Promise Ledger
Indian Space Research Organisation. These are the dated public commitments by ISRO and its people that we could source to a primary, with what happened.
3 entries: 2 met; 1 revised.
Plain counts, not a grade or a ranking. A short record is not a complete one. Checked against sources on Sep 26, 2026; scoring rules on the methodology page.
This first release is a selection, and a short record is not a complete record. Each programme milestone enters the ledger at its earliest dated public commitment we can find in a primary source, for governments and companies alike. Later dated commitments for the same milestone are shown on that one entry as a revision chain, oldest first, rather than as separate entries.
Revised · worded as a target
Landing · ISRO
“All the modules are getting ready for Chandrayaan-2 launch during the window of July 09, to July 16, 2019, with an expected Moon landing on September 06, 2019.”
Said . Source: ISRO: Press Release on Chandrayaan-2 (May 1, 2019, paragraph 2)
Context: ISRO press release on Chandrayaan-2 (Orbiter, Vikram lander, Pragyan rover). Earliest dated ISRO statement with a landing date that we found; earlier statements gave launch periods only.
Later dated commitments for the same milestone
The counts use the original commitment. The latest date in the chain stands as: missed.
Outcome: Vikram's descent on 2019-09-07 (IST) was as planned down to an altitude of 2.1 km, after which communication from the lander to the ground stations was lost.
Outcome source: ISRO: Chandrayaan 2 - Update (Sep 7, 2019)
Checked against the source on Sep 26, 2026. Report a correction or send a response to this entry
Met · worded as a target
Landing · ISRO
“The Lander Module is in 25 km x 134 km orbit. Powered descent is expected to commence on August 23, 2023, around 1745 Hrs. IST”
Said . Source: ISRO: Chandrayaan-3 mission page (update of August 20, 2023) (Aug 20, 2023, update dated August 20, 2023)
Context: Mission update on ISRO's Chandrayaan-3 page; the powered descent is the start of the soft-landing sequence.
Outcome: ISRO announced on 23 August 2023 that Chandrayaan-3 had soft-landed on the Moon; the rover ramped down the next day. (, on or before the deadline)
Outcome source: ISRO: Chandrayaan-3 mission page (update of August 23, 2023) (Aug 23, 2023)
Checked against the source on Sep 26, 2026. Report a correction or send a response to this entry
Met · worded as a commitment
Launch · ISRO
“NASA-ISRO Synthetic Aperture Radar (NISAR), the first joint satellite of ISRO and NASA will be launched by ISRO’s GSLV-F16 on July 30, 2025 at 1740 hrs IST”
Said . Source: ISRO: ISRO's GSLV-F16 will launch ISRO-NASA joint satellite, NISAR, on July 30, 2025 (Jul 21, 2025, paragraph 1)
Outcome: GSLV-F16 launched NISAR on 30 July 2025 and delivered it to orbit. (, on or before the deadline)
Outcome source: ISRO: One successful year of NISAR (Aug 17, 2026)
Checked against the source on Sep 26, 2026. Report a correction or send a response to this entry
Open data: download the whole ledger (CSV, CC BY 4.0). Cite as “SpaceNexus Promise Ledger” with a link. How entries are scored: methodology. No sponsor, advertiser or partner can add, remove, reorder, annotate or preview an entry, and these pages carry no advertising.
The whole Promise Ledger, with every organisation and person, and the topic trackers.
Week in Space Data, every Friday.