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. Updated Sep 28, 2026; each entry shows the date it was last checked against its source; 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). Archived on Zenodo, DOI 10.5281/zenodo.22985970. 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.
Cite as: SpaceNexus. (2026). SpaceNexus Promise Ledger (Version 2026-09-28) [Data set]. https://doi.org/10.5281/zenodo.22985970. Licensed CC BY 4.0.
The whole Promise Ledger, with every organisation and person, and the topic trackers.
Week in Space Data, every Friday.