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Geosynchronous Satellite Launch Vehicle Mk I

GSLV Mk I was the first generation of India's Geosynchronous Satellite Launch Vehicle, distinguished by its Russian-supplied cryogenic upper stage. It flew six times from GSLV-D1 in 2001 through GSLV-F06 in 2010, completing four successful missions and suffering two launch failures.

Geosynchronous Satellite Launch Vehicle Mk I
Indian Space Research Organisation (ISRO) · Stored/public JPEG is 1520x2280 pixels with SHA-256 5a91801a1f549f0a71cdfb43bab2e6f111e67b59981a055d811ce094217aa0f5. The current official ISRO GSAT-29 mission gallery serves a 672x1008 rendition of the same GSLV Mk III-D2 liftoff; comparison with the stored asset after resize produced MAE 2.13, RMSE 3.73, and Pearson correlation 0.99827. The reviewed Wikimedia Commons record for these exact stored bytes identifies the 14 November 2018 GSLV Mk III D2 / GSAT-29 liftoff, author Indian Space Research Organisation, and the Government Open Data License-India, which permits reuse with provider/source/license attribution and no suggestion of endorsement while excluding official names, crests, logos, symbols, and other separately protected rights: https://commons.wikimedia.org/wiki/File:01_Launch_of_GSLV_Mk_III_D2_with_GSAT-29_from_Second_Launch_Pad_of_Satish_Dhawan_Space_Centre,_Sriharikota_(SDSC_SHAR).jpg. The current ISRO Copyright Policy separately permits accurate reproduction of material featured on its site with prominent source acknowledgment and excludes material identified as third-party. This is an asset-level reuse basis, not a public-domain claim or permission to use ISRO marks as endorsement. · Source
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Identity

Aliases
GSLV Mk IGSLV Mark IGSLV MK-IRussian-cryogenic GSLV
Family Name
GSLV
Full Name
Geosynchronous Satellite Launch Vehicle Mk I
Status
retired
Type
rocket
Variant Name
Mk I

Details

Description
GSLV Mk I was the first generation of India's Geosynchronous Satellite Launch Vehicle, distinguished by its Russian-supplied cryogenic upper stage. It flew six times from GSLV-D1 in 2001 through GSLV-F06 in 2010, completing four successful missions and suffering two launch failures.
Dimensions
Height
…
First Flight Year
2,001
Last Flight Year
2,010
Manufacturer
Operator
Parent Vehicle Family
Propulsion Configurations
  • Entries
    • Count
      1
      Placement
      core
      Propulsion System
      Role
      main
      Stage
      first-stage
      Variant Notes
      GSLV-D1 GS1 uses one S125 solid propellant motor as the core first stage.
    • Count
      4
      Placement
      booster
      Propulsion System
      Role
      booster
      Stage
      first-stage
      Variant Notes
      GSLV-D1 identifies four L40 liquid-propellant strap-on stages; the canonical L40 integrated-stage row is repeated by count four.
    • Count
      1
      Placement
      core
      Propulsion System
      Role
      main
      Stage
      second-stage
      Variant Notes
      GSLV-D1 identifies a single L37.5 liquid engine powering the GS2 second stage.
    • Count
      1
      Placement
      upper
      Propulsion System
      Role
      upper-stage
      Stage
      third-stage
      Variant Notes
      GSLV-D1's C12 cryogenic third stage is represented by the canonical Russian-supplied 12KRB integrated upper-stage row.
    Name
    GSLV Mk I Russian cryogenic configuration
    Notes
    ISRO's GSLV-D1 reference identifies the original Mk I topology: one S125 solid core motor plus four L40 liquid strap-on stages in GS1, one L37.5 liquid engine in GS2, and the Russian-supplied C12/12KRB cryogenic stage in GS3. This replaces the prior unnamed family-level migration baseline without adding a duplicate configuration.
Rocket Specs
Liftoff Mass
…
Payload Capacity
GTO
…
Reusability
expendable
Stages Count
3
Strap On Boosters Count
4

Links

Official Url
https://www.isro.gov.in/mission_GSLV_D2.html

Assets & Meta

Creation Time
July 14, 2026 at 07:26:47 UTC
Updated Time
August 15, 2026 at 06:02:35 UTC
Image
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