PSLV-D1

PSLV-D1

Model of the PSLV rocket
Mission type	Deployment of one satellite.
Operator	ISRO
Website	ISRO website
Mission duration	12 minutes
Spacecraft properties
Spacecraft	Polar Satellite Launch Vehicle
Spacecraft type	Launch vehicle
Manufacturer	ISRO
Launch mass	295,000 kilograms (650,000 lb)
Payload mass	846 kilograms (1,865 lb)[1]
Start of mission
Launch date	05:12:00, September 20, 1993 (1993-09-20T05:12:00) (IST)
Rocket	PSLV
Launch site	Satish Dhawan Space Centre
Contractor	ISRO
End of mission
Disposal	Failed
Deactivated	20 September 1993
Payload
IRS-1E (could not be placed in orbit).
Polar Satellite Launch Vehicle missions PSLV-D2 →

PSLV-D1 was the first mission of the PSLV program.^[1] The rocket carried IRS-1E satellite but could not deploy it as the mission failed due to a software error in on board guidance and control processor. PSLV-D1 was launched at 5:12 a.m. IST on 20 September 1993. This mission was the only full failed mission under the PSLV program until the launch of PSLV-C39.^[2][3][4][5]

PSLV-D1 was launched at 5:12 a.m. IST on 20 September 1993 from Satish Dhawan Space Centre (then called "Sriharikota Launching Range"). A large disturbance occurred at the point of second stage separation and one of the retro rockets of the second stage failed due to software error in on board guidance and control processor. About 12 minutes after launch, the vehicle fell back to earth and crashed in the Bay of Bengal. The satellite IRS-1E could not be placed in orbit and the mission was a total failure.^[2][5]

• Indian Space Research Organisation
• Polar Satellite Launch Vehicle