Engineering:List of SSLV launches

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Short description: Launches made by India's Small Satellite Launch Vehicle family of rockets

This article lists all the previous and planned launches by ISRO using Small Satellite Launch Vehicle (SSLV).

SSLV flight D2 during rollout.

Launch statistics

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Decade-wise summary of SSLV launches
Decade Successful Partial success Failure Total
2020s 2 0 1 3


Launch history

2022–2029

Date/Time
(UTC)
 Payload Launch site Regime Status
Flight Number Operator Function
Remarks
7 August 2022
03:48 		India EOS 02Template:Line breakIndia AzaadiSAT[1]
143 kg (315 lb) 		Satish Dhawan FLP LEO (intended)Template:Line breakTAO (achieved) Failure
SSLV-D1 ISRO Earth observation
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.
10 February 2023
03:48[6][7][8] 		India EOS-07Template:Line breakUnited States Janus-1Template:Line breakIndia AzaadiSAT-2
156.3 kg (345 lb)Template:Line break11.5 kg (25 lb)Template:Line break7.3 kg (16 lb) 		Satish Dhawan FLP LEO Success
SSLV-D2 ISRO Earth observation
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]
16 August 2024
03:47[15][16] 		India EOS-08Template:Line breakIndia SR-0 DEMOSAT
175.5 kg (387 lb)Template:Line break0.2 kg (0.44 lb) 		Satish Dhawan FLP LEO Success
SSLV-D3 ISRO Earth observation
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
By Q1 2026[22] SSLV SHAR India TBD
India PARIKSHIT 		ISRO
Flight L1. First serial flight of the SSLV.[16]
NET 2026[23] SSLV SHAR India TBD
India Azista60° 		ISRO
Flight L2.[16]
2026[24] SSLV SHAR Australia Optimus LEO Space Machines Company
Space MAITRI (Mission for Australia-India's Technology, Research and Innovation). First dedicated commercial SSLV launch. Payload weight 450 kg.[25]
TBD[26] SSLV SHAR United States 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.[27][28]

