Launch Vehicle

• Small Satellite Launch Vehicle (SSLV)-D3

Mission Objective

• Development of a microsatellite platform.
• Integration of advanced payload instruments.
• Implementation of new technologies for future operations.

Microsatellite Bus

• Microsat/IMS-1

Payloads

Electro-Optical Infrared Payload (EOIR): This payload captures images in the Mid-Wave Infrared (MIR) and Long-Wave Infrared (LWIR) bands.

It operates both day and night, providing crucial data for applications like:

Satellite-based surveillance

Disaster monitoring

Environmental monitoring

Fire detection

Volcanic activity observation

Industrial and power plant disaster monitoring

Global Navigation Satellite System-Reflectometry (GNSS-R): This instrument uses signals from navigation satellites to measure various Earth surface properties.

It is particularly useful for:

Sea surface height measurements

Soil moisture content

Ocean wind speed

Monitoring of ice cover and changes

Silicon Carbide (SiC) UV Dosimeter: This instrument measures the intensity of ultraviolet radiation.

It helps in understanding the UV radiation profile, which has implications for:

Climatic studies

Ozone layer monitoring

Biological impact assessments

Mission Life

• 1 year

Mid-Wave Infrared (MWIR)

Long-Wave Infrared (LWIR)

• Wavelength Range: 3µm to 5µm (3,000 to 5,000nm)
• Detection: Radiant heat detected by uncooled thermal imaging cameras
• Capabilities:
• Achieves the longest-range detection for thermal infrared surveillance
• Cooled via cryo-cooler for extreme range, high contrast, and minimal noise

• Wavelength Range: 8µm to 14µm (8,000 to 14,000nm)
• Detection: Radiant heat detected by uncooled thermal imaging cameras
• Advantages:
• More affordable than cooled MWIR thermal imaging due to simpler sensors and lower maintenance requirements.
• Enhanced image quality with large aperture Germanium lenses, leading to cleaner and sharper images.

PRACTICE QUESTION

Q. Which of the following statements regarding the Earth Observation Satellite-8 (EOS-8) is/are correct?

1. The EOS-8 is set to be launched by the Small Satellite Launch Vehicle (SSLV)-D3.
2. The primary objective of EOS-8 includes the development of a microsatellite platform and integration of advanced payload instruments.
3. The Electro-Optical Infrared Payload (EOIR) of EOS-8 operates only during nighttime for surveillance applications.
4. The mission life of EOS-8 is expected to last for two years.

Select the correct answer using the codes below:

A) 1 and 2 only

B) 2 and 3 only

C) 1, 2, and 4 only

D) 1, 2, and 3 only

Answer: (A)