Columbus – External Payload Facility
Encyclopedia
The Columbus External Payload Facility (Columbus-EPF) consists of two identical L-shaped consoles attached to the starboard cone of Columbus
in the zenith (top) and nadir (bottom) positions, each supporting two platforms for external payloads or payload facilities. Four external payloads (payload facilities) can be operated at the same time.
The first Columbus-EPF payload facilities were the European Technology Exposure Facility (EuTEF) and Sun Monitoring on the External Payload Facility of Columbus (Solar), which were installed during the STS-122/1E mission during an extravehicular activity (EVA) by crew members. Atomic Clock Ensemble in Space
and Export will be delivered to the International Space Station
at a later, undetermined date.
In addition to structural support, Columbus can supply power and data (command) to the Columbus-EPF payloads and can poll the payloads for housekeeping (health and status) and user data.
The power and data interfaces available to the Columbus-EPF payloads are directly connected to the Columbus internal distribution systems. Columbus-EPF payloads and payload facilities are controlled and commanded via Columbus using the same data links and ground segment infrastructure used for internal payloads. Each payload has a facility-responsible centre that can transmit commands and receive telemetry via the Columbus Control Centre.
Columbus provides a maximum of 1.25 kW per Columbus-EPF location. Each Columbus-EPF location is connected to two 120-Vdc power feeders, each of which has a maximum allocation of 1.25 kW. Switching between the power feeders is done via the payload power switch box in Columbus and requires the power feeders to be powered down.
The maximum on-orbit mass of an external Columbus-EPF payload, including the adapter plate, is 290 kg. The dimensions of a payload should not exceed 864 x 1168 x 1245 mm without the adapter plate.
in February 2008. Columbus-EPF payloads and payload facilities are transported to and from orbit using a carrier supplied by the ISS Program. The payloads and payload facilities are manoeuvred by the robotic manipulators of the ISS to their final operational locations on the Columbus-EPF. Each payload or payload facility has an open view to ram and to starboard, as well as one to either zenith or nadir. The view in the wake direction is reduced by ISS structures. At the end of its operational phase, a payload is transported to the carrier by robotic means and returned to ground for post-mission inspection and analysis and, possibly, refurbishment.
Columbus (ISS module)
Columbus is a science laboratory that is part of the International Space Station and is the largest single contribution to the ISS made by the European Space Agency ....
in the zenith (top) and nadir (bottom) positions, each supporting two platforms for external payloads or payload facilities. Four external payloads (payload facilities) can be operated at the same time.
The first Columbus-EPF payload facilities were the European Technology Exposure Facility (EuTEF) and Sun Monitoring on the External Payload Facility of Columbus (Solar), which were installed during the STS-122/1E mission during an extravehicular activity (EVA) by crew members. Atomic Clock Ensemble in Space
Atomic Clock Ensemble in Space
Atomic Clock Ensemble in Space is a project led by the European Space Agency which will place an ultra-stable atomic clock on the International Space Station...
and Export will be delivered to the International Space Station
International Space Station
The International Space Station is a habitable, artificial satellite in low Earth orbit. The ISS follows the Salyut, Almaz, Cosmos, Skylab, and Mir space stations, as the 11th space station launched, not including the Genesis I and II prototypes...
at a later, undetermined date.
In addition to structural support, Columbus can supply power and data (command) to the Columbus-EPF payloads and can poll the payloads for housekeeping (health and status) and user data.
The power and data interfaces available to the Columbus-EPF payloads are directly connected to the Columbus internal distribution systems. Columbus-EPF payloads and payload facilities are controlled and commanded via Columbus using the same data links and ground segment infrastructure used for internal payloads. Each payload has a facility-responsible centre that can transmit commands and receive telemetry via the Columbus Control Centre.
Columbus provides a maximum of 1.25 kW per Columbus-EPF location. Each Columbus-EPF location is connected to two 120-Vdc power feeders, each of which has a maximum allocation of 1.25 kW. Switching between the power feeders is done via the payload power switch box in Columbus and requires the power feeders to be powered down.
The maximum on-orbit mass of an external Columbus-EPF payload, including the adapter plate, is 290 kg. The dimensions of a payload should not exceed 864 x 1168 x 1245 mm without the adapter plate.
Facility operations
The Columbus External Payload Facility (Columbus-EPF) was transported to the International Space Station (ISS) with the Columbus module on STS-122/1ESTS-122
STS-122 was a NASA Space Shuttle mission to the International Space Station , flown by the Space Shuttle Atlantis. STS-122 marked the 24th shuttle mission to the ISS, and the 121st space shuttle flight since STS-1....
in February 2008. Columbus-EPF payloads and payload facilities are transported to and from orbit using a carrier supplied by the ISS Program. The payloads and payload facilities are manoeuvred by the robotic manipulators of the ISS to their final operational locations on the Columbus-EPF. Each payload or payload facility has an open view to ram and to starboard, as well as one to either zenith or nadir. The view in the wake direction is reduced by ISS structures. At the end of its operational phase, a payload is transported to the carrier by robotic means and returned to ground for post-mission inspection and analysis and, possibly, refurbishment.
Related publications
- Persson J, Dettmann J. Columbus External Payload Facility - Architecture and Utilisation. Conference and Exhibit on International Space Station Utilization, Cape Canaveral, FL. Oct 15 - 18, ;AIAA-2001-5068. 2001