The Satellite Launch Vehicle (Hindi: उपग्रह प्रक्षेपण यान), or SLV was a project started in the early 1970s by the Indian Space Research Organisation to develop the technology needed to launch satellites. The project was headed by APJ Abdul Kalam. SLV was intended to reach a height of 400 kilometres (250 mi) and carry a payload of 40 kg (88 lb). The first experimental flight of SLV-3, in August 1979, was a failure.
It was a four-stage rocket with all solid-propellant motors.
The first launch of the SLV took place in Sriharikota on 10 August 1979. The fourth and final launch of the SLV took place on 17 April 1983.
All four SLV launches occurred from the SLV Launch Pad at the Sriharikota High Altitude Range. The first two launches were experimental (E) and the next 2 were designated as developmental (D) as this was the first launch vehicle being developed by India not intended for a long service life.
|Flight №||Date / time (UTC)||Rocket,
|Launch site||Payload||Payload mass||Orbit||User||Launch
|E1||10 August 1979||Satellite Launch Vehicle||SLV Launch Pad||Rohini Technology Payload||35 kg||Low Earth||ISRO||Failure|
|Faulty valve caused vehicle to crash into the Bay of Bengal 317 seconds after launch.|
|E2||18 July 1980||Satellite Launch Vehicle||SLV Launch Pad||Rohini RS-1||35 kg||Low Earth||ISRO||Success |
|It was the first satellite successfully launched by the indigenous launch vehicle SLV. It provided data on the fourth stage of SLV.|
|D1||31 May 1981||Satellite Launch Vehicle||SLV Launch Pad||Rohini RS-D1||38 kg||Low Earth||ISRO||Partial failure|
|Orbit too low. Decayed after 9 days|
|D2||17 April 1983||Satellite Launch Vehicle||SLV Launch Pad||Rohini RS-D2||41.5 kg||Low Earth||ISRO||Success|
|Earth Observation satellite|
On May 23, 2016, A modified version of the launcher consisting only the first stage lofted the HEX-1 Reusable Launch Vehicle Technology Demostrator on a 10-minute mission to 70 kilometers in altitude.
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