Results of investigating the orbital and configuration influences on t
he Upper Atmosphere Research Satellite's dynamic response are presente
d. Orbital influences were due to temperature variation from crossing
the Earth's terminator and variation of the solar incident energy as t
he orbit precessed. During the terminator crossing, the rapid ambient
temperature change caused the spacecraft's two flexible appendages to
experience thermal elastic bending (thermal snap). The resulting respo
nse was dependent on the orientation of the solar array and the solar
incident energy. Orbital influences were also due to onboard disturban
ces, environmental disturbances, and spacecraft configuration changes
resulting in dynamic responses that were repeated each orbit. Configur
ation influences were due to the solar array rotation's changing of th
e spacecraft modal properties. The orbital and configuration influence
s produced measurable spacecraft attitude variations as well as modal
and amplitude trends in those variations.