Exposed Experiment Handrail Attachment Mechanism (EXHAM Facility) - 07.11.18

Summary | Overview | Operations | Results | Publications | Imagery

ISS Science for Everyone

Science Objectives for Everyone
Taking advantage of Kibo’s unique function having both airlock and robotic arm among modules on the ISS, ExHAM enables space experiments in an exposed environment by attaching it onto the Japanese Experiment Module Kibo’s Exposed Facility (EF).
Science Results for Everyone
Information Pending

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

OpNom: Handhold Exp Platform

Facility Manager(s)
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Facility Representative(s)
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Tsukuba Space Center, Tsukuba, Ibaraki, Japan
Kawasaki Heavy Industries, LTD., Kagamihara, Gifu, Japan

Sponsoring Space Agency
Japan Aerospace Exploration Agency (JAXA)

Sponsoring Organization
Japan Aerospace Exploration Agency

ISS Expedition Duration
September 2015 - March 2016; March 2016 - September 2016; April 2017 - September 2017

Expeditions Assigned

Previous Missions
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  • Onboard
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    Facility Description

    Facility Overview
    ExHAM is a cuboid mechanism equipped with a grapple fixture on the upper surface for the Kibo's robotic arm, Japanese Experiment Module Remote Manipulator System Small Fine Arm (JEMRMS SFA) grapple and attaching parts on the under surface for fixation to the handrail on the Kibo’s EF. The number of loadable experiment samples is 7 on the upper surface and 13 on the side surfaces.

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    Facility Operations
    ExHAM and experiment samples can be delivered as part of cargo aboard ISS supply vehicles, such as H-II Transfer Vehicle “KOUNOTORI”. Their checkout is performed by the onboard crewmembers followed by the transfer to the outboard through the Kibo’s airlock. Then, the ExHAM with the experiment samples are grappled by the JEMRMS SFA and attached to the handrail.

    After the experiment is over, the ExHAM is retrieved from the handrail by the JEMRMS SFA again and returned to the Kibo’s Pressurized Module (PM) via Kibo’s airlock. They can be returned to Earth as cargo aboard the Russian Soyuz Spacecraft or the U.S. Dragon spacecraft.

    In the past, opportunities for conducting experiments in the exposed environment was limited since it requires onboard crew’s Extravehicular Activity (EVA) for installing and retrieving the experiment equipment. Kibo’s unique facility increases experiment opportunities in the exposed environment.

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    Decadal Survey Recommendations

    Information Pending

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    Results/More Information

    Results Publications

      Kurihara M, Higashide M, Takayanagi Y, Arai K, Yano H, Tabata MJ, Hasegawa S, Yamagishi A.  Impact Frequency Estimate of Micron-sized Meteoroids and Debris on Tanpopo Capture Panels on the ISS. Procedia Engineering. 2015; 103: 334-340. DOI: 10.1016/j.proeng.2015.04.055.

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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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    image NASA Image: ISS045E084246 - Documentation of the Handhold Experiment Platform (HXP) following installation of samples for ExHAM-MDM2 experiment operations.
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    image NASA Image: ISS048E025920 - View of the JEM (Japanese Experiment Module) Exposed Facility (JEF) taken through a window in the Kibo Japanese Experiment Pressurized Module (JPM). An Exposed Experiment Handrail Attachment Mechanism (ExHAM) and a Exposed Facility Unit (EFU) is in view.
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