ISRO’s latest Earth Observation Satellite EOS-08 will be launched onboard the third and final developmental flight of its Small Satellite Launch Vehicle (SSLV)-D3 at 9:17 am from Sriharikota on August 15.

It completes the SSLV Development Project and enables operational missions by Indian industry and NewSpace India Limited (NSIL).

Highlights of EOS-08 mission

• The primary objectives of the EOS-08 mission include designing and developing a microsatellite, creating payload instruments compatible with the microsatellite bus, and incorporating new technologies required for future operational satellites.

Built on the Microsat/IMS-1 bus, EOS-08 carries three payloads: 

i) Electro Optical Infrared Payload (EOIR)

ii) Global Navigation Satellite System-Reflectometry payload (GNSS-R)

iii) SiC UV Dosimeter.

• The spacecraft mission configuration is set to operate in a Circular Low Earth Orbit (LEO) at an altitude of 475 km.

• The spacecraft has a mission life of one year. It has a mass of  approximately 175.5 kg and generates power of around 420 W. The satellite interfaces with the SSLV-D3/IBL-358 launch vehicle.

• The EOIR payload is designed to capture images in the Mid-Wave IR (MIR) and Long-Wave IR (LWIR) bands, both during the day and night, for applications such as satellite-based surveillance, disaster monitoring, environmental monitoring, fire detection, volcanic activity observation, and industrial and power plant disaster monitoring.

• The GNSS-R payload demonstrates the capability of using GNSS-R-based remote sensing for applications such as ocean surface wind analysis, soil moisture assessment, cryosphere studies over the Himalayan region, flood detection, and inland waterbody detection. 

• The SiC UV Dosimeter monitors UV irradiance at the viewport of the Crew Module in the Gaganyaan Mission and serves as a high-dose alarm sensor for gamma radiation.

• EOS-08 marks a significant advancement in satellite mainframe systems such as an Integrated Avionics system, known as the Communication, Baseband, Storage, and Positioning (CBSP) Package, which combines multiple functions into a single, efficient unit.

• This system is designed with cold redundant systems using commercial off-the-shelf (COTS) components and evaluation boards, supporting up to 400 gb of data storage. 

• Additionally, the satellite includes a structural panel embedded with printed circuit board, an embedded battery, a Micro-DGA (Dual Gimbal Antenna), an M-PAA (Phased Array Antenna), and a flexible solar panel, each serving as key components for onboard technology demonstration.

• Incorporating additional novel schemes, the EOS-08 mission improves satellite technology through X-band data transmission, utilising pulse shaping and Frequency Compensated Modulation (FCM) for X-Band data transmitters.

• The mission also incorporates an auto-launch pad initialisation feature, further demonstrating its commitment to innovative mission management.

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