Foundations — Sarabhai & INCOSPAR
India's space journey began not with rockets but with a visionary physicist and a borrowed church. In 1962, Prime Minister Jawaharlal Nehru and the Department of Atomic Energy established INCOSPAR — the Indian National Committee for Space Research — under the chairmanship of Dr. Vikram Ambalal Sarabhai. Sarabhai, a physicist educated at Cambridge and trained under C.V. Raman, became the undisputed father of India's space programme.
The first rocket launching station was set up at Thumba near Thiruvananthapuram (Kerala) — renamed the Thumba Equatorial Rocket Launching Station (TERLS). The choice of Thumba was deliberate: it lies very close to the magnetic equator, making it ideal for studying the ionosphere. The first sounding rocket — a Nike Apache supplied by NASA — was launched from Thumba on 21 November 1963, with sodium vapour payload. The launch control was a converted bishop's residence; the church of St. Mary Magdalene served as the workshop. The iconic image of scientists transporting rocket parts on a bicycle became a symbol of India's frugal innovation.
1968 — the only UN-recognised rocket launching facility in the world.
Sarabhai's vision was explicitly developmental: space technology should serve India's masses through communication, weather forecasting, resource mapping and education — not prestige. He famously argued, "We do not have the fantasy of competing with the economically advanced nations in the exploration of the Moon or the planets or manned space-flight. But we are convinced that if we are to play a meaningful role nationally, and in the community of nations, we must be second to none in the application of advanced technologies to the real problems of man and society."
1962 → TERLS Thumba 1963 (first rocket) → ISRO 1969. Sarabhai = Father of Indian Space Programme. He died on 30 December 1971 — ISRO was barely two years old when it lost its founder.
ISRO — 1969 & Early Missions
On 15 August 1969, INCOSPAR was formally transformed into the Indian Space Research Organisation (ISRO), with Dr. Vikram Sarabhai as its first chairman. ISRO was placed under the Department of Atomic Energy. After Sarabhai's death in 1971, M.G.K. Menon served briefly, followed by Satish Dhawan — under whose chairmanship (1972–1984) ISRO's institutional framework solidified. The Space Commission and Department of Space were established in 1972; the Prime Minister chairs the Space Commission.
India's first satellite, Aryabhata, was launched on 19 April 1975 — but by a Soviet Cosmos-3M rocket from Kapustin Yar, not an Indian vehicle. Named after the 5th-century Indian mathematician-astronomer, Aryabhata carried scientific payloads in X-ray astronomy, solar physics and aeronomy. A power failure silenced it after four days, but its launch demonstrated India's ability to design and build satellites.
Bhaskara-I (1979) and Bhaskara-II (1981) were experimental earth observation satellites, again launched by Soviet vehicles. The APPLE (Ariane Passenger Payload Experiment) satellite of 1981 — India's first geostationary communication satellite, launched by Ariane — was tested using a bullock cart to transport it to the launch pad, another symbol of Indian jugaad.
19 April 1975. It was built by ISRO but launched by the Soviet Union. Do not confuse with Aryabhata the mathematician. The satellite appears on the Indian ₹2 note (historical series). ISRO's first indigenously launched satellite was Rohini RS-1 via SLV-3 in 1980.
Launch Vehicles — SLV to GSLV
The development of indigenous launch vehicle capability was the critical bottleneck. The SLV-3 (Satellite Launch Vehicle-3) project, led by A.P.J. Abdul Kalam, was India's first attempt. The first developmental flight on 10 August 1979 failed — the Rohini satellite fell into the Bay of Bengal. But the second flight on 18 July 1980 succeeded: Rohini RS-1 was placed in low earth orbit, making India the sixth country in the world to develop launch vehicle technology.
The ASLV (Augmented SLV, 1987–1994) was an intermediate vehicle that had mixed results — its first two flights failed. The real leap came with the PSLV (Polar Satellite Launch Vehicle). After a failed first attempt in 1993, PSLV achieved its first successful flight on 15 October 1994. PSLV became the workhorse of the Indian space programme — remarkably reliable, able to launch payloads into polar and sun-synchronous orbits, and later into geosynchronous transfer orbits. In 2017, a single PSLV-C37 launch set a world record by deploying 104 satellites in one mission.
The GSLV (Geosynchronous Satellite Launch Vehicle), needed to launch heavier communication satellites, faced more difficulties. The critical challenge was the cryogenic engine — using liquid hydrogen and oxygen — which India had to develop indigenously after Russia could not transfer the technology under US pressure. India mastered cryogenic technology independently, achieving the first successful GSLV-Mk III (now renamed LVM3) flight with indigenous cryogenic engine in 2014.
| Vehicle | First Success | Role | Key Fact |
|---|---|---|---|
| SLV-3 | 18 July 1980 | Small LEO | Led by A.P.J. Kalam; India's 6th country |
| ASLV | May 1992 | Experimental | First 2 flights failed |
| PSLV | 15 Oct 1994 | Polar/SSO | Most reliable; 104 satellites 2017 |
| GSLV Mk I/II | 2001 (partial) | GTO | Cryogenic engine challenges |
| GSLV Mk III / LVM3 | 2014 | Heavy GTO | Indigenous cryo engine; launched Chandrayaan-3 |
Remote Sensing & Communication Satellites
Consistent with Sarabhai's developmental vision, two satellite series became the backbone of practical applications: IRS and INSAT.
