Inmarsat-6 F1

{{Use British English|date=October 2021}}

{{Use dmy dates|date=October 2021}}

{{Infobox spaceflight

| name = Inmarsat-6 F1

| names_list = I6 F1

| image =

| image_caption =

| image_size = 300px

| mission_type = Communications

| operator = Inmarsat

| COSPAR_ID = 3021-128A

| SATCAT = 50319

| website =

| mission_duration = 15 years (planned)

| spacecraft_bus = Eurostar 3000EOR

| manufacturer = Airbus Defence and Space

| launch_mass = {{cvt|5470|kg}}

| dimensions =

| power = 21 kW

| launch_date = 22 December 2021, 15:32 UTC{{cite web|url=https://www.bbc.co.uk/news/science-environment-59747515|title=Inmarsat launch initiates a technology refresh|publisher=BBC News|date=December 22, 2021|access-date=December 22, 2021}}

| launch_rocket = H-IIA 204 (F45)

| launch_site = Tanegashima, LA-Y1

| launch_contractor = Mitsubishi Heavy Industries{{cite web|url=https://www.mhi.com/news/170912.html|title=MHI selected by Inmarsat to launch its first Inmarsat-6 satellite |publisher=Mitsubishi Heavy Industries|date=12 September 2017|access-date=22 December 2021}}

| entered_service =

| disposal_type =

| deactivated =

| last_contact =

| orbit_reference = Geocentric orbit

| orbit_regime = Geostationary orbit

| orbit_longitude =

| apsis = gee

| trans_band = L-band (ELERA)
Ka-band (Global Xpress)

| trans_frequency =

| trans_bandwidth =

| trans_capacity =

| trans_coverage =

| programme = INMARSAT Fleet

| previous_mission = Inmarsat-5 F5

| next_mission = Inmarsat-6 F2

}}

Inmarsat-6 F1 is a communications satellite to be operated by the British satellite operator Inmarsat and designed and manufactured by Airbus Defence and Space on the Eurostar 3000EOR satellite bus. Part of the Inmarsat-6 satellite fleet, it will be Inmarsat's first dual-payload satellite, with capabilities in both L-band (ELERA) and Ka-band (Global Xpress). Claimed to be the largest and most sophisticated commercial telecommunications satellite ever launched, as the first of two such vehicles, it was placed into supersynchronous transfer orbit on 22 December 2021.{{cite web|url=https://www.inmarsat.com/en/about/technology/satellites.html|title=Satellites|publisher=Inmarsat|quote=The first Inmarsat-6 spacecraft is scheduled for launch with Mitsubishi Heavy Industries (MHI) at the end of 2021 with the second to follow in 2022.|access-date=22 December 2021}}

The platform uses electric propulsion for orbit raising in order to reduce the mass compared to traditional systems. The I-6 satellites will be powered by Safran/Snecma PPS-5000 electric propulsion will then raise the satellite into final geosynchronous orbit and will include two deployable solar arrays and batteries. The design life of the I-6F1 will be 15 years.{{Cite web |last=aerospace-technology |title=Inmarsat-6 (I-6) Satellites |url=https://www.aerospace-technology.com/projects/inmarsat-6-i-6-satellites/ |url-status=live |archive-url=https://web.archive.org/web/20230115155342/https://www.aerospace-technology.com/projects/inmarsat-6-i-6-satellites/ |archive-date=2023-01-15 |website=Verdict Media Limited.}}