Ajay Kumar at 07:50, 2 September 2023

2023-09-02T07:50:31Z

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{{Infobox spaceflight
| name = INSAT-1B
| image = Insat-1B.jpg
| image_caption = INSAT-1B before launch

| mission_type = [[Communications satellite|Communications]]
| operator = [[INSAT]]
| COSPAR_ID = 1983-089B
| SATCAT = 14318
| mission_duration = 7 years

| spacecraft_type = [[INSAT]]-1
| manufacturer = [[Ford Aerospace]]
| launch_mass = {{convert|1152|kg|lb}}
| dry_mass =
| power =

| launch_date = 30 August 1983, 06:32:00 UTC<ref name="launchlog">{{cite web|url=http://planet4589.org/space/log/launchlog.txt|title=Launch Log|first=Jonathan|last=McDowell|work=Jonathan's Space Page|access-date=16 November 2013}}</ref>
| launch_rocket = {{OV|099}}<br/>[[STS-8]] / [[Payload Assist Module|PAM-D]]
| launch_site = [[Kennedy Space Center|Kennedy]] [[Kennedy Space Center Launch Complex 39|LC-39A]]
| launch_contractor = [[NASA]]
| deployment_date = {{start-date|31 August 1983, 07:48|timezone=yes}} UTC
| entered_service =

| disposal_type = Decommissioned
| deactivated = {{end-date|August 1993}}

| orbit_epoch = 14 November 2013, 15:52:38 UTC<ref name="n2yo">{{cite web|url=http://www.n2yo.com/satellite/?s=14318|title=INSAT 1B Satellite details 1983-089B NORAD 14318|work=N2YO|date=14 November 2013|access-date=16 November 2013}}</ref>
| orbit_reference = [[Geocentric orbit|Geocentric]]
| orbit_regime = [[Geostationary orbit|Geostationary]]
| orbit_periapsis = {{convert|35741|km|mi}}
| orbit_apoapsis = {{convert|35846|km|mi}}
| orbit_inclination = 14.69 degrees
| orbit_semimajor = {{convert|42164.88|km|mi}}
| orbit_eccentricity = 0.0012393
| orbit_period = 23.93 hours
| orbit_longitude = 74° east (1983-92)<br/>93° east (1992-93)
| apsis = gee
}}
'''INSAT-1B''' was an Indian [[communications satellite]] which formed part of the [[Indian National Satellite System]]. Launched in 1983, it was operated in [[geostationary orbit]] at a longitude of 74 degrees east.<ref name="GSP"/> At the end of its seven-year design life it was replaced by the newly launched [[INSAT]]-1D, dropping to backup status. In 1992, it was relocated to 93° east, before being decommissioned in August 1993.<ref name="GSP">{{cite web|url=http://space.skyrocket.de/doc_sdat/insat-1a.htm|title=Insat 1A, 1B, 1C, 1D|first=Gunter|last=Krebs|work=Gunter's Space Page|access-date=16 November 2013}}</ref>

Built by [[Ford Aerospace]] and operated by the [[Indian National Satellite System]],<ref name="GSP" /> INSAT-1B was based upon a custom [[satellite bus]] developed for the [[INSAT]]-1 series of satellites. It had a mass at launch of {{convert|1152|kg}}, and was expected to operate for seven years. The spacecraft carried twelve [[C band (IEEE)|C]] and three [[S band]] transponders, powered by a single [[solar array]].<ref name="GSP"/> A stabilisation boom was used to counterbalance radiation torques from the satellite's asymmetrical design.<ref name="SSF302">{{cite book|last=Harland|first=David M|author2=Lorenz, Ralph D.|title=Space Systems Failures|publisher=Springer-Praxis|location=Chichester|year=2005|edition=2006|isbn=0-387-21519-0|pages=302–3}}</ref> The spacecraft was propelled by an [[R-4D|R-4D-11]] [[apogee motor]].

INSAT-1B was deployed by {{OV|099}} during the [[STS-8]] mission. ''Challenger'' lifted off from [[Kennedy Space Center Launch Complex 39|Launch Complex 39A]] at the [[Kennedy Space Center]] at 06:32:00 UTC on 30 August 1983.<ref name="launchlog"/> INSAT-1B was deployed from the orbiter's payload bay at 07:48 UTC on 31 August, with a [[Payload Assist Module|PAM-D]] upper stage firing shortly afterwards to place it into [[geosynchronous transfer orbit]]. The spacecraft used its own propulsion system to raise itself into [[geostationary orbit]]. It received the [[International Designator]] 1983-089B and [[Satellite Catalog Number]] 14318.<ref name="satcat">{{cite web|url=http://planet4589.org/space/log/satcat.txt|title=Satellite Catalog|first=Jonathan|last=McDowell|work=Jonathan's Space Page|access-date=16 November 2013}}</ref>

After some initial problems deploying its solar array,<ref name="SSF234">{{cite book|last=Harland|first=David M|author2=Lorenz, Ralph D.|title=Space Systems Failures|publisher=Springer-Praxis|location=Chichester|year=2005|edition=2006|isbn=0-387-21519-0|page=234}}</ref> INSAT-1B became operational in October 1983. It was located at 74° east for most of its operational life, before being moved to 93° east in 1992. In August 1993 it was decommissioned and raised to a [[graveyard orbit]] slightly above geosynchronous altitude.<ref name="GSP"/> As of 14 November 2013, it is in an orbit with a [[apsis|perigee]] of {{convert|35741|km|mi}}, an [[apsis|apogee]] of {{convert|35846|km|mi}}, [[orbital inclination|inclination]] of 14.69 degrees and an [[orbital period]] of 23.93 hours.<ref name="n2yo"/>

==References==
{{Portal|Spaceflight}}
{{reflist}}

{{INSAT Satellites}}
{{Indian spacecraft}}
{{Orbital launches in 1983}}

[[Category:INSAT satellites]]
[[Category:1983 in India]]
[[Category:1983 in spaceflight]]
[[Category:Spacecraft launched in 1983]]

INSAT-1B - Revision history

Ajay Kumar at 07:50, 2 September 2023