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Leschly, Kim

Publications and source records attributed to Leschly, Kim.

4 records
All sourcesNASA NTRSDOE OSTI
NASA NTRS2000

The Mars Micromission Spacecraft

The concept of a small common Mars Micromission spacecraft design, using the Ariane-5 GTO piggyback launch opportunities has been studied over the past year by NASA/JPL and CNES. The study is based on the 200 kg ASAP twin configuration, due to its clear performance and cost advantages for planetary missions over the 100-kg ASAP configuration. The spacecraft design commonalty has been explored for the Mars 2003, 2005, and 2007 launch opportunities and for three main mission types: Probe Carrier missions, with one or more probes, measuring 40-80 cm in diameter. Science Orbiter missions, with additional fuel for orbit insertion. and Telecommunication Relay Orbiter missions, with optimal data return link.

Leschly, Kim↗
NASA NTRS1991

The second generation Wide-Field/Planetary Camera on the Hubble Space Telescope

The general design and principal features of the second generation Wide-Field/Planetary Camera (WFPC-2) for the Hubble Space Telescope are reviewed. The discussion covers the background of WFPC-2 development, science capabilities, key performance parameters, optical and electronic equipment, mechanisms, thermal control, and contamination control. Attention is also given to on-orbit operations, including commanding and telemetry and on-orbit servicing.

Leschly, Kim↗
NASA NTRS1990

Strategy for contamination control to improve Wide-Field/Planetary Camera far-ultraviolet performance

A multifaceted contamination control strategy has been developed for the second generated Wide-Field and Planetary Camera (WFPC-2) to improve the FUV stability by several orders of magnitude, compared to the first camera (WFPC-1). The strategy involves: improved on-orbit boil-off capability of the detector optics, added internal shielding and instrument venting, in-process subassembly vacuum bakeout at elevated temperatures, material substitution, sample testing in ultraclean vacuum facility, and internal instrument contamination-transport modeling. A science performance goal of 1 percent photometric accuracy at 1470 A over an extended time (of at least 30 days) has been established as a contamination control target for WFPC-2. The WFPC-2 is currently planned to be launched by the Shuttle in mid-1993 and replace the WFPC-1 which was recently launched with the HST.

Leschly, Kim↗