1 Introduction

This page is part of the ING document INS-DAS-31 Design notes for UltraDAS

1.1 Purpose of this document

The internal construction of the programme udas_camera is described. The text will be of use to engineers planning to enhance or repair this programme. Engineers who need to minister to the system as a whole will get more benefit from document INS-DAS-23 Architecture for UltraDAS. Observers and other end-users are not advised to read this document.

1.2 Scope of the software

Udas_camera is the camera-server programme of UltraDAS; it is the software-component of the DAS sub-system. One copy of udas_camera runs continually in the DAS for each active camera in the system.

The principal duties of udas_camera are:

to programme and monitor the SDSU detector-controllers;
to allow client programmes to command the SDSU detector-controllers;
to capture and store pixels read out from the SDSU controllers;
to assemble and combine pixels after readout;
to store pixels and associated telemetry in FITS files;
to forward telemetry to the CIA.

1.3 References

User requirements for UltraDAS

Interfacing the DAS computer to SDSU detector-controllers
ING document INS-DAS-18 by Guy Rixon.
Co-ordinate systems for UltraDAS
ING document INS-DAS-19 by Guy Rixon.
Communicating regions of interest to SDSU controllers
ING document INS-DAS-20 By Guy Rixon.
Architecture for UltraDAS
ING document INS-DAS-23 by Guy Rixon.
Design patterns: elements of resusable object-oriented software

et al.