Japanese ISS module, used on ISS press conferences
Japanese Experiment Module
The Japanese Experiment Module (JEM), nicknamed Kibō (きぼう, Kibō, Hope), is a Japanese science module for the International Space Station (ISS) developed by JAXA. It is the largest single ISS module, and is attached to the Harmony module. The first two pieces of the module were launched on Space Shuttle missions STS-123 and STS-124. The third and final components were launched on STS-127.[1]
The Pressurized Module (PM) is the core component connected to the port hatch of Harmony. It is cylindrical in shape and contains twenty-three International Standard Payload Racks (ISPRs), ten of which are dedicated to science experiments while the remaining thirteen are dedicated to Kibō's systems and storage.[4] The racks are placed in a 6-6-6-5 format along the four walls of the module. The end of the PM has an airlock and two window hatches. The exposed facility, experiment logistics module, and remote manipulator system all connect to the PM. It is the location for many of the press conferences that take place on board the station.
The Exposed Facility (EF), also known as "Terrace", is located outside the port cone of the PM (which is equipped with an airlock). The EF has twelve Exposed Facility Unit (EFU) ports which attach to Payload Interface Unit (PIU) connectors on EF-equipment exchange units (EF-EEUs). All experiment payloads are fully exposed to the space environment. For proper functioning of these experiments, the payload requires an orbital replacement unit (ORU), consisting of the electrical power system (EPS), communications and tracking (CT), and the thermal control system (TCS). Of the twelve ORUs, eight are replaceable by the JEMRMS while the other four are EVA-replaceable.
The experiment logistics module (ELM) includes two sections:
The pressurized section (ELM-PS), also called the JLP (Japanese logistics pressurized), is a pressurized addition to the PM. It is used as a storage facility, providing storage space for experiment payloads, samples and spare items.[5]
The unpressurized (external) section (ELM-ES) serves as a storage and transportation module. It was used to transfer external experiments with the Space Shuttle. It is not used after the retirement of the shuttle.[6][7]
The JEM remote manipulator system (JEMRMS) is a 10 m (33 ft) robotic arm, mounted at the port cone of the PM. It is used for servicing the EF and for moving equipment to and from the ELM. The JEMRMS control console was launched while inside the ELM-PS, and the main arm was launched with the PM. The small fine arm, which is 2 m (6 ft 7 in) long and attaches to the end effector of the main arm, was launched aboard HTV-1 on the maiden flight of the HTV spacecraft. Once HTV had docked, the small fine arm was assembled by the crew and deployed outside the airlock to test it. The JEMRMS grappled the arm and unfolded it to flex the joints before stowing it onto the EF.[8] The free end of the JEMRMS is able to use the same type of grapple fixtures that the Canadarm2 uses.[9]
Inter-orbit Communication System (ICS) consists of a rack of communication module in the Pressurized Module (ICS-PM) and the antenna module to be attached on the Exposed Facility (ICS-EF).[10] It was used to communicate with the ground station via JAXA's communication technology demonstration satellite DRTS "Kodama" [ja].
After the decommissioning of DRTS in August 2017, Kibō relies on the ISS's Ku band communication through NASA's TDRSS. ICS-EF was disposed by jettisoning into orbit in February 2020[11] and reentered on March 17, 2023[12] over Sacramento, California.[13]
The EF and ELM-ES arriving at the Kennedy Space Center
Technicians working on the remote manipulator system at KSC
NASA launched the JEM complex over three flights using the Space Shuttle. The shuttle had a large payload bay which carried the modules into orbit along with the crew. This is in contrast to the Russian modules, which are launched into orbit on multistage Proton rockets and then rendezvous and dock with the station automatically.
On 30 May 2003, the Pressurized Module (PM) arrived at KSC from Japan.[16] It was stored at the SSPF until launched into orbit aboard Discovery on 31 May 2008 as part of the STS-124 mission.[17] On 3 June 2008, the PM was attached to the Harmony module. At first the ELM-PS, the small cargo bay, was connected to a temporary location on Harmony and later, on 6 June 2008, was moved to its final berthing location on top (zenith) of the main laboratory.
The Exposed Facility (EF) and Experiment Logistics Module-External Section (ELM-ES) arrived at KSC on 24 September 2008.[18] The two elements were launched on Endeavour on 15 July 2009 as part of the STS-127 mission.[19] The ELM-ES was brought back to Earth at the end of the mission. The assembly of the EF was completed during the fifth spacewalk of the mission.[20]
Close view of the exterior panels of the Pressurized Module and Logistics Module, during STS-132A prototype for the Small Fine Arm was tested during the STS-85 space shuttle mission in 1997.[21]
Handling Capacity: Max. 7000|kg(Payload size: 1.85m x 1.0m x 0.8m / weight: less than 500kg)
Small Fine Arm (SFA)
Length: 2.2 metres (7 ft 3 in)
Mass: 190 kilograms (420 lb)
Handling Capacity: Max. 80kg with Compliance Control Mode, Max. 300kg without Compliance Control Mode(ORU size: 0.62 x 0.42 x 0.41m / weight: 80kg max)
The module and all its integrated accessories were manufactured at the Tsukuba Space Center in Japan. It is made from stainless steel, titanium, and aluminum.
