Example of PV phase script translated from its IST phase structure

Header's information

// $Id$
// Missionphase  : PACS PV Phase
//
//
// Version       : 0.1
//
// Purpose       : Schedule the associated CUS procedure
//
// CUS author    : DAC
//
// Input arguments
// type    name         description
//
// Return values
// Type    Name        Description
//
// Description   : Set/resets OBSID, calls associated procedure
//
// Dependencies  : see associated procedure
//
// Preconditions : see associated procedure
//
// Comments      :
// 
// History       : 0.1 22-mar-2006
// History       : 0.1  11-feb-2008  Converted into Eng OBS by VDP
//

Declaration of script typre as observation (e.g. inc. a pointing request) and X-HSPOT readable variables

obs PacsEng_Spec_Gra_Diaghk_Setup {

/* No variables to call PacsEng_Spec_Gra_Diaghk_Setup                        */
    int diag_hk_period = 5; // 5 msec diag hk period 
/* string fltPOS = "POS A"; //Filter wheel position 0="POS A", 1="POS B" */
/* End of needed variables for PacsEng_Spec_Gra_Diaghk_Setup                     */
}

Internal variables declaration, and timing computation

{

// Four arguments needed for "no_pointing"
// 1. Execute the pointing request
  bool execute = true;
// 2. Initial hold
//    Write OBSID during initial hold
  int tih = duration(WriteOBSID($OBSID));
// 3. Final hold
//    Declare OBS finished during final hold
  int tfh = duration(WriteEndID());
// 4. Duration of "stable" pointing
  int tp = imax(1,duration(PACS_Spec_Gra_Diaghk_Setup(diag_hk_period)));

Pointing request: this is a PacsEng script so a no_pointing request is necessary, because the system expects a pointing request of some sort nontheless

// Issue PointReq
    int[] ts = no_pointing(execute,tih,tfh,tp);
}

State machine: even though there is no actual pointing, the observation made during the tests require the telescope to be "On SRC"