Changeset 26228

Timestamp:

Nov 20, 2009, 3:24:29 PM (17 years ago)

Author:

eugene

Message:

add additional statistical measures to astrometry calibration

File:

• branches/eam_branches/20091113/psastro/src/psastroMosaicOneChip.c (modified) (2 diffs)

branches/eam_branches/20091113/psastro/src/psastroMosaicOneChip.c

@@ -124 +124 @@
     float plateScale = 0.5*(fpa->toSky->Xs + fpa->toSky->Ys)*3600.0*PM_DEG_RAD;
 
+    float rawXstdev = psStatsGetValue (results->xStats, psStatsStdevOption(results->xStats->options));
+    float rawYstdev = psStatsGetValue (results->yStats, psStatsStdevOption(results->yStats->options));
+
     // pixError is the average 1D scatter in pixels ('results' are in FPA units = microns)
-    float pixError = 0.5*(results->xStats->clippedStdev + results->yStats->clippedStdev) / pixelScale;
+    float pixError = 0.5*(rawXstdev + rawYstdev) / pixelScale;
 
     // astError is the average 1D scatter in arcsec ('results' are in FPA units = microns)
-    float astError = 0.5*(results->xStats->clippedStdev + results->yStats->clippedStdev) * plateScale;
+    float astError = 0.5*(rawXstdev + rawYstdev) * plateScale;
     int astNstar = results->yStats->clippedNvalues;
 
@@ -161 +164 @@
     psMetadataAddF32 (updates, PS_LIST_TAIL, "EQUINOX",  PS_META_REPLACE, "", 2000.0); // XXX this is bogus: should be defined based on equinox of refstars
 
+    // additional error measurements:
+    psMetadataAddF32 (updates, PS_LIST_TAIL, "AST_MDX",   PS_META_REPLACE, "mosaic astrometry X stdev (arcsec)", rawXstdev * plateScale);
+    psMetadataAddF32 (updates, PS_LIST_TAIL, "AST_MSX",   PS_META_REPLACE, "mosaic astrometry X systematic err (arcsec)", results->dXsys * plateScale);
+    psMetadataAddF32 (updates, PS_LIST_TAIL, "AST_MRX",   PS_META_REPLACE, "mosaic astrometry X 10-90 percentile (arcsec)", results->dXrange * plateScale);
+
+    psMetadataAddF32 (updates, PS_LIST_TAIL, "AST_MDY",   PS_META_REPLACE, "mosaic astrometry Y stdev (arcsec)", rawYstdev * plateScale);
+    psMetadataAddF32 (updates, PS_LIST_TAIL, "AST_MSY",   PS_META_REPLACE, "mosaic astrometry Y systematic err (arcsec)", results->dYsys * plateScale);
+    psMetadataAddF32 (updates, PS_LIST_TAIL, "AST_MRY",   PS_META_REPLACE, "mosaic astrometry Y 10-90 percentile (arcsec)", results->dYrange * plateScale);
+
     // determine fromFPA transformation and apply new transformation to raw & ref stars
     psastroUpdateChipToFPA (fpa, chip);