See also

References

  1. ↑ "AzaadiSAT – Space Kidz India" (in en-US). https://www.spacekidzindia.in/azaadisat/. 
  2. ↑ "SSLV-D1/EOS-2 Mission Brochure". https://www.isro.gov.in/sites/default/files/sslvd1-eos2_-_mission_brochure.pdf. 
  3. ↑ Madhumathi, D.S. (2019-08-07). "ISRO's mini launcher SSLV is unborn but has 2 flights booked". The Hindu. ISSN 0971-751X. https://www.thehindu.com/news/national/isros-mini-launcher-sslv-is-unborn-but-has-2-flights-booked/article28859854.ece. 
  4. ↑ "Department of Space, Annual Report 2020-2021". ISRO. p. 23. https://www.isro.gov.in/sites/default/files/anual_report_2020-2021_english.pdf. "EOS-02: EOS-02 is configured around MicroSat-TD bus platform to demonstrate launch on demand capability with SSLV. It is expected to meet the ever-increasing user demands for cartographic applications, urban and rural management, coastal land use and regulation, utilities mapping, development and various other GIS application. The mission life of the satellite is 9 months." 
  5. ↑ Subramanian, T. s (2022-08-11). "ISRO chief S. Somanath interview | 'An anomaly for two seconds led to SSLV mission's underperformance'" (in en-IN). The Hindu. ISSN 0971-751X. https://www.thehindu.com/opinion/interview/an-anomaly-for-two-seconds-in-one-of-accelerometers-in-launch-vehicle-led-to-sslv-missions-underperformance-isro-chief/article65758052.ece. 
  6. ↑ Kumar, Chethan (26 January 2023). "SSLV 2nd mission to carry US Sat, EOS-7; OneWeb Sats set to arrive Friday". Times of India. https://timesofindia.indiatimes.com/home/science/sslv-2nd-mission-to-carry-us-sat-eos-7-oneweb-sats-set-to-arrive-friday/articleshow/97357960.cms. 
  7. ↑ "ISRO planning to launch second development SSLV flight in Feb: S Somanath" (in en). 2023-01-04. https://www.livemint.com/science/news/isro-planning-to-launch-second-development-sslv-flight-in-feb-s-somanath-11672838016053.html. 
  8. ↑ "Sslv Hardware Ready, Launch Likely In '23 | Bengaluru News - Times of India" (in en). Dec 5, 2022. https://timesofindia.indiatimes.com/city/bengaluru/sslv-hardware-ready-launch-likely-in-23/articleshow/95989800.cms. 
  9. ↑ Rajwi, Tiki (12 October 2022). "Second development flight of Small Satellite Launch Vehicle likely this year" (in en-IN). The Hindu. ISSN 0971-751X. https://www.thehindu.com/news/national/kerala/second-development-flight-of-small-satellite-launch-vehicle-likely-this-year/article66001388.ece. 
  10. ↑ "SSLV-D2/EOS-07 MISSION". https://www.isro.gov.in/mission_SSLV_D2.html. 
  11. ↑ "SSLV-D2/EOS-07 Mission: Second Developmental Flight of SSLV". https://www.isro.gov.in/mission_SSLV_D1_summary_D2.html. 
  12. ↑ "Isro’s SSLV-D2/EOS-07 mission successful; three satellites placed in orbits". The Times of India. 2023-02-10. ISSN 0971-8257. https://timesofindia.indiatimes.com/india/isros-sslv-d2/eos-07-mission-successful-three-satellites-placed-in-orbits/articleshow/97789719.cms. 
  13. ↑ Singh, Abhinav (10 February 2023). "Mission accomplished: ISRO’s SSLV-D2 launch explained" (in en). https://www.theweek.in/news/india/2023/02/10/mission-accomplished-isros-sslv-d2-launch-explained.html. 
  14. ↑ Dutt, Anonna (2023-02-10). "SSLV-D2 places three small satellites in orbit" (in en). https://indianexpress.com/article/technology/science/isro-sslv-d2-launch-sriharikota-satellite-8435779/. 
  15. ↑ "Loksabha Q&A". DEPARTMENT OF SPACE. 2023-04-05. https://pqals.nic.in/annex/1711/AU5386.pdf. 
  16. ↑ 16.0 16.1 16.2 "Integrated Launch Manifesto for 2023-24 (Q4) & 2024-25". NSIL. 2024-02-08. https://www.inspace.gov.in/sys_attachment.do?sys_id=19a5f4ec8798461082e163d70cbb3571. 
  17. ↑ "SSLV-D3/EOS-08 Mission". https://www.isro.gov.in/Mission_SSLV_D3.html. 
  18. ↑ "SSLV development complete, says Isro chairman Somanath after today’s launch" (in en). 2024-08-16. https://indianexpress.com/article/technology/science/isro-launches-final-sslv-carrying-earth-observation-satellite-9517051/. 
  19. ↑ C.S, Hemanth (2024-08-16). "ISRO successfully launches EOS-08 Earth Observation Satellite" (in en-IN). The Hindu. ISSN 0971-751X. https://www.thehindu.com/sci-tech/science/isro-earth-observation-satellite-sslv-d3-eos-08-launch-sriharikota-august-16-2024/article68531393.ece. 
  20. ↑ Dutt, Anonna (2024-08-16). "SSLV development complete, says Isro chairman Somanath after today’s launch" (in en). https://indianexpress.com/article/technology/science/isro-launches-final-sslv-carrying-earth-observation-satellite-9517051/. 
  21. ↑ "Isro's SSLV-D3 mission successful, EOS-08 and SR-0 Demosat satellites placed in orbit". The Times of India. 2024-08-16. ISSN 0971-8257. https://timesofindia.indiatimes.com/india/isros-sslv-d3-mission-successful-eos-08-and-sr-0-demosat-satellites-placed-in-orbit/articleshow/112556542.cms. 
  22. ↑ "ISRO reveals new schedule, 7 launches planned in next 5 months" (in en-US). 2025-11-04. https://www.news9live.com/science/isro-reveals-new-schedule-7-launches-planned-in-next-5-months-2901874. 
  23. ↑ "Unstarred Question No. 406: Space Programmes and Missions". Lok Sabha. Parliament of India. 24 July 2024. https://sansad.in/getFile/loksabhaquestions/annex/182/AU426_uRcumI.pdf?source=pqals. "Following are the space programmes & missions planned in the year 2024. [...] One SSLV mission, to launch a technology demonstration Satellite (EOS-08)." 
  24. ↑ "SSLV's first dedicated commercial launch to put Australia-built satellite into orbit in 2026". The Economic Times. 26 June 2024. https://economictimes.indiatimes.com/news/science/sslvs-first-dedicated-commercial-launch-to-put-australia-built-satellite-into-orbit-in-2026/articleshow/111290505.cms. 
  25. ↑ NSIL and SMC_SSLV (1).pdf
  26. ↑ "SSLV | BlackSky Global 5 & 6" (in en). https://nextspaceflight.com/launches/details/7099. 
  27. ↑ "Application for Earth Exploration Satellite Service by BlackSky Global, LLC". FCC. 25 July 2019. p. 6. https://fcc.report/IBFS/SAT-MOD-20190725-00067/1816346.pdf. "Global-5 through Global-8 are currently scheduled to be launched in November 2019 on a Small Satellite Launch Vehicle (SSLV) by the Indian Space Research Organization from its Satish Dhawan Space Center"  Public Domain This article incorporates text from this source, which is in the public domain.
  28. ↑ "BlackSky Global to launch four earth observation satellites on board ISRO SSLV-D2" (in en-US). 2021-02-25. https://www.thetechoutlook.com/news/science/blacksky-global-to-launch-four-earth-observation-satellites-on-board-isro-sslv-d2/. 



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