The Chandra X-ray Observatory is the U.S. follow-on to the Einstein
Observatory. Chandra was formerly known as AXAF, the Advanced X-ray
Astrophysics Facility, but renamed by NASA in December, 1998.
Originally three instruments and a high-resolution mirror carried in
one spacecraft, the project was reworked in 1992 and 1993. The Chandra
spacecraft carries a high resolution mirror, two imaging detectors,
and two sets of transmission gratings. Important Chandra features are:
an order of magnitude improvement in spatial resolution, good
sensitivity from 0.1 to 10 keV, and the capability for high spectral
resolution observations over most of this range.
Execution service - implemented in the Common Execution Architecture - that generates context information on-demand. This service provides one or more science applications that are registered separately
Service that performs transformation between coordinate sets. Service is implemented in the Common Execution Architecture and is in fact part of the CXS.
Database that resolves how to access records in problematic datasets. There are several distinct types of table: 1) Planetary observations stored in NASA's PDS and ESA's PSA; 2) Small FOV, pointed solar instruments; 3) Observations in the Global H-alpha Network.