MAXI – X-ray astronomy from 0.5 to 30 keV.[27] Exposed Facility Slot 1.
STP Houston 8 Payload-COWVR and TEMPEST[28] Launched on SpaceX CRS-24 in 2021. Exposed Facility Slot 2 port originally held CREAM which was moved to Slot 13 on the roof and stowed in hibernation.
ILLUMA-T – Laser communication payload. Exposed Facility Slot 3 port originally held SMILES and OCO 3. [29]
OCO-3 – Monitoring of carbon dioxide in the Earth's atmosphere using a flight spare from OCO-2.[30] Relocated to Exposed Facility Slot 4 from Slot 3 port originally held NREP.
NREP – Nanoracks External Platform. NREP-2 is the current mission on this pallet. Payload is stowed waiting for NREP 3 then it will be transferred to Slot 12.
i-SEEP – IVA-replaceable Small Exposed Experiment Platform (JAXA). Mounted to Exposed Facility Slot 5.[31] It is a platform to support small-to-medium (less than 200 kg) payloads. Experiments on the i-SEEP platform are HDTV-EF2 (since 2017), GPSR/Wheel,[32] SOLISS (since 2019 removed in 2023 and stowed), and SeCRETS .[33]
GEDI – Global Ecosystem Dynamics Investigation on ISS. Exposed Facility Slot 6 in hibernation until STP-H8 is removed and MOLI is installed. Port originally held ICS-EF and temporary held CREAM until it was relocated to Slot 13 on the roof of the Logistics Module and placed in hibernation.
CREAM – Cosmic Ray Energetics and Mass Experiment. Launched on SpaceX CRS-12 in 2017. Initially at Exposed Facility Slot 2. Moved to Slot 7 in 2021[34] and back to Slot 2 in 2023 to make room for STP Houston 9. Logistics Module Slot 13 in hibernation until STP-H9 is removed then it will go back to Slot 2.
HISUI – Hyperspectral Imager Suite (METI) replacement for HREP which ended its mission in 2017.[35] Exposed Facility Slot 8 port originally held MCE.
CALET – CALorimetric Electron Telescope (JAXA), observation for high energy cosmic rays. Launched aboard Kounotori 5 (HTV-5).[36] Mass: 2500 kg.[37] Exposed Facility Slot 9 port originally held SEDA-AP.
ExHAM 1 and 2 – External Facility Handrail Attach Mechanism (JAXA).[38] Mounted to the deck on handrails in the forward and aft locations next to slots 7 and 10.
ECOSTRESS – Ecosystem Spaceborne Thermal Radiometer Experiment on Space Station.[39] Exposed Facility Slot 10 port originally held the ELM-ES and the HTV Transfer Pallet.
STP-H9-SWELL (Space Wireless Energy Laser Link), A test payload for Laser Communications a follow on to OPALS,Electric Propulsion Electrostatic Analyzer, A test device that will demonstrate re-boost using Ion Propulsion, Neutron Radiation Detection Instrument from NRL, Variable Voltage Ion Protection Experiment from NRL, ECLIPSE (Experiment for Characterizing the Lower Ionosphere and Production of Sporadic-E), Glowbug, cosmic ray detector built in conjunction with NASA, an experiment that will study cosmic rays for two years, SpaceCube Edge Node Intelligent Collaboration, an experiment built by NASA Goddard that will study microchips and artificial intelligence exposed to the vacuum of space, and SOHIP, a hyperspectral imager built by Livermore Labs that will study the atmosphere for two years. Exposed Facility Slot 7 port originally held HREP and GEDI which was relocated to Slot 7 and placed in hibernation.[40]
SEDA-AP – Space Environment Data Acquisition equipment-Attached Payload. Measures neutrons, plasma, heavy ions, and high-energy light particles in the station's orbit.
ICS-EF – Inter-orbit Communication System-Exposed Facility, Japanese communication system. Originally at the Exposed Facility Slot 7.[47]
^"STS-124 Press Kit"(PDF). NASA. Archived(PDF) from the original on 24 November 2010. This article incorporates text from this source, which is in the public domain.
^"OCO-3". NASA Science Mission Directorate. Archived from the original on 3 May 2018. Retrieved 7 May 2018. This article incorporates text from this source, which is in the public domain.
Launches are separated by dots ( • ), payloads by commas ( , ), multiple names for the same satellite by slashes ( / ). Crewed flights are underlined. Launch failures are marked with the † sign. Payloads deployed from other spacecraft are (enclosed in parentheses).
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This article incorporates text from this source, which is in the public domain.
