isro) and US' National Aeronautics and Space Administration (Nasa), who were in talks to co-develop a dual frequency synthetic aperture radar late last year. Now, the talks have converted into a project, with Nasa even having cleared Isro's instrument design.

Quote
The project, which Nasa terms Nasa-Isro Synthetic Aperture Radar (Nisar) will use advanced imaging that will provide an unprecedented, detailed view of the earth. "It is being designed to observe and take measurements of some of the planet's most complex processes, including ecosystem disturbances, ice-sheet collapse, and natural hazards such as earthquakes, tsunamis, volcanoes and landslides," Nasa's Jet Propulsion Laboratory has said.

Quote
This was just after the initial mission concept review was done on October 15-16, 2013. On March 19, 2014, the project passed the crucial Key Decision Point-A (KDP-A) review, which, is an important stage in Nasa's Exploration Systems Mission Directorate's project life cycle module.

Following this, the agency will begin reviewing the critical design review, systems integration and operational readiness. Subsequent to this, on March 27, 2014, Isro's instrument design passed Nasa's review, which sources said, is another level of acceptability and a sign that the project's a 'go ahead'.
Title: Re: ISRO-NASA Joint Satellite Project
Post by: vyoma on 07/31/2014 04:54 PM
NI-SAR slides:
http://trs-new.jpl.nasa.gov/dspace/bitstream/2014/44507/1/13-5121_A1b.pdf

Quote
Mission concept:
* Launch date: September 2020
* New Two-frequency L- and S-band Synthetic Aperture Radar(SAR)
* New Sweep SAR technique for rapid global data collection
* Orbit:
     * 747km altitude circular
     * 98 degrees inclination
     * Sun-synchronous, dawn-dusk (6 AM – 6 PM)
     * Exact 12-day repeat within +/- 250 m
* 3 years science operations, but could last many more years
* Data are 10 m resolution or coarser, suitable for science and civilian applications
* Science data from both L- and S-band SAR will be available without any restrictions


Quote
Radar payload concept:
* World's first dual frequency (L- and S- band) spaceborne SweepSAR
* Repeat pass interferometry
* Fully polarimetric SAR capability
* Array-fed reflector (boresight at ~37 degrees from nadir, transmitting a fan beam, and receiving with multiple pencil beams)
    * Shared reflector for both L- and S-bands
    * Separate L- and S-band feeds
    * 240 km swath
    * 12 m diameter reflector
* Observatory pointing control +/- 0.1 degree
* Active front-end electronics, high efficiency T/R module, high rate analog-to-digital converter (ADC), and on-board processing
Title: Re: ISRO-NASA Joint Satellite Project
Post by: Steven Pietrobon on 08/01/2014 07:28 AM
That presentation showed GSLV-II as the launch vehicle.
Title: Re: ISRO-NASA Joint Satellite Project
Post by: vyoma on 08/01/2014 08:06 AM
Yes. GSLV Mk2 seems to be launch vehicle.
Title: Re: ISRO-NASA Joint Satellite Project
Post by: antriksh on 08/01/2014 09:48 AM
NISAR slide mentions that the spacecraft will be based on I3k bus. That looks within range of what current GSLV MK2 can launch (attached slide) to SSPO. Some modification might/might not be required to cryogenic stage (current C12.8 to C15) as current GSLV mk2 uses stage 2 of 39.5 T propellant.
Title: Re: ISRO-NASA Joint Satellite Project
Post by: sanman on 08/14/2014 03:02 AM


http://en.wikipedia.org/wiki/NISAR_%28satellite%29

http://www.jpl.nasa.gov/missions/nasa-isro-synthetic-aperture-radar-nisar/

http://isp.justthe80.com/space-applications/cartography-mapping-surveillance-satellites/nasa-isro-radar-satellite



Title: Re: ISRO-NASA Joint Satellite Project
Post by: sanman on 10/10/2014 01:30 AM
I'd like to ask why NASA and ISRO have chosen this particular project to collaborate on. Is it for the purpose of harmonizing Synthetic Aperture Radar specifications between NASA and ISRO? I'm thinking that this is the reason, due to the past attempt at collaboration between ISRO's Chandrayaan-1 mission and NASA's Lunar Reconaissance Orbiter in the bi-static ice detection experiment.

What might be the follow-on consequences of NASA-ISRO collaboration on NISAR?

I'm thinking that there could be more missions in the future which will attempt to repeat such collaborative bi-static ice detection observations in other parts of the solar system. Harmonized specs on SAR would help to make such missions more successful.