The IRS (Indian Remote Sensing) satellite series, beginning with IRS-1A in 1988, gave India one of the largest civil remote sensing constellations in the world. IRS satellites monitor agriculture, forestry, water resources, urban planning and disaster management. The Cartosat series provides high-resolution cartographic imagery used in defence and mapping. The RISAT (Radar Imaging Satellite) series uses synthetic aperture radar to image through clouds — critical for flood monitoring and strategic purposes.
The INSAT (Indian National Satellite System) series, beginning with INSAT-1B in 1983 (the first successful one — INSAT-1A failed), revolutionised telecommunications and weather forecasting in India. INSAT satellites carry transponders for Doordarshan, All India Radio, and the VSAT networks of banks and railways. EDUSAT (2004) was exclusively dedicated to educational television — the world's first satellite dedicated to education.
1982) failed within months of launch. The first truly operational INSAT was INSAT-1B launched on 30 August 1983. A common trap: "India's first INSAT satellite was INSAT-1A" — technically true, but it failed. The first successful operational INSAT was 1B.
India also operates the NavIC (Navigation with Indian Constellation) system — India's own regional navigation satellite system providing position accuracy within ~5 metres over India and surrounding region (2,500 km). NavIC has 7 operational satellites and became fully operational by 2018. It is India's answer to GPS (USA), GLONASS (Russia), Galileo (EU) and BeiDou (China).
Chandrayaan-1 — India Reaches the Moon (2008)
On 22 October 2008, India launched Chandrayaan-1 — the country's first lunar probe — aboard PSLV-C11. The mission was a landmark in multiple ways. The orbiter carried 11 scientific instruments from ISRO, NASA, ESA and other agencies. The Moon Impact Probe (MIP) was released and crash-landed on the Moon's south polar region on 14 November 2008, on Jawaharlal Nehru's birthday, making India the fourth country to place its flag on the Moon (after USSR, USA and ESA/Japan probes).
Most significantly, Chandrayaan-1's Moon Mineralogy Mapper (M3) — a NASA instrument — confirmed the presence of water ice molecules on the lunar surface in 2009. This was one of the most important lunar discoveries in decades, validating the scientific rationale for lunar exploration and future colonisation. The mission lost contact on 28 August 2009 (about 312 days into the planned 2-year mission) due to radio contact failure.
22 Oct 2008. First Indian lunar mission. Confirmed water ice on Moon (via NASA's M3). Contact lost Aug 2009. Mission director: M. Annadurai. Four years later, NASA used Earth-based radar to locate the spacecraft still orbiting the Moon.
Mangalyaan — India's Mars Orbiter Mission (2013–2022)
On 5 November 2013, ISRO launched the Mars Orbiter Mission (MOM), popularly called Mangalyaan, aboard PSLV-C25. On 24 September 2014, Mangalyaan successfully entered Mars orbit, making India:
- The first Asian country to reach Mars orbit
- The first country in the world to succeed in its very first attempt at Mars
- Only the fourth space agency after NASA, Roscosmos and ESA to reach Mars
The mission cost approximately ₹450 crore (~$74 million) — cheaper than the Hollywood film Gravity released the same year. ISRO achieved this through frugal engineering: the spacecraft weighed only 1,337 kg with just 15 kg of scientific instruments, using a highly elliptical orbit to save fuel. The mission was designed and executed in under 15 months — a record timeline. Mangalyaan operated for nearly 8 years (well beyond its planned 6–10 month mission life) before communication was lost in September 2022.
Chandrayaan-3 — The South Pole Landing (2023)
After Chandrayaan-2's lander Vikram crashed during its final descent on 7 September 2019 (the orbiter continues to function), ISRO redesigned and re-launched. Chandrayaan-3 was launched on 14 July 2023 aboard LVM3-M4. On 23 August 2023, the lander Vikram (named after Vikram Sarabhai) achieved a successful soft landing near the Moon's south pole — at approximately 69.37°S latitude. The rover Pragyan ("Wisdom" in Sanskrit) was deployed and operated for about 14 Earth days.
This mission made India:
- The first country in the world to soft-land near the lunar south pole
- Only the fourth country (after USA, USSR/Russia, China) to achieve a soft landing anywhere on the Moon
The south pole significance: permanently shadowed craters near the lunar poles are believed to contain large deposits of water ice — a critical resource for future lunar bases and for producing rocket fuel. Pragyan's instruments detected sulphur and other elements. 23 August has been declared National Space Day in India. The landing point was named Shiv Shakti Point.
