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tacos

Section: User Commands (1)
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NAME

tacos - Dynamic scheduling program.  

PERSON RESPONSIBLE

mchw  

CATEGORIES

misc  

DESCRIPTION

TACOS is a scheduling program to sort a prioritized list into an observing schedule using an atmopheric model or phase monitor data to estimate the atmospheric fluctuations.  

PARAMETERS

in
Input prioritized list. No default. The format is telescope dependent. For Hatcreek the format is:
   project, ra[hhmm], dec[dddmm], atmax[millimeter], lstmax
   Format: project*33,2i2,1x,i3,i2,3x,f4.2
   column(64)=lstmax
                Use HA max and min from input list.
Lines begining with `#' are not used.

(1/10 wave at 3mm wavelength) is a reasonable threshold without Selfcal. Larger values can be used with Selfcal. Smaller than 0.1 mm corresponds to very good seeing at Hatcreek.

For each project, 'lstmax' specifies the maximum number of repeats for each hour of lst. The default is 1 repeat. the HA range wanted. To sample the complete HA range, the integral of 'lstmax' over the available HA range should equal the maxtime.

The UT range can also be specified explicitly. Keywords specify some parameters which could be given for each project, and vice-versa.

telescop
name of telescope. Default=HATCREEK. Get telescope parameters, such as 'latitude'.
elevlim
Elevation limit. Default=10 degrees, zero wait time. Time to wait for the source to rise can be changed by setting elevlim below the actual elevation limit for the observation.
maxtime
maximum scheduled time for each project. Default = 8 hours.
mintime
Minimum interval for which a project can be scheduled. (or 80% of time above elevlim, whichever is smaller) Default = 1 hour.
interval
LST scheduling interval used to re-evaluate schedule. Default = 2 hours.
wait
Interval to wait before re-evaluating schedule when no project can be scheduled. Default=0.1 hours.
lst
Starting LST in hours, given as a real number. e.g. 12.3.
stop
LST stop time for schedule, given as a real number which can be larger than 24.0 to represent more than one day. Default = lst + interval, i.e. only one project will be scheduled. If stop is greater than lst + interval then TACOS advances the LST and schedules the next project.
phfile
Filename of phase monitor data used to estimate seeing. The atmospheric phase rms is measured in a 5 min average on a 100 m baseline. The default file is '$MIRCAT/ovro_phase.1996'.
phday
Starting time in phfile - decimal days since 01JAN Used to estimate seeing. Default uses atmos model instead. The unix command phday=`date '+%j'` sets the current day number.
phfac
Phase factor used to multiply value in phfile to get path rms in millimeters. e.g. 12 GHz phase monitor needs phfac = 300/12/360 = 0.069 Default=1.0.
atmos
Three values giving the mean and rms atmospheric fluctuations in millimeters, and the atmospheric time constant in hours. Default=0,0,1 i.e. perfect weather. atmos=.3,.1,0.05 is reasonable. Typical values range from .1,.1,4 in good weather to 2,2,0.01 in bad.
log
Output log file of the observing schedule. Default is the terminal.
statin
Input filename containing the status of the observations. TACOS keeps track of the integration time and HA range aquired for each project. This status can be read in as a starting point for observations, and/or written out as a record of the current status. Lines begining with `#' are not used. Default: no files are read or written.
statout
Output filename containing the status of the observations. This file is updated after each observation scheduled.
options
Extra processing options. Possible values are:
  debug    Print more output to monitor scheduled observations,
  stat     Print contiguous run time statistics.
  histo    Print histogram for atmospheric phase,
                 and run time statistics..


 

Index

NAME
PERSON RESPONSIBLE
CATEGORIES
DESCRIPTION
PARAMETERS

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Time: 18:35:38 GMT, July 05, 2011