Indian Space Research Organisation(ISRO)'s Aryabhatta(April 1975) To Chandrayaan(July 2019)

ISRO's space odyssey started on August 15, 1969.

Within six years it achieved its first milestone on April 19, 1975 when the first Indian satellite -- Aryabhatta -- successfully entered outer space with the help of the Soviet space agency. Weighing 360 kg, Aryabhatta had a mission life of just six months. For India, that was its 'one small step, one giant leap' moment.

In many ways, the scale of Isro's space odyssey can be understood from how it journeyed from the age of Aryabhatta in 1975 to the age of something as complex as Chandrayaan-2 in 2019.

In this period, Isro sent 105 Indian satellites into space, developed its own independent launch systems, carried out 75 launches, reached the Moon twice, successfully sent a spacecraft orbiting Mars, besides sending 297 satellites of 33 countries and 10 satellites designed and built by Indian students

Of the 75 launches that Isro has carried out till date, only eight were unsuccessful. Besides this, two satellites failed in their orbits after being successfully launched while one suffered partial failure.

ISRO’s Timeline of Space Programme  

1960's: Journey of the formation of ISRO

Year	About Mission
1962	The Indian National Committee for Space Research is formed under the leadership of Vikram Sarabhai who is also known as father of India's space program and physicist Kalpathi Ramakrishna Ramanathan.
1963	The first sounding rocket is launched from Thumba Equatorial Rocket Launching Station in Kerala which is used for probing upper atmospheric regions and space research. It marks the beginning of the Indian space program.
1965	Space Science and Technology Centre (SSTC) was established in Thumba on 1 Jan, 1965.
1967	Satellite Telecommunication Earth Station set up at Ahmedabad on 1 Jan 1967
1968	Experimental Satellite Communication Earth Station set up in Ahmedabad, Gujarat
1969	Indian Space Research Organisation (ISRO) was formed to harness space technology for national development.

1970s: Era of launching Satellites began

Year	About Mission
1971	Satish Dhawan Space Centre formed in Sriharikota, Andhra Pradesh.
1972	Department of Space (DoS) established and ISRO brought under it.
1975	On 19 April, first Indian Satellite, Aryabhata was launched into space. It marked a milestone in India's space programme because it was completely designed in the country and launched from a Russian facility.
1977	Satellite Telecommunication Experiments Project
1979	The first experimental remote-sensing satellite which was built in India was launched namely Bhaskara-I. The images send by it are used to study hydrology and forestry and oceanographic studies.

1980s: Satellite launch Vehicle, Communication satellite, remote sensing satellite launched

Year	About Mission
1980	India's first experimental satellite vehicle was launched namely Satellite launch Vehicle-3 (SLV-3) which makes ISRO sixth nation in space program. SLV-3 launched second time with Rohini. The mission was successful.
1981	Rohini placed into orbit.
1982	Communication Satellite Insat-1A was launched
1983	Second developmental flight of SLV-3 placed Rohini into orbit.
1984	A joint manned mission of India and Soviet Union has been launched. In this mission the first Indian cosmonaut, Rakesh Sharma, spends eight days in Russian space station Salyut 7.
1987	ASLV was launched with SROSS-1 satellite.
1988	Indian Remote Sensing Satellite IRA-1A was launched

1990s: Era of PSLV

Year	About Mission
1991	Remote Sensing satellite IRS-1B was launched
1992	ASLV first time was successfully launched
1993	Developed in 1990s and has become the Indian space mission's most reliable workhorse. In 1993, PSLV carried out its first mission and its first successful mission was held in next year. No doubt for next 20 years, it launched several satellites for historic missions like Chandrayaan and Mangalyaan.
1994	Successful launch of PSLV with IRS-P2
1996	PSLV was launched with IRS-P3
1997	PSLV was launched with IRS-1D
1999	PSLV started carrying foreign satellites

2000s: GSLV and Chandrayaan-1 important missions was launched

Year	About Mission
2001	GSLV was successfully launched
2002	Kalpana-1 satellite was launched
2003	GSat-2 was launched
2004	Edusat was launched
2005	Launch of Cartosat-1 and Hamsat by PSLV
2006	GSLV was launched with Insat-4C
2007	Cartosat-2 was launched
2008	India's Chandrayaan-1 first moon mission was launched by PSLV. Almost a decade ago, India's first unmanned lunar probe was launched and was a landmark in India's space mission. Do you know that after this ISRO joined an elite list of just six space organisations to send an Orbiter to the moon? A Tricolour was hosted on the moon but ISRO lost contact with Chandrayaan-1 soon after.
2009	Radar Imaging Satellite (Risat-2) was launched
2010	Launch of Cartosat-2B, STUDSAT and three small foreign satellites by PSLV

