Mathematics – Logic
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsa41b..03b&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SA41B-03
Mathematics
Logic
7934 Impacts On Technological Systems, 7938 Impacts On Humans, 7944 Ionospheric Effects On Radio Waves, 7959 Models, 7974 Solar Effects
Scientific paper
The AIM (Aeronomy of Ice in the Mesosphere) spacecraft (launched on 25 April 2007) is in low-Earth orbit. Some days after launch, AIM began to exhibit a problem in which it would not always achieve proper receiver uplink communications lock. In this context, we examined solar conditions and geomagnetic activity. We have found that higher solar wind speeds often lead to greater geomagnetic activity and this, in turn, seems to lead to improved AIM operations. In this talk we present analysis of AIM bitlock to show when relative improvements or diminutions in spacecraft operations have occurred. We conclude that the spacecraft bitlock problem clearly is related, in part, to space environment conditions (along with a gradual secular trend toward lower performance). The best predicator of 'good lock' state seems to be a shift from low (or quiet) geomagnetic and solar wind conditions toward more disturbed conditions. It is essential to note that use of space weather forecast tools has been an important, supportive adjunct to this key new space flight program.
Bailey Scott M.
Baker Daniel N.
McCollough J. P.
McPherron Robert L.
Russell James M.
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