Admin Team
15 Apr

ISRO / India-Linked Space Missions

Mission / Year / StatusMain ObjectivePayload / Lander / Rover / InvolvementKey Notes (Pointwise, including what was new)
XPoSat  | 1 Jan 2024  | Launched / OperationalTo study X-ray polarisation, timing and spectroscopy of cosmic sources such as black holes and neutron stars.Payloads: POLIX, XSPECT  | Lander/Rover: Not applicable  | Involvement: ISRO; POLIX by Raman Research Institute, XSPECT by URSC• India’s first dedicated space-based X-ray polarimetry mission  
• New: combination of polarisation + timing + spectroscopy on one platform  
 • ~143 GB scientific data released  
 • Guest Observer Programme for Indian scientists  
 • Proposal-driven observatory model (like AstroSat)  
 • PSLV-C58 also carried POEM-3 experimental payloads
GSLV-F14 / INSAT-3DS  | 17 Feb 2024  | Launched / OperationalTo strengthen meteorological observation, weather forecasting, ocean and land monitoring, disaster warning, data relay, and search & rescue services.Payloads: 6-channel Imager, 19-channel Sounder, DRT, SAS&R  |   | Involvement: ISRO; mission funded by Ministry of Earth Sciences (MoES)• Successfully placed INSAT-3DS in intended GTO  • Supports IMD, NCMRWF, IITM, NIOT, INCOIS etc.  • New / important point: strengthened confidence in GSLV Mark-II ahead of future missions like NISAR  • GSLV described as moving from “naughty boy” to “disciplined boy”  • Indian industries significantly contributed
SSLV-D3 / EOS-08  | 16 Aug 2024  | Launched / OperationalTo develop and validate a microsatellite platform, test payload compatibility, and demonstrate technologies for future operational satellites.Payloads: EOIR, GNSS-R, SiC UV Dosimeter  |    Involvement: ISRO; commercial relevance for NSILThird and final developmental flight of SSLV  • New in this mission: completion of SSLV development phase  • Marked ISRO’s stronger entry into the small satellite launch market  • EOIR enabled day-night IR imaging  • GNSS-R useful for soil moisture, flood detection, cryosphere studies  • SiC UV Dosimeter linked with Gaganyaan crew module monitoring  • New tech used: CBSP integrated avionics, Micro-DGA, M-PAA, flexible solar panel, nano-star sensor, SSTCR charging, auto-launch pad initialization  • SR-0 Demosat also placed in orbit
NISAR  | 30 Jul 2025  | Launched / OperationalTo study land and ice deformation, ecosystems, wetlands, ice sheets, glaciers, soil moisture, and other Earth-system changes.Payloads: L-band SAR + S-band SAR  |  Involvement: ISRO + NASA/JPLFirst joint satellite mission of ISRO and NASA  • New in this mission: first satellite to use dual-frequency SAR from one platform  • Uses SweepSAR technology for high-resolution, wide-swath imaging  • Uses large 12 m unfurlable reflector antenna on 9 m boom  • Global revisit in 12 days  • Free and open data policy  • First public S-band image captured Godavari Delta  • Antenna deployment completed after launch  • Science phase announced after calibration  • Shows long-term India-US technical cooperation
Gaganyaan  | Uncrewed phase 2025–26; Crewed target 2027  | Not yet launched (human mission)To demonstrate India’s capability to send humans to Low Earth Orbit, keep them there for a short duration, and bring them back safely.Payload / Systems: Crew Module, escape system, parachute recovery system  |  Involvement: ISRO + Indian Air Force + DRDO + Indian Navy + Indian Coast GuardIndia’s first human spaceflight mission  • New in this mission: India entering human spaceflight capability  • Planned for 3-member crew for up to 3 days in LEO  • Vyommitra half-humanoid robot to fly in uncrewed mission  • IADT-01 validated parachute-based recovery system  • Test sequence includes TV-D2, G1 uncrewed mission, then further validation  • Human-rated launch vehicle referred to as HLMV-III / human-rated LVM3  • Major focus on crew safety, deceleration, splashdown recovery
Chandrayaan-4  | Target 2028  | Approved / Yet to launchTo land on the Moon, collect samples, and return them to Earth.Mission Elements: PM, DM, AM, TM, RM  | Lander: DM + AM combined stack for soft landing  | Involvement: ISROIndia’s lunar sample-return mission  • New in this mission: first Indian mission aimed at bringing Moon samples back to Earth  • Described as India’s most complex lunar mission yet  • Landing area identified near Mons Mouton in south polar region  • Candidate sites studied: MM-1, MM-3, MM-4, MM-5  • MM-4 chosen as most suitable potential site  • Site selected using OHRC multi-view data from Chandrayaan-2 orbiter  • Importance: safe landing + scientifically valuable sample collection + ascent from lunar surface  • Related geology study by IIT Kharagpur + PRL on titanium-rich basalts supports mission planning
Chandrayaan-5 / LUPEX  | Approved / Under planning / Post-Chandrayaan-4 phaseTo study lunar water and volatile materials in Permanently Shadowed Regions (PSRs) near the lunar south pole.Lander: ISRO-built lunar lander  | Rover: JAXA / MHI-made rover (~350 kg)  | Payloads: scientific instruments for in-situ volatile analysis  | Involvement: ISRO + JAXA, with contributions from ESA and NASA instrumentsFifth mission in Chandrayaan series  • New in this mission: major India-Japan lunar collaboration focused on in-situ polar volatile / water-ice study  • Rover much heavier than Pragyan: about 350 kg  • Surface operation expected around 100 days, possibly up to 1 year  • Mission to launch on JAXA H3-24L rocket  • Focus on direct measurement of quantity, quality and distribution of lunar water  • Important precursor for future sustainable lunar exploration and long-term human missions  • Linked with India’s goal of landing astronauts on Moon by 2040


What is new overall in these missions?

MissionWhat is especially new?Why important?Quick focus
XPoSatFirst Indian X-ray polarimetry missionEntry into advanced space astronomyPolarisation science
INSAT-3DSStronger operational confidence in GSLVBetter weather and disaster servicesMeteorology
EOS-08 / SSLV-D3Completion of SSLV developmentSmall-satellite launch capabilityLow-cost launch ecosystem
NISARFirst ISRO-NASA joint satellite; first dual-frequency SAR missionHigh-value Earth observation12-day global mapping
GaganyaanFirst Indian human spaceflight programmeHuman space capabilityCrew safety and recovery
Chandrayaan-4First Indian lunar sample return missionBig jump beyond soft landingSample collection + return
Chandrayaan-5 / LUPEXFirst major ISRO-JAXA lunar polar rover missionWater-ice and resource studyIn-situ polar exploration
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