Earth, Lunar Studies, Photogrammetry, Planetary Analogs, Planetary Surfaces, Small Bodies, Planetary surface processes on Mars, Earth, the Moon, Europa, and Io, planetary volcanism, aeo- lian processes, geomorphology, digital terrain modeling, geologic mapping, remote sensing, field geology, stereophotogrammetry, change detection of active planetary surfaces, image processing, optical instrumentation and calibration, digital signal processing.