Insat 3D

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Insat 3D
Type: Weather satellite
Country: IndiaIndia India
Operator: ISRO
COSPAR-ID : 2013-038B
Mission dates
Dimensions: 2,061 kg (1125 kg fuel)
Size: 2.4 m × 1.6 m × 1.5 m
Begin: July 25, 2013
Starting place: CSG ELA-3
Launcher: Ariane 5 VA-214
Status: active
Orbit data
Track height: 36,000 km

Insat 3D is a weather satellite from the Indian ISRO from the Insat series.

It was put into geostationary orbit on July 25, 2013 at 19:41 UTC with an Ariane-5 launcher from the Center Spatial Guyanais rocket launch site (together with Alphasat I-XL ) . After the satellite was deployed in a transfer orbit of 248 × 35,947 km and an orbit inclination of about 3.5 degrees, the satellite began to rotate uncontrollably immediately after the satellite's solar cell boom had unfolded, whereupon the communication link to the satellite finally broke off. With the help of reserve systems, the satellite could be brought under control again and on August 1, 2013, after three burning phases of its 440 N main propulsion operated with monomethylhydrazine (MMH) as fuel and a mixture of nitrogen oxides ( MON-3 ) as oxidizer, it reached the planned altitude essentially achieved.

The three-axis stabilized satellite is equipped with a six-channel imaging system, an atmosphere measuring device with 19 channels (18 infrared and one channel in the visible range) as well as a system of the international search and rescue system COSPAS-SARSAT and should be from its position 82 ° East from meteorological data such as weather images and data on the distribution of temperature, humidity and ozone content of the atmosphere. The path and position control is carried out via sun and star sensors , gyroscopes , reaction wheels , magnetic torquers and engines. It is supplied with energy by solar cells with an output of 1164 watts and two 18 Ah Ni-Cd accumulators . It was built on the basis of the I2K satellite bus from ISRO and has a planned service life of seven years.

Web links

Individual evidence

  1. a b ISRO: Insat-3d ( Memento of the original from August 5, 2013 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. (PDF; 688 kB) @1@ 2Template: Webachiv / IABot / www.isro.org
  2. Thomas Weyrauch: INSAT 3D reaches GSO after problems , August 3, 2013