{
  "type": "article",
  "title": "ISRO Launches EOS-05 via GSLV-F17: Key Differences Between PSLV and GSLV Rockets Explained",
  "summary": "The Indian Space Research Organisation has successfully launched the EOS-05 earth observation satellite using the GSLV-F17 vehicle, bringing the core differences between PSLV and GSLV rocket systems into focus.",
  "content": "The Indian Space Research Organisation (ISRO) has successfully launched the EOS-05 earth observation satellite using the GSLV-F17 vehicle. The satellite was successfully placed into its designated sub-geosynchronous transfer orbit following a lift-off from the Satish Dhawan Space Centre at 2:55 AM. This marks India's first imaging satellite of its kind. Expressing his delight over the milestone, ISRO Chairman Dr. V. Narayanan stated that the GSLV-F17 vehicle precisely and successfully delivered the advanced earth observation satellite EOS-05 into its required orbit.\n\nMission Highlights and Official Statements\nThomas Kurian, the mission director for the GSLV-F15 rocket mission, noted that the achievement is a moment of immense pride and joy for everyone involved. He added that the successful flight marks the 19th completed mission for GSLV, carrying EOS-05, a specially crafted earth observation satellite capable of near real-time imaging. It is the heaviest satellite ever launched by GSLV into a GTO or sub-GTO orbit.\n\nThe mission includes the EOS-5 satellite, designed to provide India with a continuous bird's-eye view from an altitude of roughly 36,000 kilometers above the Earth. It is capable of continuous monitoring and frequent imaging over vast regions. This capability strengthens India's proficiency in precise weather monitoring, early detection of natural disasters, surveillance of agriculture and environment, and safeguarding borders and strategic zones. Standing 51.7 meters tall with a lift-off mass of 420.5 tons, the GSLV-F17 launch vehicle ranks among India's largest operational launch vehicles.\n\nUnderstanding Launch Vehicles and Rockets\nLaunch vehicles are essentially rockets, serving as the machinery that transports satellites, probes, and even humans into space. ISRO primarily relies on two rocket categories: the Polar Satellite Launch Vehicle (PSLV) and the Geosynchronous Satellite Launch Vehicle (GSLV). While both function as rockets, the PSLV is designed to carry small to medium-sized satellites, whereas the GSLV packs more power to handle heavier payloads.\n\nWhat is the Polar Satellite Launch Vehicle (PSLV)?\nEngineered by ISRO, the PSLV is frequently described as the workhorse of the space agency. Its primary purpose is launching satellites into polar orbits, paths that pass directly over the Earth's poles. This trajectory benefits satellites requiring full-earth scanning capabilities, such as meteorological or reconnaissance spacecraft.\n\nThe PSLV boasts a high success rate, cementing its reputation as a dependable choice for international payloads. It operates as a four-stage rocket, with each stage housing its own engine to drive velocity and altitude. Solid fuel powers the first and third stages, while liquid fuel drives the second and fourth stages for enhanced control. It remains an economical and efficient option for smaller payloads.\n\nExploring the Geosynchronous Satellite Launch Vehicle (GSLV)\nAlso developed by ISRO, the GSLV surpasses the PSLV in raw power and is deployed for launching heavier satellites into geosynchronous transfer orbits (GTO). This positions satellites into orbits where they remain stationary relative to the Earth's equator, making the system ideal for communication and television broadcasting.\n\nGSLV features superior payload capacity and operates as a three-stage rocket. The initial two stages utilize solid and liquid propellants, while the third and most potent stage incorporates cryogenic fuel. This cryogenic engine relies on ultra-cold liquid hydrogen and liquid oxygen, generating sustained and massive thrust required for high-altitude orbital deployment.\n\nWhat this means for you\nThis successful space mission will directly enhance the nation's disaster management, weather forecasting, and strategic surveillance capabilities.\n\n• Across India: Precision in weather forecasting and early warning systems for natural disasters will improve nationwide, benefiting agriculture and security.\n• Enhanced Surveillance: Near real-time imaging will accelerate monitoring across national borders and strategic zones.\n• Space Industry: Indigenous launching of heavy satellites will boost national space technology and cost efficiency.\n• Technical Capacity: Advanced cryogenic engines and heavy payload handling pave the way for future large-scale space missions.\n• Communication Upgrades: Improvements will reflect in space-based services and high-tier communication network qualities.\n\nQuestions & Answers\n\n1. Which rocket was used to launch the EOS-05 satellite?\nThe EOS-05 satellite was successfully launched using the GSLV-F17 vehicle.\n\n2. From which space center was the mission launched?\nThe rocket lifted off from the Satish Dhawan Space Centre at 2:55 AM.\n\n3. What is the primary difference between PSLV and GSLV?\nPSLV handles small to medium payloads, whereas GSLV is more powerful and deploys heavy satellites into higher orbits.\n\n4. What is the height and lift-off mass of the GSLV-F17 vehicle?\nThe launch vehicle stands 51.7 meters tall with a lift-off mass of 420.5 tons.\n\n5. At what altitude has the EOS-05 satellite been placed?\nThe satellite has been positioned at an altitude of approximately 36,000 kilometers above the Earth.\n\n6. How many stages does the GSLV rocket have?\nGSLV is a three-stage rocket utilizing a cryogenic engine in its third stage.",
  "url": "https://trendkia.com/en/science/isro-launches-eos-05-via-gslv-f17-key-differences-between-pslv-and-gslv-rockets-explained-27437",
  "category": "Science",
  "publishedAt": "2026-09-04",
  "tags": [
    "ISRO",
    "GSLV",
    "PSLV",
    "EOS-05",
    "Space Research",
    "Satellite Launch"
  ],
  "language": "en",
  "site": "TrendKia"
}