Earth observation satellite Cartosat 1 Hamsat

Cartosat 1

Earth observation satellite Cartosat 1 Hamsat

Indian Space Research Organisation launched the earth observation satellite Cartosat 1 which was the state-of-the-art remote sensing satellite for the main purpose cartographic studies from the SLP (Second Launch Pad) of Satish Dhawan Space Centre, Sriharikota on 5th May, 2005.

The satellite was put into orbit by the launch vehicle PSLV C-6. Cartosat-1 is the name given for the satellite technically termed as IRS P5. The mass of the satellite at the time lift-off was 1560 kilograms. The spacecraft was the first in the Cartosat series and designed for a mission life of five years. The satellite was introduced into a circular polar sun synchronous orbit with perigee of 616 kilometers and apogee of 621 kilometers and an inclination of 97.86 degrees.

Cartosat 1

Cartosat 1 is equipped with two panchromatic cameras with a 2.5 spatial resolution which are designed to capture images of the same area simultaneously, with the forward one looking at +26 degrees and the other at the posterior of the satellite at -5 degrees for generating approximately instantaneous data. The time difference between capturing the same region by the two cameras is about 52 seconds. The cameras are fixed on the satellite in a specific way that enables both the cameras to capture images of the same location in different angles.

Cartosat 1

The other payload, HAMSAT, weighed 42.5 kilograms at the time of launch was mainly aimed at providing amateur radio satellite communication services for Indian as well as international amateur radio operators. HAMSAT too was placed in a polar sun synchronous orbit as is the case with communication satellites.

The payload was officially put to desuetude after nine years and two months due to the failure of lithium ion batteries on board. HAMSAT VO-52 was designed for an operational tenure of one year but it outlasted far beyond the expectation by staying active for about ten years.

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