14 July 2023. Landing 23 August 2023. Lander = Vikram. Rover = Pragyan. Landing site = Shiv Shakti Point. 23 August = National Space Day. First country at lunar south pole. ISRO Chairman at the time: S. Somanath. Russia's Luna-25 attempted south pole landing just days before but crashed.
Quick Reference — ISRO Missions & Milestones
| Year | Mission/Event | Significance |
|---|---|---|
| 1962 | INCOSPAR founded | Vikram Sarabhai; start of Indian space programme |
| 21 Nov 1963 | First rocket launch, Thumba | Nike Apache; sodium vapour payload |
| 1969 | ISRO established (15 Aug) | Replaced INCOSPAR; Sarabhai first chairman |
| 1972 | Department of Space created | PM chairs Space Commission |
| 19 Apr 1975 | Aryabhata satellite | First Indian satellite; launched by USSR |
| 18 Jul 1980 | SLV-3 / Rohini RS-1 | First indigenous launch; A.P.J. Kalam; India 6th nation |
| 15 Oct 1994 | PSLV first success | Workhorse vehicle; polar/SSO capability |
| 22 Oct 2008 | Chandrayaan-1 | First Indian lunar mission; confirmed water ice on Moon |
| 5 Nov 2013 | Mangalyaan launched | First Asian Mars mission |
| 24 Sep 2014 | Mangalyaan enters Mars orbit | First country to succeed on first attempt |
| 2017 | PSLV-C37 | World record: 104 satellites in one launch |
| 2018 | NavIC fully operational | India's regional navigation system (7 satellites) |
| 14 Jul 2023 | Chandrayaan-3 launched | LVM3; lander Vikram + rover Pragyan |
| 23 Aug 2023 | Chandrayaan-3 landing | First country at lunar south pole; National Space Day |
Examiner Traps — Common UPSC Errors
1975) = first Indian satellite but launched by USSR. Rohini RS-1 (1980) = first satellite launched by an Indian vehicle (SLV-3). UPSC often asks which was "first" — answer depends on the qualifier.
1962 (under DAE, Nehru era). ISRO = 1969 (15 August; replacing INCOSPAR). Sarabhai founded both but died in 1971 — ISRO was only ~2 years old when he passed.
14 July 2023; landing 23 August 2023. The 40-day journey (longer than Apollo's 4 days) was by design — ISRO used Earth's gravity to slingshot the spacecraft, saving fuel. National Space Day = 23 August.
2016 — separate from NavIC but often appears in same context.
Frequently Asked Questions
Who is called the father of India's space programme?
Dr. Vikram Ambalal Sarabhai is universally recognised as the father of India's space programme. He established INCOSPAR in 1962, founded the Thumba rocket launching station (TERLS), and later became the first chairman of ISRO in 1969. His developmental philosophy — that space technology should serve ordinary Indians through communication, weather and resource mapping — remains ISRO's guiding vision. He died on 30 December 1971 at Kovalam, Kerala.
How did Chandrayaan-3 differ from Chandrayaan-2?
Chandrayaan-2 (July 2019) comprised an orbiter, lander (Vikram) and rover (Pragyan). The orbiter works fine; the lander crashed on 7 September 2019 during final descent. Chandrayaan-3 (2023) was redesigned: it had no orbiter (used Chandrayaan-2's orbiter as relay), and introduced a propulsion module. The lander legs were strengthened, the failure modes of Chandrayaan-2 were addressed, and the landing sequence was made more robust. It successfully soft-landed on 23 August 2023 near the lunar south pole — a first for any country.
What records did the PSLV-C37 mission set in 2017?
On 15 February 2017, PSLV-C37 launched 104 satellites in a single mission — setting a world record at the time (surpassing Russia's previous record of 37). Of these, 96 were nano-satellites from the USA, 1 was India's own Cartosat-2 series satellite, and the rest from other countries. The satellites were deployed in a sun-synchronous polar orbit at ~505 km altitude. This mission demonstrated ISRO's commercial launch capability and established Antrix Corporation (ISRO's commercial arm) as a global player.
What is NavIC and how does it differ from GPS?
NavIC (Navigation with Indian Constellation) is India's own regional satellite navigation system. It provides position accuracy within approximately 5 metres over India and surrounding regions (up to ~1,500 km beyond India's borders). NavIC has 7 operational satellites — 3 in geostationary orbit and 4 in geosynchronous orbit. GPS (USA) is a global system with 24+ satellites. NavIC's advantage is independence from foreign navigation systems for military and strategic applications. India mandated NavIC chips in all smartphones sold in India starting 2023.
What was significant about Mangalyaan's cost?
Mangalyaan cost approximately ₹450 crore (~$74 million) — making it the least expensive interplanetary mission in history at the time. For comparison, NASA's MAVEN Mars mission (launched on the same day, 5 November 2013) cost ~$671 million. Hollywood's space film Gravity (2013) had a production budget of ~$100 million — more than Mangalyaan. This frugal achievement was possible through reuse of existing PSLV technology, minimal redundancy, a small spacecraft, and a longer transit trajectory using Earth's gravity assist.