What do you all think?

Title: Re: ISRO-NASA Joint Satellite Project
Post by: vyoma on 10/17/2014 04:31 AM
http://sac.isro.gov.in/SACSITE/nisar/AboutWorkshop.html

Quote
NISAR science workshop is planned to be organized at Space Applications Centre (ISRO), Ahmedabad during 17-18 November 2014 with the primary objectives of: informing and involving Indian applications community about NISAR mission; exploring new applications of dual-frequency SAR data; and searching for collaborative opportunities. A team of scientists from NASA / USA is likely to participate in the workshop.

The workshop invites from the participants, new ideas and innovations on SAR applications for societal benefit. Interested participants will display a poster or make 5-minutes presentations showing new applications and innovative techniques for SAR data utilization. Selected ideas have a chance for being considered for support under NISAR Science programme.
Title: Re: ISRO-NASA Joint Satellite Project
Post by: vyoma on 11/16/2014 12:29 PM
NISAR workshop topics and program guide (17 and 18 Nov 2014):
http://www.sac.gov.in/nisar/PROGRAM%20for%20NISAR%20Science%20Workshop.pdf
Title: Re: ISRO-NASA Joint Satellite Project
Post by: sanman on 05/16/2015 11:58 PM
NASA, ISRO to jointly study global ecological changes (using NISAR):

http://www.hindustantimes.com/india-news/isro-nasa-to-jointly-study-global-ecological-changes/article1-1348005.aspx
Title: Re: ISRO-NASA Joint Satellite Project
Post by: vyoma on 05/27/2015 03:18 AM
http://indianexpress.com/article/technology/science/new-isro-satellite-will-revolutionise-internet-in-india-read-how/

Quote
Meanwhile, SAC which is a part of the NISAR (NASA-ISRO SAR) mission – a joint project between NASA and ISRO – has completed the baseline design review of the payload that will help study the hazards and global environmental change.
Title: Re: ISRO-NASA Joint Satellite Project
Post by: Ohsin on 07/31/2015 04:38 AM
Quote
30-July-2015 17:34 IST
ISRO and NASA jointly working on NASA-ISRO Synthetic Aperture Radar (NISAR) mission

ISRO and NASA are jointly working on the NASA-ISRO Synthetic Aperture Radar (NISAR) mission to codevelop and launch a dual frequency synthetic aperture radar satellite.

NASA-ISRO Synthetic Aperture Radar (NISAR) mission is a dual frequency (L & S Band) Radar Imaging Satellite. In this joint mission, JPL/ NASA will be responsible for design & development of L-band SAR, 12m unfurlable antenna, GPS system and data recorder. ISRO will be responsible for design & development of S-band SAR, Spacecraft Bus, data transmission system, Spacecraft integration & testing, launch using GSLV and on-orbit operations. The aim and objectives of NISAR mission are:

• Design, Develop and launch a Dual frequency (L and S Band) Radar Imaging Satellite.

• Explore newer application areas using L and S band microwave data, especially in natural resources mapping & monitoring; estimating agricultural biomass over full duration of crop cycle; assessing soil moisture; monitoring of floods and oil slicks; coastal erosion, coastline changes and variation of winds in coastal waters; assessment of mangroves; surface deformation studies due to seismic activities etc.

Implementation Arrangement (IA), defining the roles and responsibilities of ISRO and NASA has been signed by the two agencies in September 2014. ISRO has completed the Baseline Design Reviews of Spacecraft and S-band SAR payload. JPL has successfully completed the Mission Concept and Key Decision Point reviews. The first Joint Steering Group (JSG) meeting of NISAR was held on July 21, 2015. NISAR satellite is expected to be launched during the year 2021.

The cost of the project comprises of (i) cost of ISRO’s work share, which is estimated to be Rs 788.00 Cr and (ii) cost of JPL’s work share, which is expected to be around USD 808 millions.


This information was given 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 reply to unstarred question in Rajya Sabha today.

****
emphasis mine
http://pib.nic.in/newsite/PrintRelease.aspx?relid=123963
Title: Re: ISRO-NASA Joint Satellite Project
Post by: vyoma on 08/28/2015 03:29 AM
http://economictimes.indiatimes.com/news/science/isro-working-with-nasa-to-make-maiden-launch-in-2021/articleshow/48701182.cms

Quote
SRIHARIKOTA (AP): India and US have set a target of 2021 to put their collaborative earth observation satellite NISAR in orbit, ISRO Chairman A S Kiran Kumar said today.

