Skip to content
79,433 pages · 13,741 images · since 1994 Browse A–Z Today in space history
Encyclopedia Astronautica The full story of spaceflight
Encyclopedia entry

Alphabus

Spacecraft · USA

FURTHER INFORMATION ON THIS TOPIC AT OUR PARTNER SITE

Original archive entry. The text, images and links below are kept as they were written.

Alphasat
Alphasat
Credit: Manufacturer Image

Testbed communications satellite, a joint project between the European Space Agency and Inmarsat.

Demonstrated a laser communications system and radio communications links in Q and V band; carried an operational extended L-band payloadto supplement Inmarsat's satellite broadband capacity. First flight of the new Astrium/Lampoldshausen 500N EAM (European Apogee Motor), a MON/MMH system with an Isp of about 325s. Dry mass iaround 3500 kg.

More at: Alphabus.

Subtopics

Country
USA
Launch Vehicles
Ariane 5, Ariane 5ECA
Launch Sites
Kourou ELA3
Bibliography
6339, 12043

Chronology

1 event

2013 July 25

19:54 GMT - . Launch Site: Kourou. Launch Complex: Kourou ELA3. LV Family: Ariane 5. Launch Vehicle: Ariane 5ECA.
  • Alphasat - . Payload: I-4A F4. Mass: 6,500 kg (14,300 lb). Nation: USA. Class: Communications. Type: Communications satellite. Spacecraft: Alphabus. USAF Sat Cat: 39215 . COSPAR: 2013-038A. Apogee: 35,796 km (22,242 mi). Perigee: 35,777 km (22,230 mi). Inclination: 0.40 deg. Period: 1,436.09 min.

    Testbed communications satellite, a joint project between the European Space Agency and Inmarsat. Demonstrated a laser communications system and radio communications links in Q and V band; carried an operational extended L-band payloadto supplement Inmarsat's satellite broadband capacity. First flight of the new Astrium/Lampoldshausen 500N EAM (European Apogee Motor), a MON/MMH system with an Isp of about 325s. Dry mass iaround 3500 kg. By July 30 Alphasat was in a 25608 x 35809 km x 0.3 deg orbit.