GSLV Mk II | IDRSS-1

Name: GSLV Mk II | IDRSS-1
Start: 2026-12-31T00:00:00Z
End: 2026-12-31T00:00:00Z
Location: Satish Dhawan Space Centre, India

TO BE DETERMINED

> T-MINUS (NET)

DAYS

HRS

MIN

SEC

Target time only (NET — no earlier than). This launch is not yet confirmed and may slip.

> MISSION DATA

DATEThursday, December 31, 2026

TIME12:00 AM UTC

PROVIDERIndian Space Research Organization

ROCKETGSLV Mk. II

PADSatish Dhawan Space Centre Second Launch Pad

LOCATIONSatish Dhawan Space Centre, India

ORBITGeostationary Transfer Orbit

> MISSION BRIEFING // COMMUNICATIONS

The Indian Data Relay Satellite System (IDRSS) is a planned system of 2 geostationary data relay satellites by the Indian Space Research Organization (ISRO) for data relaying to and from other Indian satellites and launch vehicles to the ground, including supporting future Indian Human Spaceflight missions with the Gaganyaan spacecraft.

> SCHEDULE & SOURCE

Source-reported status: To Be Determined. Current date is a placeholder or rough estimation based on unreliable or interpreted sources.

Launch window: 2026-12-31 00:00:00 UTC — 2026-12-31 00:00:00 UTC.

Dates and windows may change. Passing the scheduled time does not confirm a launch outcome.

Launch data from The Space Devs

Understand launch windows and orbits · Launch provider guide

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