List of SSLV launches

The Small Satellite launch vehicle is an expendable small-lift capacity launch vehicle designed and built by ISRO.

SSLV flight D2 during rollout.

Launch statistics

1

2

3

2022

2023

2024

•   Failure
•   Partial failure
•   Success
•   Planned

Decade-wise summary of SSLV launches

Decade	Successful	Partial success	Failure	Total
2020s	2	0	1	3

Launch history

Flight No.	Date and time (UTC)	Rocket, configuration	Launch site	Payload	Payload mass	Orbit	User	Launch outcome
D1	7 August 2022 03:48	SSLV	First	EOS 02 AzaadiSAT[1]	143 kg	LEO (intended) TAO (achieved)	ISRO	Failure
	The first developmental flight of SSLV. The mission target was a circular orbit of altitude 356.2 km with 37.2° inclination. The mission carried two satellite payloads. The 135 kg EOS 02, an Earth observation satellite and the 8 kg AzaadiSAT CubeSat.[2][3][4] Due to sensor failure coupled with shortcomings of onboard software, the stage as well as the two satellite payloads were injected into an unstable transatmospheric Earth orbit measuring 356×76 km and subsequently destroyed upon reentry. According to S. Somanath, an anomaly lasting 2 seconds in one of the accelerometers during second stage separation initiated salvage mode by onboard computer. Guidance, navigation, and control software switched from 'closed loop guidance' where it received real-time feedback from all sensors to an 'open loop guidance' where accelerometer data gets isolated and a predetermined path is followed.[5] This resulted in velocity shortfall from the required 7.3 km/s to 7.2 km/s. Being in salvage mode, Velocity-Trimming Module didn't rectify this shortfall which led to mission failure.
D2	10 February 2023 03:48 [6][7][8]	SSLV	First	EOS-07 Janus-1 AzaadiSAT-2	156.3 kg 11.5 kg 7.3 kg Total = 334 kg	LEO	ISRO	Success
	Second developmental flight of the SSLV.[9][10][11] The purpose of SSLV-D2 is to launch EOS-07, Janus-1 and AzaadiSAT-2 into a 450-kilometer circular orbit and showcase the in-flight performance of the SSLV vehicle systems.[12] According to SSLV-D1 fault evaluation study, six onboard accelerometers detected vibrations that were longer in duration and more intense during the second stage of separation. In order to ensure that this problem doesn't occur again, the second stage detachment system in SSLV-D2 was modified to reduce vibrations. Furthermore, the system was redesigned to navigate utilizing NavIC data and readings will now be monitored for a longer time before entering rescue mode.[13] The separation mechanism, the equipment bay, and the on-board system for identifying malfunctioning sensors were further modified and five new pieces of hardware were installed. The electronics in SSLV-D2 worked successfully, as did the launch vehicle's new, affordable guidance and navigation system.[14]
D3	16 August 2024 03:47 [15][16]	SSLV	First	EOS-08 SR-0 DEMOSAT	175.5 kg 0.2 kg Total = 175.7 kg	LEO	ISRO	Success
	Third developmental flight and completion of SSLV Development Project.[17][18] The development team will continue to search for specific operational activities in the VTM stage before ISRO supplies the industry with SSLV technology for serial production. Any necessary fine-tuning will be finished prior to the technology transfer.[19][20] Repeatable flight performance of the SSLV vehicle systems has also been demonstrated by SSLV-D3.[21]

Future launches

Date / time (UTC)	Rocket, Configuration	Launch site	Payload	Orbit	User
NET 2025[22]	SSLV	SHAR	TBD PARIKSHIT		ISRO
	Flight S1. First serial flight of the SSLV.[16]
NET 2026[22]	SSLV	SHAR	TBD Azista60°		ISRO
	Flight S2.[16]
2026[23]	SSLV	SHAR	Optimus	LEO	Space Machines Company
	Space MAITRI (Mission for Australia-India's Technology, Research and Innovation). First dedicated commercial SSLV launch.
TBD[24]	SSLV	SHAR	BlackSky Global-5, 6, and two others	LEO	Spaceflight Industries
	Manifested on a future SSLV commercial flight, four 56 kg Blacksky Global satellites to ~500 km circular orbit with 50° inclination.[25][26]

See also

• List of PSLV launches
• List of GSLV launches
• List of LVM3 launches