Badr-4

{{Infobox spaceflight

|name = Badr-4

|image =

|image_caption =

|mission_type = Communication

|operator = Arabsat

|website =

|COSPAR_ID = 2006-051A

|SATCAT =

|mission_duration =

|spacecraft_bus =

|manufacturer = EADS Astrium
Thales Alenia Space

|dry_mass =

|launch_mass = {{convert|3341|kg}}

|power = 12.5 watts

|launch_date = {{start-date|8 November 2006}}

|launch_rocket = Proton-M/Briz-M

|launch_site = Baikonur 200/39

|launch_contractor = ILS

|entered_service =

|disposal_type =

|deactivated =

|orbit_epoch =

|orbit_reference = Geocentric

|orbit_regime = Geostationary

|orbit_periapsis =

|orbit_apoapsis =

|orbit_inclination =

|orbit_period = 24 hours

|orbit_longitude = 26.0º East

|orbit_slot =

|apsis =

|trans_band =

|trans_frequency =

|trans_bandwidth =

|trans_capacity =

|trans_coverage =

|trans_TWTA =

|trans_EIRP =

|trans_HPBW =

}}

Badr-4 (a.k.a. Arabsat 4B) is an EADS Astrium-built{{cite web|url=http://www.astrium.eads.net/en/prog/badr-4-badr-6.html|title=Badr-4 & Badr-6|publisher=EADS Astrium|access-date=22 July 2010|url-status=dead|archive-url=https://web.archive.org/web/20100715031933/http://www.astrium.eads.net/en/prog/badr-4-badr-6.html|archive-date=15 July 2010 }} communications satellite operated by Arabsat, launched 8 November 2006 on a Proton-M/Briz-M rocket.{{cite news|title=ILS Proton Successfully Launches Arabsat's BADR-4 Satellite|url=https://www.ilslaunch.com/ils-proton-successfully-launches-arabsats-badr-4-satellite/|date=November 9, 2006|publisher=International Launch Services|access-date=January 28, 2023}} It provides fixed satellite communications services in C- and K_u-bands from the 26° East orbital position.{{cite web|url=http://www.lyngsat.com/badr4.html|title=Badr 4 at 26.0°E|publisher=LyngSat}}

The satellite is based on the Eurostar E2000+ platform. Its payload was supplied by Alcatel Alenia Space. The Badr-4-payload consists of 28 active channels in K_u band (16 in BSS and 12 in FSS). Payload power is about 6 kW. The satellite has two 2.5 m deployable antennas and one 1.35 m top floor antenna.

Due to success of the satellite, Arabsat let another agreement for an upgraded version of Badr-4 communication satellite: in June 2006, Arabsat gave the contract to EADS Astrium for construction of Badr-6, a high-power broadcast satellite to cover the Middle East and Africa. Badr-6 was launched by an Ariane 5 on 7 July 2008.{{cite news|title=Two satellites in orbit after good ride from Ariane 5|first=Justin|last=Ray|publisher=Spaceflight Now|date=July 7, 2008|url=https://spaceflightnow.com/ariane/v184/|access-date=January 28, 2023}}