Changes between Version 3 and Version 4 of IPP_for_PS1/psvideophot

Timestamp:

Jun 28, 2011, 4:41:47 PM (15 years ago)

Author:

bills

Comment:

--

IPP_for_PS1/psvideophot

@@ -18 +18 @@
 Some work needs to be done to flesh out the analysis.
 
-Inputs:
+'''Inputs:'''
  * Target exposure (the analysis operates on such a small number of pixels it should be possible to process all video cells for an exposure in one script.) However separate rows in the database should be used for the results. key: exp_id, class_id, cell_id.
+ * Astrometric solution for the exposure (The results of camRun for the exposure).
 
-Outputs in data base:
+'''Outputs in data base''':
  * flag was a guide star with signal above a specified signal to noise observed at all
  * background count level
@@ -27 +28 @@
  * first "good frame" It takes several frames (~30?) for the camera to center the star in the little video window
  * Flag indicating a "candidate transit event" was seen. (Perhaps SNR_max SNR_min instead)
+ * ra, decl for the guide star (should match the target as reported in the raw fits header)
 
-Output fits table
+'''Output fits table'''
  * one row for each frame containing the measurements made by psvideophot and certain parameters reported by the camera in the video extension table
  * The video cell and video extension extracted from the raw fits file. This file can be distributed outside IfA since magic is not required.
 
-Software Components
+'''Software Components'''
  * two new database tables
  * an ippTool to manage the contents of the new tables: Queuing runs: the selection parameters will probably be quite similar to chiptool. Target exposures will be selected by OBS_MODE, date, etc.
@@ -38 +40 @@
  * ippTask to manage processing in pantasks
  * enhancements to the distribution system to support this new stage.
- 
+ * refinements to psvideophot to be discussed in the next section
+
+ '''psvideophot'''
+ * Currently the program uses a hard coded aperture in "video cell coordinates". This needs to be variable based on the binning used by the camera. Currently columns are unbinned and rows are binned by 2. This is expected to change. The aperture might need to be variable based on seeing. We need recipe values for controlling this feature.
+ * The exposure time for each frame may vary based on what the camera system is doing. This needs to be taken into account.
+ * In the first several frames the guide star may not be centered in the cell. We need to detect when the camera is settled in. This information may be derived from the contents of the video extension. Similarly the last frame(s) of the exposure may be truncated and so they should be discarded from the analysis.