theIASHub | 31 Jul, 2025 | 4
NISAR : Recently, the NASA-ISRO Synthetic Aperture Radar (NISAR) satellite was successfully launched from the Satish Dhawan Space Centre in Sriharikota aboard the GSLV-F16 rocket.
o The launch marks a major milestone in Indo-US space collaboration and global Earth observation efforts.
o World’s first Earth observation satellite with dual-frequency SAR (Synthetic Aperture Radar).
ü L-band radar (1.257 GHz) from NASA: Penetrates forests and soil layers to detect ground deformation and subsurface movement.
ü S-band radar (3.2 GHz) from ISRO: Optimised to detect surface-level changes like crop growth, biomass, and water levels.
o Enables all-weather, day-and-night imaging, even through clouds, smoke, or vegetation.
o Mission lifespan: 5 years.
o About Geosynchronous Satellite Launch Vehicle (GSLV) : A launch vehicle developed and operated by ISRO to place satellites into Geosynchronous Transfer Orbits (GTO).
ü GSLV is larger and more powerful than ISRO’s Polar Satellite Launch Vehicle (PSLV).
ü GSLV-F16 is the 18th launch of India’s GSLV and 12th launch using India’s own cryogenic upper stage, which helps carry heavier satellites.
ü The rocket used a 4-metre wide, dome-shaped (ogive) nose cone to protect the NISAR satellite during launch.
ü This is the first time a GSLV rocket has placed a satellite (NISAR) into a Sun-Synchronous Polar Orbit, instead of its usual Geosynchronous Transfer Orbit.
Refine your answer writing skills and elevate your UPSC preparation with personalized support and expert feedback.
Fill out the form to get started with the program or any other enquiries !
Are you dreaming of becoming an IAS officer? Then, IAShub can be your best guide. It is one of the Best IAS Coaching in Delhi. Many students who want to clear the UPSC exam join IAShub for learning. The institute gives both online and offline classes. Their teachers are experienced and helpful. They easily explain every topic. Students also get notes, tests, and tips to do well in the exam.
IAShub is in Delhi and is trusted by many UPSC students. It offers coaching for every part of the UPSC exam – Prelims, Mains, and Interview. The classes are simple and easy to understand. The teachers are experts and guide students in the right way. IAShub is also known for its helpful notes, test series, and answer-writing practice. IAShub is the best coaching in Delhi and also gives UPSC Online Classes. This helps students from any place in India to learn. The online classes are live and also recorded. So, students can watch them anytime. These classes cover the full UPSC syllabus.
Here are some important services provided by IAShub:
The UPSC Civil Services Exam has three parts:
This exam is tough, but with the right guidance, it becomes easy to manage. Students must study smart and stay regular.
IAShub supports students from the beginning to the end. It gives the right books, tests, and notes. The classes are easy to follow, and the teachers are always ready to help. Students get personal doubt sessions too. The test series and answer checking help students learn where they need to do better. Also, free study materials save time and money.
IAShub also guides students during the final stage – the interview. Experts take mock interviews and give useful tips. This full support makes IAShub one of the best IAS coaching in Delhi.
Detailed Solutions & Explanations
Improve Your Answer Writing & Strategy
