Changeset 21444 for branches/eam_branch_20090208/Ohana/src/addstar/doc/notes.txt

Timestamp:

Feb 11, 2009, 6:39:57 PM (17 years ago)

Author:

eugene

Message:

working on the new PS1_V1 CMF and DVO formats; removing autocode type Stars; using Average and Measure in addstar to carry new detection info (replacing autocode Stars)

File:

• branches/eam_branch_20090208/Ohana/src/addstar/doc/notes.txt (modified) (1 diff)

branches/eam_branch_20090208/Ohana/src/addstar/doc/notes.txt

@@ +1 @@
+
+2009.02.11
+
+  updating DVO tables with more fields: cleaning up the conversions
+  from external formats to the DVO internal formats:  I am changing
+  the APIs to convert directly to the Measure structure, including
+  conversion functions for the compressed fields (ie, pixels carried
+  as short).
+
+  A few remaining issues:
+
+  * t_msec : I've added a field to carry the fractional seconds, but
+    nothing is yet setting this value, and the query functions do not
+    use this value.
+
+  * various fields are reported in either arcseconds or pixels (eg,
+    FWHMx, moments, error in centroid).  These are currently not very
+    consistent, and should be tightened up...
+
+    ** if we store these values in pixels, then cameras with a wide
+       range of plate scales (GPC1 << SkyProbe << AllSky) will all fit
+       in field with a small dynamic range; since we also provide the
+       plate scale (as a float), conversions are easy:
+       GPC1     : 0.26 arcsec / pixel
+       SkyProbe : 4.5 arcsec / pixel
+       AllSky   : 3600.0 arcsec / pixel 
 
 2008.10.11