INSAT-3D

INSAT - 3D is a weather satellite of India's ISRO from the Insat series.

He was placed in a geostationary orbit on July 25, 2013 at 19:41 UTC by an Ariane 5 rocket from the Guiana Space Centre rocket launch site (along with Alphasat I- XL). After launching the satellite into a transfer orbit of 248 x 35 947 and an inclination of about 3.5 degrees, the satellite began uncontrollably to turn immediately after the deployment of the solar boom of the satellite, and then the communication link to the satellite eventually broke off. With the help of reserve systems, the satellite could be brought back under control and has on 1 August 2013 following three combustion phases of his with monomethyl hydrazine (MMH ) as fuel and a mixture of oxides of nitrogen (MON -3) as oxidizer operated 440 N strong main drive, the planned altitude substantially achieved.

The three -axis stabilized satellite is equipped with a six -channel imaging system, an atmospheric instrument with 19 channels (18 infra and a channel in the visible range ) and a system of international search and rescue system COSPAS- SARSAT and to his position 82 ° East from meteorological data such as weather images and data on the distribution temperature, humidity and ozone supply the atmosphere. The orbit and attitude control is provided by Sun and star sensors, gyroscope, Momentum and Reaction Wheels, Magnetic torquers and engines. It is powered by solar cells with a power of 1164 watts and two 18 Ah Ni- Cd batteries with energy. It was built on the basis of the ISRO satellite bus i2k and has a design life of seven years.