After Seven-Month Hiatus, ISRO to Launch Key Satellite on Sept 4, Pg9

Key Highlights:

• The Indian Space Research Organisation (ISRO) is set to launch the Earth Observation Satellite (EOS-05) on September 4, 2026.
• The launch will be conducted using the Geosynchronous Satellite Launch Vehicle (GSLV) F17 from Sriharikota.
• This mission marks ISRO's return to launches after a seven-month hiatus following a failed mission in January.
• EOS-05, also known as GISAT-1A, is a replacement for GISAT-1 (EOS-03), which failed to reach orbit in 2021.
• It is India's first imaging satellite designed to operate from a geosynchronous orbit, providing continuous observation of large areas.

Detailed Insights:

• The EOS-05 satellite is designed for continuous monitoring of large areas, crucial for applications like disaster management, agriculture, and forestry.
• Its placement in geosynchronous orbit allows it to appear stationary relative to a point on Earth, enabling constant observation of a specific region.
• The previous GISAT-1 mission in 2021 failed due to a malfunctioning valve in the cryogenic upper stage of the rocket.
• ISRO has experienced recent setbacks, including the PSLV-C62/EOS-N1 mission in January, which failed due to an anomaly in the third stage.
• The successful launch of EOS-05 is significant for ISRO to reinforce confidence in its launch program and advance its Earth observation capabilities.
• Earth observation satellites are vital for weather monitoring, agricultural assessment, disaster management, and security-related observation.

Scientific/Technical Concepts Involved:

• Earth Observation Satellite (EOS): Satellites designed to monitor Earth's physical, chemical, and biological systems from space for various applications.
• Geosynchronous Satellite Launch Vehicle (GSLV): An Indian launch vehicle primarily used to place satellites into geosynchronous transfer orbit.
• Geosynchronous Orbit: An orbit where a satellite appears stationary relative to a point on Earth's surface, typically at an altitude of about 35,786 km.
• Low Earth Orbit (LEO): An orbit relatively close to Earth's surface (160 km to 2,000 km altitude), used by many earth observation satellites for higher resolution.