Verification of the Effectiveness of Devices for the Protection of the Exterior Surface of ISS from Contaminants Deposited by Pulsed Cycling of Liquid-Jet (Kromka) - 10.21.14

Overview | Description | Applications | Operations | Results | Publications | Imagery
ISS Science for Everyone

Science Objectives for Everyone
Kromka investigates the contamination of critical external surfaces (such as radiators, solar arrays, etc) caused by propulsion thrusters of the various vehicles flying to the ISS and is assessing the efficiency of various gas-dynamic protective devices to minimize thruster contamination.

Science Results for Everyone
Information Pending

The following content was provided by Yu I. Gerasimov, and is maintained in a database by the ISS Program Science Office.

Experiment Details


Principal Investigator(s)

  • Yu I. Gerasimov, Keldysh Research Center, Russia

  • Co-Investigator(s)/Collaborator(s)
    Information Pending
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    Sponsoring Space Agency
    Russian Federal Space Agency (Roscosmos)

    Sponsoring Organization
    Information Pending

    Research Benefits
    Information Pending

    ISS Expedition Duration
    August 2001 - September 2006

    Expeditions Assigned

    Previous ISS Missions
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    Experiment Description

    Research Overview
    Information Pending

    Checkout of the efficiency of operation of gas-dynamic protective devices accommodated on the Service module and designed to protect the ISS surfaces against contaminants produced by pulse activation of control liquid-jet thrusters. Study of the effect of contaminants deposition on the characteristics of materials specimens and external coatings of the ISS elements (radiators, solar array panels, etc.).

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    Space Applications
    Information Pending

    Earth Applications
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    Operational Requirements
    Boards with materials specimens.

    Operational Protocols
    Installation of boards with materials specimens on the external surface of the Zvezda Service module (SM) of the ISS RS in the periphery area of the jet of the thrusters nozzles during extravehicular activity. Passive exposure of the boards on the SM external surface. Dismounting of the boards after long-duration exposure during extravehicular activity and their return to the ground for processing of the experiment results.

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    Results/More Information
    Assessment of the efficiency of gas-dynamic protective devices and development of recommendations (if necessary) on possible modifications thereof.

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    Results Publications

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    Ground Based Results Publications

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    ISS Patents

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    Related Publications

      Rebrov SG.  The Contamination Impact on Spacecraft of Control Liquid-propellant Low-thrust jets Using Nitrogen Tetroxide and UDMH Components. 3rd International Conference on Small Satellites, Korolev, Russia; 2002

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    Related Websites
    Energia - Science Research on the ISS Russian Segment

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    image One of the specimen boards.
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