ISRO: A Detailed Study

Nov 2021|🟢Current|10 min read|134 entries

Key Takeaway

Indian Space Research Organization (ISRO) is the space research organization of India.

Last verified: 12 Feb 2026·Source: www.pscarivukal.com

ISRO: A Detailed Study

Indian Space Research Organization (ISRO) is the space research organization of India. Currently, it ranks 6th among the largest space agencies in the world.

In this post, we are trying to cover everything there is to know about ISRO, including all the exam-relevant points.

For Kerala PSC, UPSC, and all other important competitive examinations, there are generally one or two GK questions about ISRO in the Science & Technology / Current Affairs section.

Basic Facts(8)

Headquarters
Antariksh Bhavan, Bangalore
Vision
Harness space technology for national development while pursuing space science research and planetary exploration
First Chairman
Homi J. Bhabha
Father of ISRO
Dr. Vikram Sarabhai
First Chairman
Dr. Vikram Sarabhai
First Malayali Chairman
M.G.K. Menon
Longest Served Chairman
Dr. Satish Dhawan
CurrentISROChairman
S. Somanath

- Department of Space (DOS) & the Space Commission –1972(5)

Indian astronauts are commonly known as
Vyomnauts
Marketing Firm of ISRO
Antrix Corporation Limited (ACL)
Established
1992
Commercial Arm of ISRO
NewSpace India Limited (NSIL)
Established
March 2019

History(10)

Established in
1962
Location
Thiruvananthapuram
Former name
Thumba Equatorial Rocket Launching Station (TERLS)
Mecca of Rocket Science in India
St. Mary's Magdalene Church (now Space Museum)
First Satellite Launched from TERLS
Nike Apache
Launched on
1963 November 21
First indigenously built rocket launched from TERLS
Rohini (RH 75)
Launched in
1967
Weight
32 kg
Renamed as VSSC in
1972

Sriharikota(5)

Established in
1971
Epithet
Spaceport of India, Cape Kennedy of India
Former name
Sriharikota Range
Renamed as
Satish Dhawan Space Center (2002)
Lake near Satish Dhawan Space Center
Pulicat Lake

Rockets & Launch Vehicles

Launch vehicles or launchers or carrier rockets are rocket-propelled vehicles designed to transport a spacecraft or a satellite from the Earth's surface to outer space.

Did you know the first man to use rockets in India was Tipu Sultan?

The launchers are mainly classified into 3. They are

  • First Generation Launchers.
  • Operational Launchers.

They are mainly divided into 2 categories. They are(2)

Sounding Rockets
One or two-stage propellant rockets, eg:Nike Apache, Rohini;mainly for research and meteorological purposes
Operational Sounding Rockets
SLV & ASLV come under this category

SLV (Satellite Launch Vehicle)(104)

