Which Indian satellite gathers data for oceanographic, coastal and atmospheric application?

Correct option is C

The Correct Answer is: (C) IRS-P4

Explanation:
IRS-P4, also known as Oceansat-1, is an Indian Earth observation satellite dedicated to oceanographic and atmospheric studies. It was launched by ISRO to provide critical data related to ocean color, phytoplankton concentration, and atmospheric aerosols, which are essential for marine and coastal resource management.

Information Booster:
• IRS-P4 was launched on May 26, 1999, using the PSLV-C2 launch vehicle.
• Oceansat-1 was India’s first dedicated satellite for oceanographic studies.
• It carried two main payloads: Ocean Colour Monitor (OCM) and Multi-frequency Scanning Microwave Radiometer (MSMR).
• The data supports fisheries, weather forecasting, and coastal zone management.
• It laid the foundation for the subsequent Oceansat series – Oceansat-2 and Oceansat-3.

Additional Information:
•  INSAT-4D – This was a planned satellite for communication services under the INSAT system, but it was never launched.
•  GSAT-4 – A communication and navigation satellite that failed to reach orbit after its launch in 2010. It was not designed for oceanographic applications.
•  INSAT-3B – A communication satellite launched in 2000, part of the INSAT series to support telecommunication and broadcasting services.