Changes between Version 2 and Version 3 of IPP_for_PS1/psvideophot

Timestamp:

Jun 28, 2011, 4:34:05 PM (15 years ago)

Author:

bills

Comment:

--

IPP_for_PS1/psvideophot

@@ -10 +10 @@
 It was pointed out that solar system objects might pass in front of a guide star and thus could be detected by a change in measured flux for the star.
 
-The IPP team has been requested to add a new analysis the suite of tools. 
+The IPP team has been requested to add a new stage to perform this analysis. The rest of this page discusses this project.
+
+Bill Sweeney has been prototyping a new program called psvideophot. This program contains some code provided by Pavlos Protopapas of CfA modified to operate on PS1 video cells in the IPP environment. 
+
+This program takes a GPC1 raw image file, finds the video cell, and examines the image cube frame by frame to measure the counts detected from the guide star in each frame. Certain parameters are printed to the stdout.
+
+Some work needs to be done to flesh out the analysis.
+
+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.
+
+Outputs in data base:
+ * flag was a guide star with signal above a specified signal to noise observed at all
+ * background count level
+ * nominal signal to noise of star
+ * 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)
+
+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
+ * 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.
+ * ippScript to gather then inputs and other parameters and pass them to psvideophot
+ * ippTask to manage processing in pantasks
+ * enhancements to the distribution system to support this new stage.
+