2010s: Mangalyaan, Chandrayaan-2 important launches

Year	About Mission
2011	Launch of Resourcesat-2 and two small satellites by PSLV
2012	Risat-1 was launched by PSLV
2013	- PSLV-C22 was successfully launched with India's first indigenous Regional Navigation Satellite IRNSS-1A on 1st July, 2013. - PSLV-C25/Mars Orbiter Mission was launched in 5 November, 2013
2014	- GSLV-D5 was successfully launched on 5 January, 2014. - India's first interplanetary mission to the planet Mars known as Mars Orbiter mission (MOM) or Mangalyaan was launched. On 24 September, 2014, MOM entered Mars orbit. India became the first country in the world to insert a spacecraft into the Martian orbit in its very first attempt. - On 18 December, 2014, GSLV Mk-III, the first experimental flight of ISRO's heaviest and upgraded rocket vehicle was launched from Sriharikota.
2015	- India's 4th navigation satellite was launched. - 100 days of Mangalyaan. - 5 British satellites are launched by ISRO. - On 28 September, 2015, India's first dedicated multi-wavelength space observatory Astrosat was successfully launched onboard a PSLV-C30 rocket. - On 11 November, 2015, latest communication satellite of India GSAT-15 was successfully launched by Ariane-5 rocket from the spaceport of Kourou in French Guiana. - On 16 December, 2015, PSLV-C29, in its 32 flight, launched six satellites of Singapore. Of these six satellites, TeLEOS-1 is the primary satellite whereas the other five are co-passenger satellites.
2016	- On 20 January, 2016 PSLV-C31 in its 33rd flight launches IRNSS-1E, the fifth satellite of the Indian Regional Navigational Satellite System (IRNSS). - On 10 March, 2016, PSLV-C32 in its 34rth flight, launches IRNSS-1F, the sixth satellite of the Indian regional navigational Satellite System (IRNSS).This is the thirty third consecutively successful mission of PSLV. - On 28 April, 2016, PSLV-C33 in its 35th flight, launches IRNSS-1G, the seventh satellite of the Indian Regional Navigation Satellite System (IRNSS) to a Sub-Geosynchronous Transfer Orbit (Sub-GTO). - On 23 May, 2016, RLV-TD was successfully flight tested. - On 22 June, 2016, PSLV-C34, in its 36 flight launches the 727.5 kg Cartosat-2 Series Satellite for earth observation and 19 co-passenger satellites together weighing about 560 kg at lift-off into a 505 km polar Sun Synchronous Orbit (SSO). - On 28 August, 2016, The first experimental mission of ISRO’s Scramjet Engine towards the realisation of an Air Breathing Propulsion System was successfully conducted. - On 8 September, 2016, GSLV-F05 is the tenth flight of India's Geosynchronous Satellite Launch Vehicle (GSLV), launching INSAT-3DR, an advanced weather satellite, weighing 2211 kg into a Geostationary Transfer Orbit (GTO). - On 26 September, 2016, PSLV-C35, in its 37th flight, launches SCATSAT-1 for weather related studies and 7 co-passenger satellites into polar Sun Synchronous Orbit (SSO). - On 6 October, 2016, India's latest communication satellite GSAT-18 was inducted into the INSAT/GSAT system.
2017	On 15 February, 2017, ISRO successfully launched 104 satellites using a single rocket from Sriharikota Space Centre. On 5 May, 2017, GSLV successfully launches South Asia Satellite. - On 5 June, 2017, First developmental flight of India's GSLV Mk III successfully launches GSAT-19 Satellites. - On 23 June, 2017, PSLV-C38 successfully launches 31 Satellites in a single flight. - On 29 June, 2017, India's GSAT-17 Communication Satellite launches successfully. - On 31 August, 2017, PSLV-C39 flight carrying IRNSS-1H Navigation Satellite unsuccessful.
2018	- On 12 January, 2018 PSLV successfully launches 31 Satellites in a single flight. - On 23 March, 2018 ISRO-BHEL tie up for the production of Space Grade Lithium-Ion Cells. - On 29 March, 2018 GSLV successfully launches GSAT-6A Satellite. - On 12 April, 2018 PSLV-C41 successfully launches IRNSS-11 Navigation Satellite. - On 25 April, 2018 GSAT-11 launch rescheduled. - 22 June, 2018, discovery of a Sub-Saturn like Planet around a Sun-like star. - On 16 September, 2018 PSLV-C42 launches 2 foreign satellites. - On 14 November, 2018 GSLV MkIII-D2 successfully launches GSAT-29. - On 29 November, 2018 PSLV-C43 successfully launches HysIS and 30 customer satellites. - On 5 December, 2018, GSAT-11 India's heaviest communication satellite launched successfully from French Guiana. - On 19 December, 2018, GSLV-F11 successfully launches GSAT-7A
2019	- On 25 January, 2019, PSLV-C44 successfully launched Microsat-R and Kalamsat-V2. - On 6 February, 2019 GSAT-31 India's Communication Satellite launched successfully from French Guiana. - On 1 April, 2019 PSLV-C45 successfully launches EMISAT and 28 customer satellites. - On 22 May, 2019 PSLV-C46 successfully launches RISAT-2B - On 15 July, 2019 Chandrayaan-2 Moon Mission launched.