HST and FUSE DADS retrievals will be down from Tuesday, September 2 through Wednesday Sept 3 for a DADS/OPUS installation. See list of alternative data sources. During part of this time, the database will also be down and so searches will be down during that time (HLA and GALEX are unaffected by this downtime).

Data Reduction/Analysis

Analyzing Individual Scans - Examples of analyzing raw data scans.
Reading Copernicus Files
Early Project Memos - The following are early Copernicus memos (HTML versions courtesy of Jim Caplinger, CSC) describing various aspects of Copernicus data. The following individual articles are included:
1. Stray Light in PEP - 8 December 1972
2. Stray Light in PEP, II - 15 December 1972
3. Scattered Light in U1 - 2 March 1973
4. Background in Copernicus Data Tubes - 9 December 1974
5. U1 Instrumental Profile - 11 April 1975
6. Corrections to the U2 Wavelength Scale Between 1026 and 1110Å - 7 January 1976
7. Spurious Emission Line Detection - 12 January 1976
8. Sensitivity Loss in Copernicus - 8 September 1982
Background Issues - a look at the sources of background counts in scans.
Common Data Problems - including data register overflow, changes in the particle background (South Atlantic Anomaly), tracking errors, and other glitches.
Photometric Reductions - describes the photometric corrections used for the Copernicus Spectral Atlases by Rogerson, et al. including a discussion on correcting for guidance variations.
Observation Time Correction - describes the algorithm used to duplicate the start and end observation times found listed in old Copernicus computer printouts.