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In respect to descent trajectory optimization of stratospheric airships, thermal effects were considered. Basic thermal characteristics of stratospheric airships and energy equations about the film and the internal gas were introduced. Besides, the equations of motion for the airship were described in details. To minimum the flight time, a direct collocation method was adopted to convert the trajectory...
Monitoring environmental changes from space requires extremely well-calibrated observations to achieve the necessary high accuracy and stability. The calibration differences between the Moderate Resolution Imaging Spectroradiometer (MODIS) and the Advanced Very High Resolution Radiometer (AVHRR) thermal bands provide a valuable quality assessment of the instrument performance. This letter compares...
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