Indian Space Research Organisation (ISRO) was working with National Aeronautics and Space Administration (NASA) of the US to undertake the launch of NISAR by 2021, he told reporters here after the successful launch of GSAT-6 onboard GSLV-D6.

"One of the GSLV Mark II will carry NASA's satellite NISAR in 2021. There is a very good chance of commercial requirement. Currently we are working on it," he said.
Title: Re: ISRO-NASA Joint Satellite Project
Post by: worldtimedate on 08/28/2015 07:01 AM

Isro Chairman confirms that GSLV-D6 Rocket will be used for launching ISRO-NASA mission. Here is the report from the Hindu.
ISRO-NASA mission to use GSLV-D6 rocket (http://www.thehindu.com/sci-tech/science/isronasa-mission-to-use-gslvd6-rocket/article7588161.ece)


Quote
NASA ISRO SAR Mission (NISAR) is expected to be launched on board GSLV-D6 in 2020-21, ISRO Chairman A.S. Kiran Kumar said,

Answering a query, a senior ISRO scientist said that using India’s GSLV and not going for space agencies abroad for launching satellites weighing up to 2 tonne would help save on foreign exchange. GSLV will cost just one third of the cost we have to spend on foreign agencies, he said.

A senior official said that there were about 10 Indian satellites which were lined up to be launched on board GSLV -D6.



Title: Re: ISRO-NASA Joint Satellite Project
Post by: input~2 on 08/28/2015 01:27 PM


Isro Chairman confirms that GSLV-D6 Rocket will be used for launching ISRO-NASA mission. Here is the report from the Hindu.
ISRO-NASA mission to use GSLV-D6 rocket (http://www.thehindu.com/sci-tech/science/isronasa-mission-to-use-gslvd6-rocket/article7588161.ece)


Quote
NASA ISRO SAR Mission (NISAR) is expected to be launched on board GSLV-D6 in 2020-21, ISRO Chairman A.S. Kiran Kumar said,

Answering a query, a senior ISRO scientist said that using India’s GSLV and not going for space agencies abroad for launching satellites weighing up to 2 tonne would help save on foreign exchange. GSLV will cost just one third of the cost we have to spend on foreign agencies, he said.

A senior official said that there were about 10 Indian satellites which were lined up to be launched on board GSLV -D6.


--- [ --- (http://---) ]

It won't be D6 which was launched yesterday, this is just a launch sequence number
see: http://www.isro.gov.in/launchers/gslv
Title: Re: ISRO-NASA Joint Satellite Project
Post by: vyoma on 11/04/2015 09:29 AM
http://www.satnews.com/story.php?number=2012261858

Quote
The NASA Jet Propulsion Laboratory (JPL) announced their selection of Astro Aerospace, a Northrop Grumman Corporation (NYSE:NOC) company, to design and manufacture the radar antenna for its NASA-ISRO Synthetic Aperture Radar (NISAR) satellite.
Title: Re: ISRO-NASA Joint Satellite Project
Post by: Ohsin on 11/15/2015 02:41 AM
Quote
NASA-ISRO scientists set to come together for outreach programme

On Monday, some of the NASA scientists will be visiting Gujarat Science City for a special outreach programme with students. “A team of seven scientists from NASA’s Jet Propulsion Laboratory and three others from ISRO will be visiting us. They will be largely be talking about the NISAR mission to about 200-odd science and engineering students,” said Narottam Sahoo, advisor and member secretary at Gujarat Council of Science and Technology (GUJCOST) which is organising the event along with Gujarat Science City.

http://indianexpress.com/article/cities/ahmedabad/nasa-isro-scientists-set-to-come-together-for-outreach-programme/
Title: Re: ISRO-NASA Joint Satellite Project
Post by: Ohsin on 11/20/2015 05:12 AM
https://www.youtube.com/watch?v=raUKLXAPWKo
Title: Re: ISRO-NASA Joint Satellite Project
Post by: Ohsin on 04/13/2016 02:17 AM
Quote
Airbus Defence and Space will supply their latest generation Solid State Recorder for the NASA-ISRO Synthetic Aperture Radar (NISAR) mission, slated for launch in 2020.
<snip>
Jean-Pierre Domenget, who heads up the company's Space Equipment division, reported that the Solid State Recorders will offer 10 Tbit and more as far as capacity is concerned, all in a unit that has a total mass of less than 25 kg.

