Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.atnf.csiro.au/observers/docs/tid_obs_guide/example_obsfile.txt Дата изменения: Mon Sep 8 06:35:20 2003 Дата индексирования: Sun Dec 23 11:00:26 2007 Кодировка: Поисковые слова: п п п п п п п п

# Example Observation file for Tidbinbilla service spectroscopy
# -------------------------------------------------------------
# Version 1.0: Jim Lovell 26-July-2002
# Version 1.1: Jim Lovell 8-Sep-2003
# Added comments on bandwidth (whoops!) and SCHED mode
#
# Comments may be entered by placing a "#" in the first column.
#
# Each line of the observe file defines a single observation. Normally the
# observing software optimises the order of observation according to source
# proximity and elevation but this can be overridden by adding a line at the
# top of the file with the word "SCHED" in upper case. This can be useful
# for mapping or for non-supported pointing modes.
#
# Description of fields:
#
# Obs Code = observation code (tnnnn)
#
# Src = source name (no spaces allowed!)
#
# RA (J2000) = RA and Dec in J2000 coords. Use colons to
# Dec(J2000) separate hrs, mins, secs and deg, min, sec
#
# Vel or z = heliocentric velocity (km/s) or redshift
#
# LSR, Helio or z? = "L" if it's LSR velocity, "H" for a heliocentric
# velocity and "Z" if it's a redshift.
#
# No IF = number of IFs (1 or 2, must be 1 if dual pol)
#
# No Pol = number of polarisations ("1" = DAS inputs 1 and 2 are X,
# "2" = DAS input 1 is X and 2 is Y)
#
# rest freq1 = Rest freq (MHz) in IF1
#
# rest freq2 = Rest freq (MHz) in IF2 (set to 0.0 if no 2nd IF)
#
# BW1 = bandwidth of IF1
#
# BW2 = bandwidth of IF2 (set to 0.0 if no 2nd IF)
#
# Time = Time needed ON SOURCE (min)
#
# Cor config = correlator config file
#
# No Avg = number of integrations to average before writing
#
# Pos switch = position switching
# where 0 = no position switching
# 4 = 4-point switching
# (+(RA_offset), on_src, on_src, -(RA_offset)
# 8 = 8-point switching
# (where (x,y) = (1,0), (0,0), (0,1), (0,0), (-1,0), (0,0), (0,-1), (0,0) * offset)
#
# Freq switch = frequency switching (0 = off, 1 = on)
#
# Pos offs = position offset in arcminutes for position switching
#
# Freq offs = (in MHz) if frequency switching, offsets will be at +/- this value. If
# Freq switch = 0, and Freq offs != 0 then a constant offset will be applied to all spectra.
#
# Pos time = (in min) Time spent at each position offset.
# Must be evenly divisible into time on source ("Time")
#
# Freq time = (in min) Time spent at each frequency offset.
# Must be evenly divisible into time on source ("Time")
#
# Dop track = Doppler tracking (0 = off, OP = on using optical definition,
# RA = on using radio definition,
# RE = on using relativistic velocity).
# Frequency is updated for every scan/freq-offset
#
# Status: todo = To do (observation not yet made)
# done = Observation complete
# part = Observations partially complete. May need further observation
#
# The remainder of the line is ignored but may be used for comments
#
# Obs Src RA (J2000) Dec (J2000) vel H,L No No rest rest BW1 BW2 Time Cor No Pos Freq Pos Freq Pos Freq Dop status
#Code or z or z IF Pol freq1 freq2 (MHz) (MHz) (min) config Avg switch switch offs offs time time track
#
t0000 G240.316 07:44:51.98 -24:07:42.0 63.0 L 2 1 1665.402 1667.359 2.0 2.0 20.0 das_xxxx_2_4096 12 4 0 10.0 0.1 10.0 0.0 RA todo
#
#
# The above describes an observation of a source with a LSR velocity
# of 63 km/s. IF1 will observe the 1665.402 OH transition and IF2
# will observe the 1667.359 OH transition. Both IFs will have
# bandwidths of 2 MHz and 4096 channels per band. A total of 20 min
# will be spent on source. Position switching will be used in mode 4
# with 10 arcmin offsets and 10 min spent at each position. Frequency
# switching will not be used but an offset of 0.1 MHz will be applied
# to avoid a birdie in the central channel. Doppler tracking is
# switched on and 12 integration cycles will be averaged together at a
# time.