INSAT-2E

{{Use dmy dates|date=March 2024}}

{{Infobox spaceflight

| name = INSAT-2E

| image =

| image_caption =

| mission_type = Communication
Weather

| operator = INSAT

| website =

| COSPAR_ID = 1999-016A

| SATCAT =

| mission_duration = 12 years (planned)

| spacecraft_bus = INSAT-2/3

| manufacturer = ISRO

| dry_mass =

| launch_mass = {{convert|2550|kg}}

| power = 2,050 watts

| launch_date = {{start-date|2 April 1999, 22:03 UTC|timezone=yes}}

| launch_rocket = Ariane 42P

| launch_site = Kourou ELA-2

| launch_contractor = Arianespace

| entered_service =

| disposal_type =

| deactivated =

| orbit_epoch = 2 May 1999{{cite web |last=McDowell |first=Jonathan |title=SATCAT |url=http://planet4589.org/space/log/satcat.txt |publisher=Jonathan's Space Pages |access-date=3 May 2018}}

| orbit_reference = Geocentric

| orbit_regime = Geosynchronous

| orbit_periapsis = {{convert|35766|km|mi}}

| orbit_apoapsis = {{convert|35806|km|mi}}

| orbit_inclination = 0.05 degrees

| orbit_period = 1436.06 minutes

| orbit_longitude = 83° East

| orbit_slot =

| apsis = gee

| trans_band = 17 G/H band

| trans_frequency =

| trans_bandwidth =

| trans_capacity =

| trans_coverage =

| trans_TWTA =

| trans_EIRP =

| trans_HPBW =

}}

INSAT-2E is an Indian geostationary communications and weather satellite which is operated by the Indian National Satellite System. It is positioned in geostationary orbit at a longitude of 83° East, from where it is used to provide communications services to Asia and Australia. It also carries two meteorological instruments; the Very High Resolution Radiometer, and a CCD camera capable of returning images with a resolution of one kilometre.{{cite web |url=http://www.isro.org/satellites/insat-2e.aspx |title=INSAT-2E |publisher=Indian Space Research Organisation |access-date=2009-08-08 |archive-url=https://web.archive.org/web/20130818091155/http://isro.org/satellites/insat-2e.aspx |archive-date=18 August 2013 |url-status=dead }}

The communications payload aboard INSAT-2E consists of seventeen G/H band (IEEE C band) transponders.{{cite web |url=http://space.skyrocket.de/doc_sdat/insat-2e.htm |title=Insat 2E / Intelsat APR-2 |first=Gunter |last=Krebs |publisher=Gunter's Space Page |access-date=2009-08-08}} At launch the satellite had a mass of {{convert|2550|kg}}, with an expected operational lifespan of 12 years.{{cite web |url=http://www.ucsusa.org/nuclear_weapons_and_global_security/space_weapons/technical_issues/ucs-satellite-database.html |title=UCS Satellite Database |publisher=Union of Concerned Scientists |date=1 July 2009 |access-date=2009-08-08}} Some of its transponders are leased to Intelsat, who operate them under the designation Intelsat APR-2.

INSAT-2E was launched by Arianespace, using an Ariane 42P carrier rocket flying from ELA-2 at the Guiana Space Centre. The launch occurred at 22:03 UTC on 2 April 1999.{{cite web |url=http://planet4589.org/space/log/launchlog.txt |title=Launch Log |last=McDowell |first=Jonathan |publisher=Jonathan's Space Page |access-date=2009-08-08}} Following launch, it raised itself into geostationary orbit using liquid-fuelled apogee motor. Its final insertion burn occurred at 07:38 UTC on 8 April.{{cite web |url=http://planet4589.org/space/log/geo.date |title=Index |work=Geostationary Orbit Catalog |last=McDowell |first=Jonathan |publisher=Jonathan's Space Page |access-date=2009-08-08 |archive-url=https://web.archive.org/web/20100406015538/http://www.planet4589.org/space/log/geo.date |archive-date=6 April 2010 |url-status=dead }} Following insertion, it was positioned at a longitude of 83° East.

INSAT-2E is using ultra-light Magnesium-lithium alloys developed by DMRL.The Magnesium-lithium sheets were supplied to ISAC, Bangalore center.{{cite journal | url=https://link.springer.com/article/10.1007/BF02757554 | doi=10.1007/BF02757554 | title=Development of ultra light magnesium-lithium alloys | date=1994 | last1=Chakravorty | first1=C. R. | journal=Bulletin of Materials Science | volume=17 | issue=6 | pages=733–745 | url-access=subscription }}