http://www.satnews.com/story.php?number=82202807
Title: Re: ISRO-NASA Joint Satellite Project
Post by: input~2 on 07/22/2016 09:30 AM
Launch planned for 2021
http://indianexpress.com/article/technology/science/india-us-to-jointly-develop-resource-mapping-satellite-for-launch-in-2021-2928996/
Title: Re: NISAR, NASA-ISRO SAR Joint Satellite Project, GSLV, 2021
Post by: vyoma on 08/13/2016 11:05 PM
Title: Re: NISAR, NASA-ISRO SAR Joint Satellite Project, GSLV, 2021
Post by: vyoma on 08/16/2016 07:00 PM
https://globenewswire.com/news-release/2016/08/16/864626/10164579/en/Northrop-Grumman-s-Astro-Aerospace-Completes-NISAR-Reflector-Preliminary-Design-Review.html

Quote
Astro Aerospace, a Northrop Grumman Corporation (NYSE:NOC) company, has completed the preliminary design review (PDR) of the AstroMesh® radar antenna reflector for the NASA-ISRO Synthetic Aperture Radar (NISAR) satellite. The antenna reflector, furnished by Astro Aerospace, is part of the NISAR L-band synthetic aperture radar managed by NASA's Jet Propulsion Laboratory.
Title: Re: NISAR, NASA-ISRO SAR Joint Satellite Project, GSLV, 2021
Post by: Shams on 08/17/2016 10:59 AM
Can anybody tell about the total mass of this satellite?
Title: Re: NISAR, NASA-ISRO SAR Joint Satellite Project, GSLV, 2021
Post by: vineethgk on 08/17/2016 01:55 PM
Can anybody tell about the total mass of this satellite?
As per previous reports, it was something in the range of 3 tonnes I believe.
Title: Re: NISAR, NASA-ISRO SAR Joint Satellite Project, GSLV, 2021
Post by: vyoma on 08/17/2016 05:41 PM
ISRO and NASA-JPL are developing "L & S Band Airborne SAR" as a precursor to satellite payloads.
Title: Re: NISAR, NASA-ISRO SAR Joint Satellite Project, GSLV, 2021
Post by: vyoma on 08/17/2016 05:48 PM
"L & S Band Airborne SAR" application research announcement.
Title: Re: NISAR, NASA-ISRO SAR Joint Satellite Project, GSLV, 2021
Post by: vyoma on 08/17/2016 06:20 PM
Title: Re: NISAR, NASA-ISRO SAR Joint Satellite Project, GSLV, 2021
Post by: tehwkd on 08/21/2016 01:12 PM
GSLV Mk II not GSLV

https://www.nasa.gov/sites/default/files/atoms/files/nasa_fpb_05_25_16_manifest_release_6_01_2016.pdf
Title: Re: NISAR, NASA-ISRO SAR Joint Satellite Project, GSLV, 2021
Post by: Steven Pietrobon on 08/22/2016 06:23 AM
GSLV Mk II not GSLV

Umm, it says GSLV Mark II!
Title: Re: NISAR, NASA-ISRO SAR Joint Satellite Project, GSLV, 2021
Post by: tehwkd on 08/22/2016 06:54 AM
GSLV Mk II not GSLV

Umm, it says GSLV Mark II!

And the title of this topic says GSLV. Which is why I said "GSLV Mk II not GSLV".

I did not say "GLSV Mk II not, GSLV". :)
Title: Re: NISAR, NASA-ISRO SAR Joint Satellite Project, GSLV Mk II, 2021
Post by: input~2 on 08/22/2016 07:07 AM
Title corrected, thanks!
Title: Re: NISAR, NASA-ISRO SAR Joint Satellite Project, GSLV Mk II, 2021
Post by: Shams on 08/22/2016 11:11 AM
GSLV mk2 payload capacity max 2.5 ton. I think  satellite capacity max 3.0 ton. How it is possible? Will ISRO increase the pay load capacity upto 3.00 ton
Title: Re: NISAR, NASA-ISRO SAR Joint Satellite Project, GSLV Mk II, 2021
Post by: vineethgk on 08/22/2016 12:05 PM
GSLV mk2 payload capacity max 2.5 ton. I think  satellite capacity max 3.0 ton. How it is possible? Will ISRO increase the pay load capacity upto 3.00 ton
GSLV's payload capability to SSO is in the range of 3.1 tonnes as per an older ISRO presentation posted in this thread (link (http://forum.nasaspaceflight.com/index.php?topic=32478.msg1237374.msg#1237374)). 2.5T is its GTO capability.
Title: Re: NISAR, NASA-ISRO SAR Joint Satellite Project, GSLV Mk II, 2021
Post by: vineethgk on 03/09/2017 05:11 AM
ISRO to conduct tests for NISAR in Ahmedabad city sky (http://ahmedabadmirror.indiatimes.com/ahmedabad/others/isro-to-test-drive-nisar-in-city-sky/articleshow/57543977.cms)
Quote
The flight test for the biggest collaboration project between ISRO and NASA — NISAR (NASA-ISRO Synthetic Aperture Radar) will be held over the city sky. The project involves building a 2,600 kg satellite to understand changes in the earth’s surface, icesheet collapses and natural calamities. Space Application Centre of ISRO has planned the flight testing late in March or early April to give scientists direction for the NISAR program that is scheduled to be launched in 2020.

