India Launches the Earth Observation Satellite EOS-08

'EOS-08,' the newest Earth observation satellite from ISRO, was launched today from Satish Dhawan Space Centre, Shriharikota, using the Small Satellite Launch Vehicle (SSLV)-D3.

Incorporating new technology needed for future operational satellites, designing and manufacturing a microsatellite, and creating payload instruments compatible with the microsatellite bus are the principal objectives of the EOS-08 mission.

The Satellite’s Advanced Capabilities Will Enhance the Monitoring System

Electro-Optical Infrared Payload (EOIR), Global Navigation Satellite System-Reflectometry (GNSS-R), and SiC UV Dosimeter are the three payloads that EOS-08, which is built on the Microsat/IMS-1 bus, carries.

Applications such as satellite-based surveillance, environmental monitoring, disaster monitoring, fire detection, volcanic activity observation, and industrial and power plant disaster monitoring are all possible with the EOIR payload's ability to capture images in the Mid-Wave IR (MIR) and Long-Wave IR (LWIR) bands, day and night.

Applying GNSS-R-based remote sensing for applications including analysing ocean surface winds, assessing soil moisture, studying the cryosphere over the Himalayan region, and detecting floods, and inland waterbodies is made possible by the GNSS-R payload.

At the same time, the SiC UV Dosimeter acts as a high-dose alert sensor for gamma radiation and tracks UV irradiance through the viewport of the Crew Module during the Gaganyaan Mission.

During its one-year mission, the spacecraft will remain in a Circular Low Earth Orbit (LEO) at 475 km in height and 37.4° in inclination. The satellite can produce about 420 W of power and weighs about 175.5 kg. It is capable of communicating with the SSLV-D3 launch vehicle.

Integrated Avionics System

An Integrated Avionics system called the Communication, Baseband, Storage, and Positioning (CBSP) Package integrates various tasks into one efficient unit; EOS-08 is a major improvement in satellite mainframe systems like this.

Designed with cold redundant systems in mind, this system supports up to 400 GB of data storage and uses evaluation boards and commercial off-the-shelf (COTS) components.

To round out the onboard technological demonstration, the satellite contains a structural panel with PCBs incorporated in it, a battery that is embedded in the panel, a Micro-DGA (Dual Gimbal Antenna), an M-PAA (Phased Array Antenna), and a flexible solar panel.

The smaller design of the satellite's antenna pointing mechanisms allows it to rotate at a pace of 6 degrees per second and keep a pointing precision of ±1 degree.

The miniature phased array antenna further enhances the communication capabilities, and the structural integrity and power generation are both improved by the flexible solar panel, which uses a foldable solar panel substrate, GFRP tube, and CFRP honeycomb rigid end panel.

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