GSAT-6A was a communication satellite launched by the Indian Space Research Organisation (ISRO). It featured a 6-metre (20 ft) unfurlable S-band antenna similar to the one used on GSAT-6 . Around 17 minutes after lift-off, the three stage GSLV Mk.II rocket flying on GSLV F08 mission successfully injected the satellite into a geosynchronous transfer orbit. Due to power failure during its orbit raising burns the communication was lost with GSAT-6A before it could reach its final circular geostationary orbit (GSO).
13-855: GSAT-6A was launched to complement GSAT-6 satellite which was launched in August 2015 by ISRO. The cost of building GSAT-6A was around ₹270 crore . GSAT-6A was to provide mobile communication services to the Indian Armed Forces . GSLV-F08 carrying GSAT-6A spacecraft was launched from Second Launch Pad of Satish Dhawan Space Centre on 29 March 2018, 11:26 UTC and after flight of 17 minutes 45 seconds, placed GSAT-6A into its planned geostationary transfer orbit with 36,692.5 kilometres (22,799.7 mi) apogee, 169.4 kilometres (105.3 mi) perigee and orbital inclination of 20.64°. GSAT-6A spacecraft deployed its solar array after separation from CUS and established contact with ground station. On GSLV-F08,
26-436: A High Thrust Vikas engine (HTVE) was inducted on second stage (GS2) of GSLV with 6% higher thrust than before. The improved engine increased the payload capability of the vehicle. The electrohydraulic actuation system on second stage was also replaced with simpler and robust electromechanical system. The Cryogenic Upper Stage of GSLV F08 performed a burn to depletion for the first time. Officials said any improvement done to
39-568: A dozen K u transponders and another dozen of C-band transponders. This spacecraft was placed at 83°E along with INSAT-2E and INSAT-3B, by Ariane launch vehicle (ARIANE5-V169). INSAT-4A was a communication satellite intended for providing high quality television, telecommunication, broadcasting services and was the first satellite to be launched in the INSAT-4 series. INSAT-4A was launched by an Ariane 5 , produced by Arianespace , on 21 Dec 2005 at 22.33 UTC from Kourou , French Guiana . It
52-493: A multimedia communication satellite that will offer a Satellite Digital Multimedia Broadcasting (S-DMB) service across several digital multimedia terminals or consoles which can be used to provide information services to vehicles on the fly and to the mobile phones. The satellite can be used for other social and strategic applications. INSAT-4E has five C x S transponders each of 9 MHz bandwidth and five S x C transponders each of 2.7 MHz bandwidth which will together cover
65-453: The GSAT-6 satellite has remained largely underutilized since its launch in August 2015 which is almost half of the expected operational life of 12 years. The audit observed the lack of coordination between Department of Space and DRDO and the delay in establishing ground segment by DRDO as the reason behind this disuse. According to Department of Space the 20 per cent of the GSAT-6 capacity
78-416: The GSAT-6 satellite. The GSAT-6 satellite's Liquid Apogee Motor (LAM) was fired for 3385 seconds at 08:35 hours IST on August 28 during the first orbit raising operation and modified the satellite orbit to 8,408 km (perigee height) by 35,708 km (apogee height) with an inclination of 7.5 degree and an orbital period of 13 hours, 15 minutes and 24 seconds. Second orbit raising operation of GSAT-6
91-419: The entire country. GSAT-6 uses a 0.8 meter (fixed) and one 6 meter S-Band unfurlable antenna (transmit and receive). The unfurlable antenna weighing 18 kg has CFRP truss construction with aluminium alloy joints and its parabolic gold plated molybdenum mesh is supported and shaped by cable mesh structures. The cost of GSAT-6 satellite is ₹232 crore and it is identical in configuration to GSAT-6A which
104-511: The unfurlable antenna (UFA) also successfully completed with this. The satellite was at 78 degrees east longitude and was drifting towards its final slot at 83 degrees east. GSAT-6 was successfully positioned in its orbital slot of 83 degree east and collocated with INSAT-4A , GSAT-12 , GSAT-10 and IRNSS-1C on September 6, 2015, morning, after carrying out four drift arresting maneuvers. According to Comptroller and Auditor General of India report submitted to parliament in 20 December 2022,
117-498: The vehicle would be incorporated into GSLV's future missions. The first orbit raising maneuver for GSAT-6A was carried out as planned on 30 March 2018 by firing the Liquid Apogee Motor (LAM) for 2188 seconds from 09:22 AM IST. The second orbit raising maneuver was carried out at 10:00 AM on 31 March 2018. As the satellite was on-course for its third and final orbit raising maneuver on 1 April 2018, communication with it
130-587: Was launched later. ISRO successfully launched INSAT-4E on 27 August 2015, using a GSLV D6 Mk.II rocket flying from the Satish Dhawan Space Centre and inserted into a Geostationary Transfer Orbit (GTO) with injection parameters of 170 km x 35945 km, 19.96 degree inclination. The cost of launch vehicle was around ₹276 crore. Maneuvers to move the satellite into its designated geosynchronous orbit at 83 degrees East longitude were initiated on 28 August 2015 by firing motors on board
143-452: Was lost and the spacecraft was temporarily untraceable. After regaining its track, efforts to re-establish communication with the satellite could not succeed. Power system malfunction was suspected to be the reason behind loss of contact. ISRO will launch GSAT-32 satellite as replacement for GSAT-6A. GSAT-6 INSAT-4E , also known as GSAT-6 , is a member of the INSAT family and is
SECTION 10
#1732787325296156-507: Was successfully completed by firing the Apogee Motor for 2663 seconds at 11:10:53 hours IST on Aug 29, 2015. Realized orbit was 26,998 km (perigee height) by 35,682 km (apogee height) with an inclination of 0.115 degree and an orbital period of 20 hours and 15 minutes. Third orbit raising operation of GSAT-6 was successfully completed by firing the Apogee Motor for 580.32 seconds at 07:46 hours IST on Aug 30, 2015. Deployment of
169-572: Was used for its research projects and societal applications but was not aware of the status of utilization of the remaining capacity. INSAT-4A INSAT-4A was the first one in the INSAT -4 Satellites series, providing services in the K u and C band frequency bands. At the time of launch, it was the heaviest satellite India had produced. The K u transponders cover the Indian main land and C-Band transponders cover an extended area. It has
#295704