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A borehole that penetrated 585 m of soil deposits and terminated 9 m into Paleozoic bedrock was completed near the New Madrid Seismic Zone of the central United States. A vertical array of strongmotion accelerometers and broadband seismometers–the Central United States Seismic Observatory (CUSSO) was installed. CUSSO provides a test site for verification(More)
The paper presents a method by sliding window to find an optimal satellite maneuvering time with analyzing the change of constellation geometry at different time. Navigation satellites not only broadcast the signals, the orbits and clock corrections etc., but also keep an in-view constellation, which are the factors affecting users to calculate position.(More)
The time-optimal attitude maneuver problem of a rigid spacecraft with only two control torques along its principal axes is studied using Radau Pseudospectral Method (RPM). The asymmetric and symmetric spacecraft have been considered in particular. First, we establish the attitude dynamical models of asymmetric and symmetric spacecraft with two controls, and(More)
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