(:source 
  :version  3 
  :ip-name "stsci.edu"
  :tcp-port 210
  :database-name "/var/spool/uucppublic/.waisindex/hst-weekly-timeline"
  :cost 0.00 
  :cost-unit :free 
  :maintainer "reppert@stsci.edu"
  :description "

Weekly Timeline files for current year's Hubble Space Telescope ( HST ) observations.

timeline_* files in observer/weekly_timeline directory on STEIS.

1.0  INTRODUCTION

Available in the weekly_timeline sub-directory is the Preliminary HST 
Observing Reports.
The report is used to provide insight on upcoming HST activities and 
is run in two stages.  The Preliminary HST Observing Report is generated
approximately 1 month prior to the actual execution of the observation.  The
times used in the Preliminary report are the scheduling unit (SU) times. 
Observations belonging to the same SU will have the same SU begin and end
times.  Each observation in the SU will have a separate entry in the report. 

2.0  FTP SUB-DIRECTORY AND FILE NAME DESCRIPTIONS

The FTP directory/sub-directory/file structure for the Timeline Observing
Reports is depicted below: 

			FTP STSCI
			   |
			Observer
			   |
		     weekly_timeline
			   |
		    timeline_dd_mm_yy
			   .
			   .
			   .

    where: timeline_dd_mm_yy =   
				 dd  => day
				 mm => month
				 yy => year 

A file will be created for each time range covered by the available science
schedules.  After completion of the early OV activities, we expect the timeline
reports to cover a one week time period.  Partial timelines may still be
generated which cover less than one week, due to replans or patch schedules.
The duration of the report is identified in \"l\" from the report name, as
described above. 

The weekly.timeline sub-directory will normally contain only 1 report for each
\"week\".

The timeline reports will remain on FTP until all observation sets have been 
accounted for as completed or missed.  When the accounting is complete, a
report will entered in the following FTP sub-directory.

	/observer/completed_observations 

3.0  REPORT FIELD DESCRIPTIONS

Scheduling Unit
Begin UT		Earliest start time in YYYY DOY HH:MM:SS for this SU.
End UT			Latest end time in HH:MM:SS for this SU.

SU ID			Scheduling Unit Identifier => pppppss:vv

			where:  ppppp = proposal ID
				ss = SU number for that proposal
				vv = version number of the SU

Principal Investigator	1st 10 characters of PI last name

ELOG#			Source Prop Logsheet line # for this observation 

Target			1st 10 characters of target name

Science Instrument	Main SI used by this observation

Mode			SI Operating Mode used by this observation

R/T			Identifies real-time observations.

			blank =>  no real-time has been requested
			R => return link requested (downlink)
			F => forward link requested (uplink)
			B => both return and forward links requested

Apertures		Aperture(s) (up to 4) associated with this
			observation 

Spectral Elements	Filters/gratings (up to 4) associated with this 
			observation

Tape Recorder		Designates whether tape recorder data collection
			is associated with this observation.

			blank => no recording
			Y => tape recorder used for data collection
			B => tape recorder used in backup mode for data 
			     collection.  Typically seen with R/T field set
			     to R or B.

Obset ID		Observation Set ID
			(An obset is generally one or more alignments that can 
			 use the same Pointing Control System (Coarse Track 
			 or Fine Lock) mode and Guide Stars)

Alignment ID		Alignment ID
			(An alignment is generally one or more exposures, done 
			 back to back, with the same S/C pointing)

Exposure ID		Exposure ID
			(An exposure is the smallest unit output from 
			 the transformation process.)



"
  )
