TAO
Tools for Automated Observing
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Introduction
  System requirements
 
Getting Started
  Installation
  Modeling slew times
  Obtaining slew time
  data
  Modeling slew time
  data
  Preparing slew time
  models
  Measuring camera
  download times
  Specifying filter
  names and numbers
  Modeling the local
  horizon
  Creating user profiles
  Initializing target
  databases
  Customizing the
  scheduler
 
Daily Operation
  Starting observatory
  control software
  Updating target
  databases
  Generating a list of
  potential targets
  Preparing a list of
  observation requests
  Running the
  scheduler
  Starting scheduled
  observations
 
Image Acquisition with
the MU Script
  Customizing the
  script
  Starting MU
  Sequence of events
  during an observing
  run using MU
 
Timing Refinement
  Collecting timing
  data
  Analyzing timing
  data
  Adjusting the
  empirical timing
  correction
 
Other Tools
  Slew time
  measurement script
  Minor Planet Checker
  query script
  Regression program
 
Etc.
  Software updates
  License agreement
  Contact the author
Getting started



Step 2: Modeling slew times (continued)

Preparing files containing slew time models

You should now have a set of linear relationships which describe the relationships between slew time and angular displacement for the telescope right ascension and declination axes, and (if applicable) for the dome azimuth axis.

The coefficients of the linear relationships which describe telescope slew times should be entered in a data file (mount slew time model) with the following format:

! Example telescope slew time model
!
! August 19, 2004
!
! Slew time in right ascension (t_RA, in seconds) is given by 
! 
!     t_RA = A + B * dRA,
!
! where dRA is the angle (in degrees) through which the right ascension 
! axis must turn in order to perform the slew. Note that A and B may
! have different values in different ranges of dRA, and that dRA is
! always greater or equal to zero.
!
! Slew time in declination (t_dec, in seconds) is given by
!
!     t_dec = C + D * ddec,
!
! where ddec is the angle (in degrees) through which the declination
! axis must turn in order to perform the slew. C and D may have 
! different values in different ranges of ddec, and ddec is always
! greater or equal to zero.

dRA_min (deg)   dRA_max (deg)    A          B
20.             360.             18.768     0.8581
1.              20.              8.227      1.4541
0.              1.               3.893      6.36

ddec_min (deg)  ddec_max (deg)   C          D
14.             360.             14.523     0.6232
0.8             14.              7.691      1.0451
0.              0.8              3.159      5.27

In a slew time model file, comment lines start with "!" and are ignored; blank lines are also ignored.

Telescope and dome slew time models are usually saved to directory TAO\schedule. This sample mount slew time model (TAO\schedule\telescope.txt) may be used as a template for creating your own telescope slew time models. If you use more than one telescope, each one may have its own slew time model.

The coefficients of the linear relationships which describe dome slew times should be entered in a data file (dome slew time model) with the following format:

! Example dome slew time model
!
! August 19, 2004
!
! Dome slew time in azimuth (t_az, in seconds) is given by 
! 
!     t_az = A + B * daz,
!
! where daz is the angle (in degrees) through which the dome
! must turn in order to perform a slew. Note that A and B may
! have different values in different ranges of daz, and that daz is
! always greater or equal to zero.

daz_min (deg)   daz_max (deg)    A          B
8.              360.             6.5        0.473
0.              8.               2.5        0.68

This sample dome slew time model (TAO\schedule\dome.txt) may be used as a template for creating your own dome slew time models. If you use more than one automated dome, each one may have its own slew time model.

Previous: Modeling slew time data
Next: Measuring camera download times



© 1999-2004 Paulo Holvorcem