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Data Analysis of the Floating Potential Measurement Unit aboard the International Space StationWe present data from the Floating Potential Measurement Unit (FPMU), that is deployed on the starboard (S1) truss of the International Space Station. The FPMU is a suite of instruments capable of redundant measurements of various plasma parameters. The instrument suite consists of: a Floating Potential Probe, a Wide-sweeping spherical Langmuir probe, a Narrow-sweeping cylindrical Langmuir Probe, and a Plasma Impedance Probe. This paper gives a brief overview of the instrumentation and the received data quality, and then presents the algorithm used to reduce I-V curves to plasma parameters. Several hours of data is presented from August 5th, 2006 and March 3rd, 2007. The FPMU derived plasma density and temperatures are compared with the International Reference Ionosphere (IRI) and USU-Global Assimilation of Ionospheric Measurement (USU-GAIM) models. Our results show that the derived in-situ density matches the USU-GAIM model better than the IRI, and the derived in-situ temperatures are comparable to the average temperatures given by the IRI.
Document ID
Acquisition Source
Marshall Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Barjatya, Aroh
(Embry-Riddle Aeronautical Univ. Daytona Beach, FL, United States)
Swenson, Charles M.
(Utah State Univ. Logan, UT, United States)
Thompson, Donald C.
(Utah State Univ. Logan, UT, United States)
Wright, Kenneth H., Jr.
(Alabama Univ. Huntsville, AL, United States)
Date Acquired
August 24, 2013
Publication Date
April 17, 2009
Publication Information
Publication: Review of Scientific Instruments
Publisher: American Inst. of Physics
Volume: 80
Issue: 5
Subject Category
Space Sciences (General)
Report/Patent Number
Funding Number(s)
Distribution Limits
Public Use Permitted.
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