सामयिक विषय: Scientific

DRDO successfully test fires Nag missile

Successful test of Anti-Tank Missile ‘Nag’

Question- ‘Nag’ is a …
(a) Surface to air missile
(b) Surface to surface missile
(c) Anti-tank missile.
(d) None of the above.
Ans: (c)
Related facts:-

  • On June 13, 2017, the Defense Research and Development Organization (DRDO) successfully tested the indigenously built Anti-Tank Missile ‘Nag’ in a desert area of western sector of Rajasthan.
  • This is a third-generation missile in the ‘Fire and forget’ category, which is equipped with advanced imaging infrared radar.
  • It is one of the five missile systems developed by DRDO under integrated guided missile development program (IGDP).
  • The other four missiles developed under this program are ‘Agni’, ‘Akash, Trishul’ and ‘Prithvi’, respectively.
  • The missile was developed at a cost of US $ 46.6 million.

Related Links:-
http://indiatoday.intoday.in/story/drdo-successfully-test-fires-nag-missile/1/978135.html
http://defencenews.in/article/DRDO-Successfully-Test-fires-Anti-tank-Nag-Missile-Nag-in-Rajasthan-262585

GSLV Mk III-D1 Successfully launches GSAT-19

Country’s heaviest satellite launched

Question- Which one of the below is the country’s heaviest satellite launched by Indian Space Research Organization (ISRO) on June 5, 2017?
(a) GSAT-18
(b) GSAT-19
(c) GSAT-21
(d) GSAT-17
Ans :(b)
Related facts:-

  • On June 5, 2017, Indian Space Research Organization (ISRO) successfully launched the country’s heaviest satellite GSAT-19 by its heaviest launch vehicle GSLV Mk III-D1 from the Second Launch Pad at Satish Dhawan Space Centre Sriharikota.
  • GSAT 19, weighing 3136 kg at lift-off, is the heaviest satellite launched from the Indian soil.
  • The GSAT-19, a communication satellite, expected to enhance India’s communication infrastructure, was placed into a Geosynchronous Transfer Orbit (GTO), 16 minutes after launch, with a perigee (closest point to Earth) 170 km and apogee (farthest point from Earth) 35,975 km.
  • The GSAT-19 carries a Ka/Ku-band high throughput communication transponders. It also carries a Geostationary Radiation Spectrometer (GRASP) payload to monitor and study the nature of charged particles and the influence of space radiation on satellites and their electronic components
  • This successful launch will enable India to launch 4-tonne class satellites from India.
  • These were earlier launched from launch pads abroad.
  • The GSAT-19 satellite was built in Space Application Center, Ahmedabad.
  • Launch Vehicle GSLV Mark-3D-1 is 43.43 meter long and weighing 640 tonnes.
  • This rocket is able to take away, 4000 kg payload in geo-synchronous transfer orbit and the payload of 10 thousand kg can be taken by it in the lower orbit of the Earth.
  • Till now ISRO was dependent on foreign launchers for the launch of communication satellites weighing more than 2,300 kg.
  • Earlier, the communication satellite GSAT-18 was launched from Kouru Launch site of French Guyana on October 6, 2016 from European Arian-5 VA-231 launch vehicle.

Related Links:-
http://isro.gov.in/launcher/gslv-mk-iii-d1-gsat-19-mission
http://isro.gov.in/launchers/gslv-mk-iii
http://isro.gov.in/Spacecraft/gsat-19

Prithvi-II missile successfully test-fired

Prithvi-II missile successfully test-fired

Question: What is the strike range of Prithiv-II missile?
(a) 200 Km
(b) 250 Km
(c) 300 Km
(d) 350 Km
Ans: (d)
Related Fact :

• On June 2, 2017 India successfully test-fired its indigenously developed nuclear-capable Prithvi-II missile from a test range in Odisha as part of a user trial by the Army.
• The trial of the Prithvi-II missile was carried out from a mobile launcher from launch complex-3 of the Integrated Test Range) at Chandipur near Balasore in Odisha.
• Prithvi –II is a surface to surface missile and has a strike range of 350 km.
• The Prithvi-II missile is capable of carrying 500 kg to 1,000 kg of warheads and is thrusted by liquid propulsion twin engines. It uses advanced inertial guidance system with manoeuvring trajectory to hit its target with precision and accuracy.
• Prithvi-II was randomly chosen for test from the production stock. Launch activities were carried out by the specially formed strategic force command and monitored by the scientists of the Defence Research and Development Organisation (DRDO) as part of training exercise.
• The missile trajectory was tracked by the DRDO radars, electro-optical tracking systems and telemetry stations located along the coast of Odisha.

Good to Know:
Prithvi-II missile was developed under the Integrated Guided Missile Development Programme (IGMDP). This programme was conceived by renowned scientist and late former President of India, Dr. APJ Abdul Kalam to enable India attain self sufficiency in the field of missile technology. This programme was approved by the government on July 26, 1983. The missiles developed under IGMDP were:

• Short range surface-to-surface missile (code-named Prithvi)
• Intermediate range surface-to-surface missile (code-named Agni)
• Short range low-level surface-to-air missile (code-named Trishul)
• Medium range surface-to-air missile (code-named Akash)
• Third-generation anti-tank missile (code-named Nag).

The Agni missile was initially conceived in the IGMDP as a technology demonstrator project in the form of a re-entry vehicle, and was later upgraded to a ballistic missile with different ranges. As part of this program, the Interim Test Range at Balasore in Orissa was also developed for missile testing.
Variants of Prithvi Missile: 

Missile Warhead Payload (kg) Range (km) Fuel/Stages Weight (kg) In service
Prithvi-I Nuclear, HE, submunitions, FAE, chemical 1,000 150 Single stage liquid 4,400 1988
Prithvi-II Nuclear, HE, submunitions, FAE, chemical 350–750 350 Single stage liquid 4,600 1996
Prithvi-III Nuclear, HE, submunitions, FAE, chemical 500–1,000 350–600 Single stage solid 5,600 2004

Reference:
http://www.thehindu.com/news/national/prithvi-ii-missile-successfully-test-fired/article18705455.ece?utm_source=pushnotifications&utm_campaign=pushnotifications
http://www.brahmos.com/content.php?id=10&sid=25

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