Changeset 20688

Timestamp:

Nov 11, 2008, 1:12:32 AM (17 years ago)

Author:

Sebastian Jester

Message:

Add comment on need to trap special flag values (-9999 for unmeasured
quantities, -1000 for unmeasured errors)

File:

• trunk/Ohana/src/addstar/src/ReadStarsSDSS.c (modified) (1 diff)

trunk/Ohana/src/addstar/src/ReadStarsSDSS.c

@@ -71 +71 @@
   NAMED_PHOTCODE_AND_ZP (photcode[3], zeropt[3], "I_SDSS");
   NAMED_PHOTCODE_AND_ZP (photcode[4], zeropt[4], "Z_SDSS");
+
+  // XXXYYYZZZ SDSS tables have special flags for undefined/unmeasured values and errors:
+  // -9999 flags unmeasured values, and the corresponding error may or may not be meaningful
+  // -1000 flags errors that are not determined, even though the corresponding quantity is.
+  // These special values need to be trapped here to avoid averaging meaningful numbers with the flag values.
 
   // various header values needed to calculate per-star data below