The satellite is designed to observe and take measurements of some of the planet's most complex processes, including ecosystem disturbances, ice-sheet collapse, and natural hazards such as earthquakes, tsunamis, volcanoes and landslides. Regarding the testing that is being planned in a couple of weeks, SAC Director Tapan Misra said, “The flight testing will happen right above aapnu Amdavad. It will be at an altitude of 8 to 10 km above Ahmedabad till final planning of the NISAR program. We will read data from airborne station first which will help scientists prepare for the program.

The frequency and solutions will be same as real project but coverage area will be limited.” A 5 km radius of Ahmedabad city will be taken into account by the station for testing purpose. NISAR will reveal information about the evolution and state of the earth’s crust. The data will help scientists better understand our planet’s processes and changing climate. This will also help in hazard management. About their partnership with NASA, Misra said, “After we launched RISAT in April 2012, NASA evinced in-terest in developing a satellite jointly that can help observing earth in better way with new technology and that is when the journey started.”

RISAT facilitates cloud penetration and imaging even without sunlight. For the airborne test model, both L and S bands have been developed by ISRO. For the final mission, ISRO will design and develop the S-band SAR, Spacecraft Bus, data transmission system, spacecraft integration and testing, launch using heavy rocket geosynchronous satellite launch vehicle (GSLV) and on-orbit operations, while NASA will be responsible for design and development of L-band SAR, 12m unfurlable antenna and its deployment elements, global positioning system (GPS) and data recorder. The satellite will be able to measure earth crust movement minutely, up to millimetres.
Title: Re: NISAR, NASA-ISRO SAR Joint Satellite Project, GSLV Mk II, 2021
Post by: Danderman on 03/09/2017 05:21 AM
This should be an interesting object for amateur satellite observers, depending on its position relative to the terminator.

Which raises the issue of why a radar satellite would go into a sun-synch orbit.
Title: Re: NISAR, NASA-ISRO SAR Joint Satellite Project, GSLV Mk II, 2021
Post by: Steven Pietrobon on 03/09/2017 09:03 AM
Which raises the issue of why a radar satellite would go into a sun-synch orbit.

That's a good question. Its obviously not about having the same sun angle every day, since the illumination source is the satellite itself. If the crossing is at dawn and dusk, that would mean the satellite is in constant solar illumination and so would require smaller smaller solar arrays and batteries. SSO also means the revisit time is in multiple of days, instead of some odd time interval.
Title: Re: NISAR, NASA-ISRO SAR Joint Satellite Project, GSLV Mk II, 2021
Post by: baldusi on 03/09/2017 11:09 AM
This should be an interesting object for amateur satellite observers, depending on its position relative to the terminator.

