Autoguider User manual
Release 4.3 Document issue 3.0
Author : A B Gentles 20 Feb 1995
This document is intended for all users of the WHT autoguider system. The
document is split into two parts. The first part is intended for Telescope
Operators who wish to use the Autoguider during normal observing. The second
part, the Command reference is intended for engineers and programmers who wish
to use the autoguider from the Utility network interface, in a non standard
way, or to develop the software.
The manual gives a description of the Autoguider system, and the VME software
which is used to guide the telescope. Examples of the standard ways of using
the autoguider are given.
This manual does NOT give any ICL command names. Although the normal usage
for the Autoguider should be via an ICL session, only a few of the ICL commands
pertaining to the autoguider have been implemented, and the rest have not yet
been defined. Operation of the autoguider via ICL should be done with
reference to WHT-AUTO-3, the user manual for the autoguider D-task.
The document is divided up into the following chapters:-
- Overview A brief description of the software
and how it is normally used.
- TCS interface Details of the hardware connection to the TCS and the protocol used.
- Hardware A description of the boards in the VME system and how to connect it to the rest of the system.
- Focal Station Configurations.
How to set the autoguider system up for use at different focal stations.
- Acquisition & Guiding. How to set the autoguider
Reading out fields from the CCD and finding guide stars. How to start and
- The Cassegrain Autoguider
Operation of the system at Cassegrain.
- The UES Autoguider
Operation of the system at UES.
- The Prime focus Autoguider.
Operation of the system at Prime Focus.
- The AutoFib Autoguider
Operation of the system at AutoFib.
A description of the centroiding algorithm used.
- How to Do it...Those commands available
for normal use at the engineering terminal or via the Utility Network.
- Command Reference A page with links to the pages for each individual commands.
- transferring images to the sun How to save images on the
Autoguiders hard disk and transfer them to somewhere more useful.
- Under the Bonnet. Details of the sofware.
You may find the following conventional documents useful.
WHT-AUTO-1 Autoguider Network Interface Specification
WHT-AUTO-3 WHT Autoguider: D-task user-guide
"CCD guidance system for the William Herschel Telescope" D J Thorne et al,
SPIE Vol1235 pp400-412
WHT-CCD-1 CCD Controller User Manual
ADC Analogue to Digital Converter
AF2 AutoFib II instrument ( mounted at Prime focus )
CASS Cassegrain focal station
CCD Charge Coupled Device
CCDC CCD Controller
DMS Detector Memory System
ICL Instrument Control Language ( on the system computer )
PRIME Prime focus focal station
RGO Royal Greenwich Observatory
TCS Telescope Control system
UES Utrecht Echelle Spectrograph, mounted at one of the Nasmyth
Table 1. Abbreviations
Throughout this document, the following conventions have been adopted:
All Autoguider commands issued from the Engineering terminal are shown in
Upright Helvetica font, for example: 1 AGSTAR
All Utility Network commands will be shown in courier font , for example
All output from the Autoguider will be shown in courier font , for
Guide star at border of CCD !
Operational problems should be reported using the usual LPO reporting procedure
i.e. in the defect data base, which will can be accessed from RGO. Once you
have entered your fault in the database, please mail a copy to me at
firstname.lastname@example.org, from the print menu. Stuart Barker is the current
Autoguider Support specialist on site, and Jonathan Burch covers the system
computer side of the autoguiders' interactions.