Engineering Data Processing System (EDPS) Reference Manual

Contents

• EDPS Overview
• EDPS Pipelines

EDPS Overview

    The STScI Engineering Data Processing System (EDPS) is the replacement for the STScI HST Observatory
    Monitoring System; i.e., the (OMS) system.  The EDPS produces the same output products as the OMS
    however the production of the products is accomplished in a much more database driven, user
    selectable way.  The EDPS is also designed such that future requests for additional telemetry
    derived products can be easily accomodated.  Also, whereas the OMS system was VMS based and relied heavily 
    on FORTRAN, the EDPS is UNIX based and is implemented using C, C++, JAVA, and scripts.  
    
    The primary function of the EDPS is to use observation information provided by the HST Planning and 
    Scheduling System (PASS) along with Engineering Telemetry data provided by the HST Control Center System
    (CCS) to generate the following products:   
    

      
Obslogs, i.e., JITTER files for each observation executed by HST
        - these files are used to determine the amount of jitter that occurred while a given
          observation was in progress.  The EDPS inserts these products into the HST archive.
      
Astrometry Files
        - these files are used to monitor the operation of the Fine Guidance Sensors (FGS) and to
          perform FGS related science.  The EDPS inserts these products into the HST archive.
      
Save Files and Breathing Files
        - these files are used by the STScI Engineering team to monitor the operation of various
          HST systems and subsystems.  The EDPS transfers these products to the STScI Engineering
  	  Team.  
      
FITS and ASCII format versions of PASS provided Orbital Ephemeris files
  
        - The EDPS inserts these products into the HST archive.
    
	
       
    In addition, the EDPS is used as a mechanism to archive the following products produced by and
    then received from the PASS system:
    
 
      
Mission Schedule files
      
Mission Timeline Report files
      
Science Mission Schedule files
      
Orbital Ephemeris files
      
PASS Auxiliary Data files
            
    
  
    The EDPS is composed of five individual  pipelines.  Each of the pipelines have specific responsibilities 
    and perform specific tasks to enable them to work in conjuction to produce the various output products.  
  

EDPS Pipelines

• PASS Data Receipt (PDR) Pipeline
• Engineering Data Receipt (EDR) Pipeline
• FOF Conversion (FOF) Pipeline
• Fine Guidance Sensor (FGS) Pipeline
• Astrometry (AST) Pipeline

   A pictorial view of the pipelines representing their interdependencies follows.  The vertical
   positioning indicates the order in which the pipelines should be run.  The vertical and diagonal
   lines indicate which pipelines provide input to which other pipelines.
      
           PDR Pipeline       EDR Pipeline
	       | | |                  |
	       | | |                  |
	       | |  \                /
	       | |   \              /
	       | |    \            /
               | |     \          /
               | |      \        /
               | |       \      /
               | |      FOF Pipeline   
	       | |        |       |   
               |  \       |       |
	       |   \	  |       |
               |    \     |       |
               |     FGS Pipeline |
               |          |       |
		\         |       |
		 \        |      /
                  \       |     /
		   AST  Pipeline