CleanupBot II at 01:25, 14 August 2023

2023-08-14T01:25:27Z

New page

{{Infobox spaceflight
| name = INSAT 4A
| image = Render of INSAT-4A spacecraft in deployed configuration.jpg
| image_caption = INSAT-4A spacecraft in deployed configuration

| mission_type = [[Communications satellite|Communications]]
| operator = [[INSAT]]
| website = [http://www.isro.gov.in/Spacecraft/insat-4a INSAT 4A]
| COSPAR_ID = 2005-049A
| SATCAT = 28911
| mission_duration = Planned: 12 years Achieved: {{time interval|22 December 2005|21 October 2019|show=ymd|sep=,}}

| spacecraft_bus = [[I-3K]]
| manufacturer = [[Indian Space Research Organisation|ISRO]]
| dry_mass = {{convert|1386|kg|lb}}<ref name="URSC_INSAT-4A">{{cite web |title=Salient features of INSAT-4A |url=https://www.ursc.gov.in/communication/html/insat-4a.jsp |access-date=28 October 2019}}</ref>
| launch_mass = {{convert|3081|kg|lb}}
| power = 5,922 watts
| dimensions = 2.8 x 1.7 x 2.0 m

| launch_date = {{start-date|22 December 2005, 22:33|timezone=yes}} UTC
| launch_rocket = [[Ariane 5|Ariane 5GS]]
| launch_site = [[Guiana Space Centre|Kourou]] [[ELA-3]]
| launch_contractor = [[Arianespace]]
| entered_service =

| disposal_type = Moved to a graveyard orbit
| deactivated = {{end-date|21 October 2019}}<ref name="eol-4a">{{cite web |title=Historical satellite position data for INSAT-4A for the month of October 2019 |url=https://www.satellite-calculations.com/Satellite/getpositionhistory.php?28911?archive/2019/October/2019_October_ |access-date=28 October 2019}}</ref>

| orbit_epoch =
| orbit_reference = [[Geocentric orbit|Geocentric]]
| orbit_regime = [[Geostationary orbit|Geostationary]]
| orbit_periapsis =
| orbit_apoapsis =
| orbit_inclination =
| orbit_period = 24 hours
| orbit_longitude =
| orbit_slot = 83° East ({{coord|0|+83|display=inline,title}})
| apsis = gee

| trans_band = 12 Ku band 12 C-band
| trans_frequency =
| trans_bandwidth = 36 megahertz
| trans_capacity =
| trans_coverage =
| trans_TWTA = 140 & 63 watts
| trans_EIRP = 51 & 38 dbW
| trans_HPBW =
}}
'''INSAT-4A''' was the first one in the [[INSAT]]-4 Satellites series, providing services in the [[Ku band|Ku]] and [[C band (IEEE)|C band]] frequency bands. At the time of launch, it was the heaviest satellite [[India]] had produced. The Ku transponders cover the Indian main land and C-Band transponders cover an extended area. It has a dozen Ku 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).<ref>http://space.skyrocket.de/doc_sdat/insat-4a.htm</ref><ref>http://www.isro.gov.in/Spacecraft/insat-4a</ref><ref>{{Cite web|url=https://www.ursc.gov.in/communication/html/insat-4a.jsp|title=SALIENT FEATURES OF INSAT-4A|website=www.ursc.gov.in|access-date=2020-01-16}}</ref>

== Overview ==
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.

== Launch ==
INSAT-4A was launched by an [[Ariane 5]], produced by [[Arianespace]], on 22 Dec 2005 at 4.22 am IST from [[Kourou]], [[French Guiana]]. It was placed into a Geosynchronous Transfer Orbit (GTO), 30 minutes after lift-off in 3-axis stabilized mode, with a [[perigee]] of 859 km and an [[apogee]] of 36,055 km. Its co-passenger on board was [[Meteosat-9]] of [[EUMETSAT]].

== Payload ==
*12 Ku band transponders. It was being used by [[Tata Sky]].
*12 C-band transponders

==End Of Life and Replacement==
The satellite was placed in the graveyard orbit on 21 October 2019 after almost 14 years in service.<ref name="eol-4a"/> A replacement satellite [[GSAT-30]] was launched on 21:05 UTC, 16 January 2020 aboard [[Ariane 5]] VA251.<ref>{{Cite web|url=https://www.isro.gov.in/update/17-jan-2020/press-release-india%E2%80%99s-communication-satellite-gsat-30-launched-successfully|title=Press Release: India’s communication satellite GSAT-30 launched successfully - ISRO|website=www.isro.gov.in|access-date=2020-01-16}}</ref><ref>{{Cite web|url=https://www.arianespace.com/press-release/flight-va251-first-arianespace-mission-of-2020-a-success-eutelsat-konnect-and-gsat-30-in-orbit/|title=Flight VA251 – first Arianespace mission of 2020 a success: EUTELSAT KONNECT and GSAT-30 in orbit|website=Arianespace|language=en-US|access-date=2020-01-16}}</ref>

== References ==
{{Reflist}}

{{Commons category}}{{INSAT Satellites}}
{{Indian spacecraft}}
{{Orbital launches in 2005}}

[[Category:Spacecraft launched in 2005]]
[[Category:Communications satellites in geostationary orbit]]
[[Category:INSAT satellites]]
[[Category:2005 in India]]

INSAT-4A - Revision history

CleanupBot II at 01:25, 14 August 2023