The Mars Exploration Rover Project
In mid-2003 NASA will launch two identical rovers to mars. The mars exploration rovers will be enclosed in Mars Pathfinder heritage cruise and entry stages.
Mars Exploration Rover Project↗
Engineering topics
Callas, J.
Publications and source records attributed to Callas, J..
Mars exploration rover project
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Mars rovers↗
Feasibility of a Miniature, Low-Voltage Scanning Electron Microscope for In-Situ Applications
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in-situ applications scanning electron microscope↗
The Mars Relay
The UHF Mars Relay onboard the orbiting Mars Global Surveyor spacecraft provides data relay capability for landed systems on Mars.
Mars Mars Global Surveyor spacecraft UHF Mars Rela↗
High-Resolution Gamma-Ray Imaging Measurements Using Externally Segmented Germanium Detectors
Fully two-dimensional gamma-ray imaging with simultaneous high-resolution spectroscopy has been demonstrated using an externally segmented germanium sensor. The system employs a single high-purity coaxial detector with its outer electrode segmented into 5 distinct charge collection regions and a lead coded aperture with a uniformly redundant array (URA) pattern. A series of one-dimensional responses was collected around 511 keV while the system was rotated in steps through 180 degrees. A non-negative, linear least-squares algorithm was then employed to reconstruct a 2-dimensional image. Corrections for multiple scattering in the detector, and the finite distance of source and detector are made in the reconstruction process.
spectroscopy gamma ray germanium sensor nucleosynt↗