ITV

Tag: Master Control Facility

  • Insat 4A orbit raised further

    Insat 4A orbit raised further

    MUMBAI: The Indian Space Research Organisation’s (Isro) telecommunications satellite Insat 4A’s orbit has been raised further. In the second orbit raising manoeuvre conducted at 1.24 pm on 24 December 24, the Liquid Apogee Motor (LAM) on board Insat 4A was fired for 42 minutes by commanding the satellite from Master Control Facility (MCF), Hassan.

    With this LAM firing, Insat 4A perigee (closest point to the earth) has been raised to 31479 km. The apogee height remains at 36,008 km and the inclination of the orbit with respect to the equatorial plane has been reduced from 0.85 deg to the present 0.12 deg. Insat 4A now has an orbital period of 22 hours 13 minutes. The satellite will now be in the continuous radio visibility of MCF-Hassan.

    Insat 4A was launched by European Ariane-5 launch vehicle on 22 December, 2005 from Kourou, French Guyana. The launch vehicle had placed Insat 4A in an orbit with a perigee (closes point to the earth) of 622 km and apogee (farthest point to earth) of 36,152 km.

    The first orbit raising manoeuvre carried out from MCF, Hassan on 23 December had put the satellite in an intermediate orbit of 13733 km perigee and 36,008 km apogee.

    The satellite came within the radio visibility of MCF this morning at 07.19 am and all the necessary operations like earth acquisition and gyro calibration were carried out before the second orbit raising manoeuvre was started.

    The next orbit manoeuvre to place Insat 4A in near Geosynchronous Orbit is planned on 26 December, 2005. Deployment of the two solar panels and the two antennas will be carried out subsequently.

  • Insat 3C launches on Thursday; DD readies for live telecast

    Insat 3C launches on Thursday; DD readies for live telecast

    Insat 3C will finally be launched tomorrow by an Ariane 4 rocket from the European spaceport of Kourou in French Guiana. The long delayed event will be telecast live by Doordarshan (DD1) from 3.45 am. The launch is scheduled at 4.23 am IST.

    According to Indian space agency Isro, all the launch preparations for the indigenously built Insat 3C have been completed at the launch site. The 2,750 kg spacecraft reached Kourou on 4 December 2001 and has since undergone extensive electrical and mechanical tests. It has now been integrated with the Ariane 4 launch vehicle of Arianespace, the space agency that is partnering Isro in the venture.

    Isro’s Master Control Facility (MCF) at Hassan in Karnataka meanwhile has been fully prepared to take control of INSAT-3C as soon as it is launched into its geostationary tranfer orbit. 

    Arianespace officials meanwhile say that final countdown operations for its first mission of the year are now underway following the launch readiness review, which was conducted on Tuesday at the Spaceport. The review verified the “go” status of the Ariane 4 vehicle, its INSAT 3C satellite payload, the launch infrastructure at the Guiana Space Center, and the downrange tracking stations that will follow the mission’s trajectory. Flight 147 will use an Ariane 42L version of the Ariane 4 launcher family, which is equipped with two liquid strap-on boosters added to the first stage for additional thrust during liftoff and initial ascent. 

    INSAT 3C has been developed and assembled by Isro, and will be placed at an orbital position of 74 deg East (over the Indian Ocean). INSAT 3C will carry 24 C-band, six extended C-band and two S-band transponders and a Mobile Satellite Service Transponder operating in S-band up-link and C-band down link frequencies, Isro officials say. It will provide telecommunications and TV coverage over the Indian subcontinent via the transponders on board. 

    The spacecraft will be the eighth Indian satellite orbited by Ariane launchers. The relationship between Arianespace and Isro dates back to the Ariane launch in June 1981 when the first Indian satellite, Apple was launched.