Open AccessThe role of bearing and scan mechanism life testing in the flight qualification of the MODIS instrument
Author(s) -
Vandyk Steven G.,
Dietz Brian J.,
Street Kenneth W.,
Jones William R.,
Jansen Mark J.,
Dube Michael J.,
Sharma Rajeev K.,
Predmore Roamer E.
Publication year - 2002
Publication title -
tribotest
Language(s) - English
Resource type - Journals
eISSN - 1557-685X
pISSN - 1354-4063
DOI - 10.1002/tt.3020090206
Subject(s) - lubricant , bearing (navigation) , x ray photoelectron spectroscopy , scanning electron microscope , materials science , fourier transform infrared spectroscopy , raman spectroscopy , spectroradiometer , lubrication , composite material , forensic engineering , environmental science , chemical engineering , optics , engineering , computer science , physics , artificial intelligence , reflectivity
This paper describes the results of accelerated and operational life tests on bearings for the Moderate Resolution Imaging Spectroradiometer (MODIS). It also describes the post‐test analysis of the disassembled bearings. Analysis was performed using micro‐Raman, micro‐FTIR, X‐ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and size exclusion chromatography (SEC). In general, the three sets of bearings in each of three test stations were in very good condition after accumulating 68, 144, and 209 million cycles, respectively. Some of the bearings exhibited lubricant degradation, indicated by viscous lubricant deposits on the cage and raceways.
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