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Bright / extended DIMM configuration
The simpler method is to make a map from all of the data at once using
dimmconfig_bright_extended.lis:
% makemap "$STARLINK_DIR/share/smurf/s8d20100216_00022_0002[23].sdf" Orion \
method=iterate config=^$STARLINK_DIR/share/smurf/dimmconfig_bright_extended.lis
The large-scale noise and negative bowling is compensated for using a
S/N-based zero mask during map-making. Everywhere the signal is below
this threshold (5-
by default), the map is set to zero for all
but the final iteration. The resulting map, and the location of the
iteratively-determined zero mask are shown in Fig.
.
Figure:
Top: Map using all of the same data as in
Fig.
, but processed simultaneously using a
single call to makemap with the specialized
dimmconfig_bright_extended.lis. Bottom: The
QUALITY component of the resulting map indicates (white) where the
map has been constrained to zero after all but the final
iteration. It is selected based on a S/N threshold.
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Next: Cheat sheet for checking data quality
Up: Extended Galactic Sources
Previous: Standard DIMM configuration + PICARD
The SMURF SCUBA-2 Data Reduction Cookbook
Starlink Cookbook 19
Edward Chapin, Jessica Dempsey, Tim Jenness, Douglas Scott, Holly Thomas & Remo Tilanus
3 August 2010
E-mail:ussc@star.rl.ac.uk
Copyright © 2009-2010 University of British Columbia \
Copyright © 2009-2010 Science \& Technology Facilities Council