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After WFPC2 observations have executed, the image data pass through the OPUS pipeline, where they are processed and calibrated. All of the steps performed by the pipeline are recorded in the trailer file for each dataset. Figure 26.1 shows an example of a trailer file and identifies comments made during the following pipeline steps:
CECCCM-******************************************* OBSERVER COMMENTS FILE *****************************************************
CECCBN-*************************************************************************************************************************
OSS quality/utility report - Wide Field/Planetary Camera II (WFII)
Observation: Object name: Proposal ID: Executed (UT):
U28S0303 PSR1957+20 05390 94.242/ 21:57:17
Observation Specifics
---------------------
Science Data Mode: IMAGE
CCDs Used: ALL
Data Format: STDMODE
Pointing Control: FINELOK
Filter(s): F675W
Analog gain: 7.5 electrons/DN
Exp. time (sec): 600
Comments: This observation appears to have executed as planned.
OSS staff did not inspect the observation.
No terminator crossings occurred during this observation.
OSS_INFO1: OK - no apparent problems
OSS_INFO2: NO-MON - obs not monitored (lack of eng data and/or OSS staffing)
DPPBAN-***************************************************** TRAILER FILE *****************************************************
DPPSTA--------------------------------------------- DATA PARTITIONING STARTED ---------------------------------------------
DPPSTR-DATA PARTITIONING STARTED: 31-AUG-94 16:15:55 .
DPPOBS-Observation Identification: Program Number 28S , Observation Set Number 03 , Observation Number 03
DPPCAT-Msg Artifacts Catalog: DCF Msg 7 contained data for Info Set File with Root Name of U28S0303P
DPPIST-Missing pkts processing is complete, processed 3200 science pkts, detected 0 as missing
DPVWM1-Weighted Quality Measure of 0 was calc for errors reported in Quality & Acctg Capsule entries for Info Set
DPPNPR- 3201 packets expected, 3201 packets received ( 1 SHPs, 0 UDLs, 0 Bad pkts) for Info Set U28S0303P
DPPEND-DATA PARTITIONING ENDED: 31-AUG-94 16:23:06 .
DPPFIN--------------------------------------------- DATA PARTITIONING COMPLETED -------------------------------------------
CPE0ST-------------------------------------------- DATA EDITING STARTED -----------------------------------------------------
CPESTR-DATA EDITING STARTED 31-AUG-94 16:23:20 FOR U28S0303P.
DPE4PC- 0 fill source packets were inserted by PODPS.
DPE4DC-In U28S0303P, 0 source packets were found that contain fill data inserted by the ST DCF.
DPERSC-CP34SE: ...and 0 packets were found to have segments without Reed Solomon corrections
CPEEND-DATA EDITING ENDED 31-AUG-94 16:23:20 FOR U28S0303P.
CPE0EN--------------------------------------------- DATA EDITING COMPLETED -----------------------------------------------------
CPG0VS--------------------------------------------- DATA EVALUATION STARTED -----------------------------------------------
DPVSTR-DATA EVALUATION STARTED 31-AUG-94 16:23:39 FOR U28S0303P.
DPVEND-DATA EVALUATION ENDED 31-AUG-94 16:24:03 FOR U28S0303P.
DPVWM2-Weighted Quality Measure of 0 was calc for discrepancies between predicted & actual Flags & Indicators for Info Set
DPVOKK-Info Set quality was OK as Weighted Quality Measure of 0 did not exceed Quality Threshold of 9
CPG0VE--------------------------------------------- DATA EVALUATION COMPLETED ---------------------------------------------
CGAI00-
CGAI01---------------------------------WIDE FIELD AND PLANETARY CAMERA GENERIC CONVERSION BEGINNING-----------------------------
CGAI00-
CGAT01-Routine CGWFP2, version 34.4.A , will perform generic conversion
CGAT02-GENERIC CONVERSION BEGINNING: processing information set U28S0303P
CGAT03-CGWFP2 START: 31-AUG-94, 16:24:04
CGAW06-No error values detected in flags and indicators
CGAI06-SHP generic conversion has completed successfully
CGAC02-Generated new WFII reference file catalog : CCC:[SIS.WF2]U28S0303P.CTX
CGAI08-SCI generic conversion has completed successfully
CGAI22-DQM generic conversion has completed successfully
CGAT04-GENERIC CONVERSION TERMINATING: successful completion
CGAT09-CGWFP2 END: 31-AUG-94, 16:27:45
CPG0EN--------------------------------------------- GENERIC CONVERSION COMPLETED -----------------------------------------------
CCAI00-
CCAI07-CALIBRATION BEGINNING: processing information set 31-AUG-94
CGAI00-
CCAI07-CALIBRATION BEGINNING: processing information set U28S0303P
CCAI11-CCWFP2 START: 31-AUG-94, 16:33:17
CCAIRI- --- WF/PC-2 Calibration Starting: CALWP2 Version 1.3.0.6
CCAIRI- --- Starting CALWP2: Input = U28S0303P Output = ucal:u28s0303p
CCAIRI- --- Starting processing of element 1
CCAIRI- photmode = WFPC2,1,A2D7,F675W,,CAL
CCAIRI- --- Starting processing of element 2
CCAIRI- photmode = WFPC2,2,A2D7,F675W,,CAL
CCAIRI- --- Starting processing of element 3
CCAIRI- photmode = WFPC2,3,A2D7,F675W,,CAL
CCAIRI- --- Starting processing of element 4
CCAIRI- photmode = WFPC2,4,A2D7,F675W,,CAL
CCAIRI- --- Computing image statistics of element 1
CCAIRI- --- Computing image statistics of element 2
CCAIRI- --- Computing image statistics of element 3
CCAIRI- --- Computing image statistics of element 4
CCAIRI- --- WF/PC-2 Calibration Ending for observation
CCAI10-CALIBRATION END: 31-AUG-94, 16:38:30
The calibration software used by the pipeline is the same as that provided within STSDAS (calwp2). The calibration files and tables used are taken from the Calibration Data Base (CDBS) at STScI and are the most up-to-date calibration files available at the time of processing. All CDBS files are available to you through the HST Data Archive. (See Chapter 1).