Stages
4
Height
22.7 mWeight– 17 Ton
Payload capability
40 Kg
First indigenously built launching vehicle
SLV-3First experimental flight of SLV-3- 1979 August 10
Status
Partially successful
First Indian satellite to be successfully placed in orbit by SLV-3
Rohini (RS -1)
Launched on
1980 July 18
First Indian satellite to be launched successfully on an indigenously built launcher
Rohini
ASLV (Augmented Satellite Launch Vehicle)Stages
5
Height
23.5 mWeight– 40 Ton
Payload capability
150 Kg
First Launch
1987 March 24
First Successful Launch
ASLV-D3.1992 May 20
Epithets
The Workhorse of ISRO, The Forex earner
Stages
5
Height
44 mWeight –40 Ton
Payload capability
1500 Kg
Reach
600-900 km.4 part system: first & third stage uses solid fuel, second & fourth stages uses liquid fuel. Strap-on motors are also used with PSLV to augment the thrust
Multiple Satellite Launch Capability.3 variants are deployedPSLV
CA (Core Alone)PSLV QLPSLV XL  (Chandrayaan I & Mangalyaan)PSLV C21 – 100th space mission of ISRO
Launched on
2012 September 9.21st successful PSLV flights in a row.PSLV C50is another variant that uses PSLV QL with 4 strap on boosters and will be used to launch RISAT & 9 small foreign satellites from Japan, Italy, Israel & USSo far, PSLV has launched50 Indian Satellites & 222 Foreign satellitesfor 20 countries worldwide
GSLV (Geosynchronous Satellite Launch Vehicle)Stages
3
Height
49.13 mWeight– 414.75 tonnesPayload capability-  2500 Kg
Reach
36,000 km
Variants
GSLV Mk. I & GSLV Mk. II
Stages
3
Height
43.43 mWeight– 640 tonnesPayload capability– 4000Kg
First Launch
2014 December 18
Designed to carry 4 ton class of satellites into Geosynchronous Transfer Orbit (GTO) or about 10 tons to Low Earth Orbit (LEO)Successfully Launched
GSAT-19 (GSLV-Mk III-D1)GSAT-29 (GSLV MkIII-D2)Chandrayaan-2 (GSLV MkIII-M1)
First Indian satellite
AryabhataLaunched on – 1975, April 19
Launcher
InterCOSMOS
Second Indian Satellite
Bhaskara Sega-I
Launched on
1979 June 7
First Indian (indigenous) experimental Communication Satellite
APPLE (Ariane Passenger Payload Experiment)
Launched on
1981 June 19
First Meteorological Satellite launched by ISRO
Kalpana 1Former Name – METSAT
Launched on
2002 September 12
Launched from
Sriharikotta
Launch Vehicle
PSLV C4
Renamed as Kalpana 1 in
A.B. Vajpayee (2003 February 5)
First Indian Remote Sensing Satellite
CARTOSAT–1
Launched on
2005 May 5
Launched from
Sriharikotta
Launch Vehicle
PSLV- C6
Uses
For preparing maps
First Satellite built by an Indian University
ANUSAT (Anna University)Launched on – 2009 April 20
Launched from
Sriharikotta
Launch Vehicle
PSLV-C12
First Nano Satellite
Jugnu
Launched on
2011 October 12
Launched from
Sriharikotta
Launch Vehicle
PSLV-CA C18
Launched by
IIT Kanpur
Under the guidance of
Dr.  N. S. Vyas
Uses
For providing data for disaster management and agriculture
First Indigenously built Radar Imaging Satellite
RISAT 1Launched on – 2012 April 26
Launched from
Sriharikotta
Launch Vehicle
PSLV C19
First dedicated multi-wavelength space observatory of India
ASTROSAT
Indigenously built Heaviest Satellite of India
GSAT 11 (5854 Kg)
Launched on
2018 December 5
Launched from
Kourou, French Guiana
Heaviest satellite launched from India
GSAT 29Launched on – 2018 November 14
Launched from
Sriharikotta
Smallest and Lightest Satellite in the World
KalamSAT (2019)
Weight
64gms
Designed by
Rifath Sharook;Took part in the global competition "Cubes in Space," for children aged 11 – 18, and his design was selected by NASA
Sponserd by
SpaceKidz (Chennai)
Launched by
NASA
Second Satellite Launch Port (Planned)
Thoothukudi (Tamil Nadu)
Space MissionsChandrayaan I (2008)First Lunar Mission of India.4th nation in the world to send a lunar mission.ISRO Chairman
G. Madhavan Nair
Project Director
M. Annadurai
Weight
1380 Kg
Total Cost
₹ 386 cr
Launched on
2008 October 22
Launched from
Sriharikotta
Launch Vehicle
PSLV C11
Chandrayaan II (2019)Second Lunar Mission of India.ISRO Chairman
K. Sivan
Project Director
Muthayya Vanitha
Mission Director
Ritu Karidhal
Weight
3,877 kg
Total Cost
₹ 978 cr
Launched on
2019 July 22
Launched from
Satish Dhawan Space Centre, SriharikotaLander –Vikram
Rover
Pragyan
Launch Vehicle
GSLV Mk III-M1
MangalyaanFirst Asian nation to reach Mars
India
Launched on
2013 November 5
Launched from
Satish Dhawan Space Centre, SriharikotaLaunch Vehicle – PSLV-C25.In association with Fiji
Reached Mars Orbit on
2014 September 24
With the help of Russia & France.No. of people being sent to space
3. (4 are undergoing training)
Launch Vehicle
GSLV Mk III-M1
Estimated Cost
₹ 10,000 cr
Project Director
R. Hutton
Malayali scientist associated with Gaganyaan
V.R. Lalithambika
Humanoid Robot developed for Gaganyaa
Vyommitra
Satish Dhawan Space Centre, SriharikotaSpace Applications Centre, AhmedabadVikram Sarabhai Space Centre, ThiruvananthapuramIndian Institute of Space Science & Technology, Valiyamala, Thiruvananthapuram (2007)Inaugurated by
G. Madhavan Nair
NewSpace India Limited (NSIL), Bengaluru (2019)* Founder
Dr. Vikram Sarabhai.📝SideNotes:August 12 –National Remote Sensing Day (Birthday of Dr. Vikram Sarabhai)
Father of Space Science in the world
Konstantin Eduardovich Tsiolkovsky (Russia)
Father of the Indian Space Programme
Dr. Vikram Sarabhai
Missile Man of India
Dr. A.P.J. Abdul Kalam
Missile Woman of India
Dr. Tesy Thomas
Rocket Man of India
Dr. K. Sivan
Rocket Woman of India
Ritu Karidhal
First female Project Director of an interplanetary mission in India
Muthayya Vanitha (Chandrayaan-2)