INS Himgiri & NISAR Satellite – Defence & Space Updates
Exam Level: UPSC / Defence & Space Awareness | Content Type: Notes + MCQs
🚢 1️⃣ Delivery of INS Himgiri
On July 31, 2025, Garden Reach Shipbuilders & Engineers (GRSE) delivered INS Himgiri, the first Nilgiri-class (Project 17A) frigate built by GRSE, to the Indian Navy.
INS Himgiri is the 801st vessel built by GRSE, including 112 warships — the highest by any Indian shipyard.
🔹 Specifications
| Feature | Details |
|---|---|
| Length | 149 meters |
| Displacement | 6,670 tonnes |
| Main Weapons | BrahMos Cruise Missiles, Barak-8 Air Defence |
| Radar | Advanced AESA Radar |
| Propulsion | CODOG System |
🛰️ 2️⃣ Launch of NISAR Satellite
On July 30, 2025, India and the United States jointly launched the NASA–ISRO Synthetic Aperture Radar (NISAR) satellite aboard GSLV-F16 from Sriharikota.
🌍 NISAR is the world’s first satellite integrating dual-frequency SAR:
- L-band (NASA)
- S-band (ISRO)
🔹 Key Features
- All-weather, day-night imaging
- Centimetre-level precision
- Revisits each ground location every 12 days
- Applications in climate monitoring & disaster management
📝 3️⃣ Multiple-Choice Questions (MCQs)
Question 1:
Which shipyard delivered INS Himgiri, and when?
A) Mazagon Dock; July 30, 2025
B) Cochin Shipyard; August 1, 2025
C) GRSE; July 31, 2025
D) GRSE; July 25, 2025
Answer: C
Explanation: GRSE delivered INS Himgiri on July 31, 2025.
Which shipyard delivered INS Himgiri, and when?
A) Mazagon Dock; July 30, 2025
B) Cochin Shipyard; August 1, 2025
C) GRSE; July 31, 2025
D) GRSE; July 25, 2025
Answer: C
Explanation: GRSE delivered INS Himgiri on July 31, 2025.
Question 2:
How many vessels has GRSE built?
A) 801 total, 112 warships
B) 600 total, 50 warships
C) 801 total, 200 warships
D) 700 total, 112 warships
Answer: A
Explanation: GRSE has built 801 vessels, including 112 warships.
How many vessels has GRSE built?
A) 801 total, 112 warships
B) 600 total, 50 warships
C) 801 total, 200 warships
D) 700 total, 112 warships
Answer: A
Explanation: GRSE has built 801 vessels, including 112 warships.
Question 3:
Key systems of INS Himgiri include:
A) Torpedoes only
B) BrahMos, Barak-8, AESA radar, CODOG
C) Balloons for surveillance
D) Only surface-to-air missiles
Answer: B
Explanation: It is equipped with BrahMos, Barak-8, AESA radar, and CODOG propulsion.
Key systems of INS Himgiri include:
A) Torpedoes only
B) BrahMos, Barak-8, AESA radar, CODOG
C) Balloons for surveillance
D) Only surface-to-air missiles
Answer: B
Explanation: It is equipped with BrahMos, Barak-8, AESA radar, and CODOG propulsion.
Question 4:
What makes NISAR unique?
A) Dual-frequency L- and S-band SAR
B) Thermal sensors only
C) Visible spectrum imaging only
D) India-only development
Answer: A
Explanation: It combines NASA’s L-band and ISRO’s S-band radar imaging.
What makes NISAR unique?
A) Dual-frequency L- and S-band SAR
B) Thermal sensors only
C) Visible spectrum imaging only
D) India-only development
Answer: A
Explanation: It combines NASA’s L-band and ISRO’s S-band radar imaging.
Question 5:
Primary application of NISAR?
A) Telecommunications
B) Climate & disaster monitoring
C) Maritime navigation only
D) Space astronomy
Answer: B
Explanation: NISAR provides high-resolution radar data for environmental and disaster monitoring.
Primary application of NISAR?
A) Telecommunications
B) Climate & disaster monitoring
C) Maritime navigation only
D) Space astronomy
Answer: B
Explanation: NISAR provides high-resolution radar data for environmental and disaster monitoring.
