Multi Purpose Small Payload Rack (MSPR) - 01.30.19

Summary | Overview | Operations | Results | Publications | Imagery

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The Multi Purpose Small Payload Rack (MSPR) is a multipurpose payload rack system used in the Japanese Experiment Module (JEM). The MSPR has two workspaces and a work table that can be used for wide fields of space environment utilization including science and educational missions.
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Information Pending

The following content was provided by Tsuyoshi Ito, and is maintained in a database by the ISS Program Science Office.
Facility Details


Facility Manager(s)
Tsuyoshi Ito, Japan Aerospace Exploration Agency, Tsukuba, Japan

Facility Representative(s)
Nakanoya Sogo, Japan Aerospace Exploration Agency, Tsukuba, Japan

Japan Aerospace Exploration Agency, Tsukuba, Tsukuba, Japan

Sponsoring Space Agency
Japan Aerospace Exploration Agency (JAXA)

Sponsoring Organization
Information Pending

ISS Expedition Duration
March 2013 - March 2016; March 2016 - March 2019

Expeditions Assigned

Previous Missions
Information Pending

Information Pending

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Facility Description

Facility Overview

The Multipurpose Small Payload Rack (MSPR) consists of the following:
Work Volume (WV)
A workspace for the experiments, such as Aquatic Habitat experiments and the combustion experiments. The WV also accommodates other equipment for science and educational missions within its function. The WV contains a Nitrogen gas supply and an exhaust line. Its dimensions are 600 mm(H) × 900 mm(W) ×700 mm(D), and has 350L of volume.
Small Experiment Area (SEA)
A volume for small size experiments that do not need many resources such as crystallization experiments. Vibration isolation from WV and crew can also be accommodated. Its dimensions are 300 mm(H) × 411 mm(W) × 529 mm(D), and has a volume of 70L.
The WV and SEA also provide the following capabilities:
  • Heat rejection, smoke detection of the user’s equipment.
  • Emergency power supply cutoff.
  • Management of noise and emissions generated from user’s equipment for crew safety.
Workbench (WB)
A work table for crews maintaining user’s equipment, exchanging samples and reviewing data. Its area is about 0.5m2. The WB is the only work table in the JEM and can be stored into the rack when it is not in use. Power for LAPTOP PC is also available. The MSPR also contains a double enclosed chamber for combustion and other experiments that require enclosed and/or exhaust systems in the JEM. It can be set up into WV. User area dimensions are 520mm(H) × 550mm(W) × 354mm(D).
Supplied interfaces: 28[VDC], 16[VDC], 5[VDC]
Power Supply:
  • WV and SEA: Total 500[W]
  • Workbench 100[W] (16[VDC] for LAPTOP PC).
As MSPR, one of following is available (recorded, downlink). NTSC video × 3[ch] or High-definition television (HDTV) × 1[ch].
Protocol: Ethernet, USB User’s equipment ⇔ LAPTOP PC, LAPTOP PC ⇔ Users on the ground.

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Facility Operations

  • Transported inside the Japanese Experiment Module (JEM) to orbit with sub-rack facilities.
  • Checkout of MSPR is performed following transfer and installation into the Japanese Experiment Module (JEM) Pressurized Module (PM), Kibo, on the International Space Station.

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Decadal Survey Recommendations

Information Pending

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Results/More Information

Information Pending

Results Publications

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Ground Based Results Publications

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ISS Patents

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Related Publications

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Related Websites

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NASA Image: ISS030E051039 - View of MSPR Rack in the Japanese Experiment Module (JEM) Pressurized Module (JPM) taken during Expedition 30.

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