Which raises the issue of why a radar satellite would go into a sun-synch orbit.
SAR usually go to SSO. Illumination is constant and thus you can get away with fixed solar panels, and thermal management is greatly simplified by having a hot side and a cold side.
Please remember that these satellites also have huge antennas that have to stay pointed to Earth.
Title: Re: NISAR, NASA-ISRO SAR Joint Satellite Project, GSLV Mk II, 2021
Post by: vineethgk on 04/12/2017 06:01 AM
NISAR payload to undergo flight test today (http://ahmedabadmirror.indiatimes.com/ahmedabad/others/nisar-to-take-flight-today/articleshow/58136025.cms)
Quote
Scientists working on one of the biggest collaborative projects undertaken by ISRO and NASA will take the project a step ahead today by kicking off the radar flight testing of NISAR (NASA-ISRO Synthetic Aperture Radar). A special aircraft landed at the city airport on Tuesday to carry the radars developed at the Space Application Centre’s (SAC) Ahmedabad facility for initial testing.
Quote
It should be noted that the SAC developed radar will be tested in Ahmedabad’s sky for three months. As per sources, the radar developed by SAC will be fixed on a Beechcraft Super King B 200 — owned by ISRO — for the first flight primarily to ‘understand weather and geographical conditions’ to continue testing further. NISAR mission is a dual frequency (L & S Band) Radar Imaging Satellite. Confirming the development, SAC Director Tapan Misra said, “We will test the radar by taking images from about 8km above sea level; the same area will be further studied by scientists from ground level to understand the radar’s accuracy level.
Quote
“The flying is essentially to understand how the radar sees the crops,” said Misra. The data collection and observation will also scientists time to analyse and simulate data from the radar. The mission is schedule for a launch in 2020.
Title: Re: NISAR, NASA-ISRO SAR Joint Satellite Project, GSLV Mk II, 2021
Post by: input~2 on 06/26/2017 10:02 AM
Will NASA-ISRO satellite pass the Trump test? (http://indianexpress.com/article/technology/science/will-nasa-isro-satellite-pass-the-trump-test-4722204/)
Title: Re: NISAR, NASA-ISRO SAR Joint Satellite Project, GSLV Mk II, 2021
Post by: sanman on 08/26/2017 02:16 AM
NISAR may be the world's most expensive civilian imaging satellite:

http://www.financialexpress.com/india-news/good-news-india-to-get-worlds-most-expensive-imaging-satellite-nisar-to-prevent-landslide-disasters/817696/
Title: Re: NISAR, NASA-ISRO SAR Joint Satellite Project, GSLV Mk II, 2021
Post by: worldtimedate on 08/27/2017 01:46 AM
ISRO, NASA to collaborate on space-based sensors, radar systems (http://www.thehindubusinessline.com/news/science/isro-nasa-to-collaborate-on-spacebased-sensors-radar-systems/article9823827.ece)

Quote
India's space agency, ISRO, and NASA of the US are working on the development of advanced space-based sensors and radar systems that can help sharpen earth observation applications in the future, according to Tapan Misra, Director of the Ahmedabad-based Satellite Application Centre (SAC).

One of the focus areas of the joint venture called NISAR (NASA-ISRO Synthetic Aperture Radar) is making sensors in the L&S band. These can help in observations such as deformations in the land surface, details of the coastline and depths of the ocean, to aiding in disaster response.

Misra made these observations while delivering a lecture organised by the Aeronautical Society of India (ASI) and the Sensors Research Society of India here on Friday. The NISAR project agreement signed between the two agencies aims to launch an earth monitoring satellite by 2021.

Quote
The SAC will take the lead in the development of C-band radar imaging as well as in microwave and optical sensors, which have a big role to play in the future. The Indian Space Research Organisation is planning missions to gear itself to meet the growing demands for observational studies with multiple applications.

In the quest to connect the benefit of space-based observations to the advantage of the common man, SAC has conceived and launched a spectrum of optical and microwave payloads. In the last two decades, the optical observation capability has improved from 35 m to 60 cm. Sensor technology has changed from electrical transducers to integrated chips & is visible to microwaves," he said.

At present there are 13 operational Earth Observation (EO) satellites. SAC has built specific air-borne electro-optical sensors to meet the exclusive requirements of high resolution and hyper-spectral imaging from an aerial platform as well, Misra added.

--- [ --- ]
Title: Re: NISAR, NASA-ISRO SAR Joint Satellite Project, GSLV Mk II, 2021
Post by: sanman on 01/31/2018 04:46 AM
Northrop-Grumman validates the reflector antenna for NISAR:

http://www.satellitetoday.com/technology/2018/01/30/nasa-isro-satellites-antenna-reflector-passes-cdr/
Title: Re: NISAR, NASA-ISRO SAR Joint Satellite Project, GSLV Mk II, 2021
Post by: vineethgk on 05/16/2018 11:23 PM
Quote
Isro sources claim that the NISAR satellite will be launched, hopefully, by 2020-21. Misra said that joint testing of NISAR’s two radar systems — the S-Band developed by Isro and the L-band radar developed by the US — will be conducted soon and the two technologies will be integrated.
Source (https://m.timesofindia.com/city/ahmedabad/indigenous-atomic-clock-developed-at-sac-to-be-in-orbit-by-december/articleshow/64197082.cms)