Changes between Version 8 and Version 9 of GPC_BrightStarAstrometry_Issue

Timestamp:

Apr 1, 2011, 5:41:23 PM (15 years ago)

Author:

watersc1

Comment:

--

GPC_BrightStarAstrometry_Issue

@@ -51 +51 @@
 
 The above figure shows cell00 and the full chip mosaic for OTA34 and OTA42 of o5407g0385o.  The full chip mosaic has the WCS overlaid.  I am ignoring DEC, and pretending that RA and x are parallel for simplicity. 
- * As shown above, OTA34 has RA_IPP - RA_2MASS < 0.  I've scribbled a red arrow on the chip mosaic frame illustrating the direction of this shift.  
+ * As shown above, OTA34 has RA_IPP - RA_2MASS < 0.  I've scribbled a red arrow on the chip mosaic frame illustrating the direction of this shift (from 2MASS to the GPC1 position).  
  * Due to the orientation of the OTAs, OTA42 has RA_IPP - RA_2MASS > 0.  I've scribbled a similar red arrow on that frame.  
  * Comparing to the raw cell00 frames, the shift arrows show that for both OTAs, the IPP measurement is closer to x = 0.