The Data Handling System for the NOAO Mosaic

Doug Tody
NOAO

Session ID: T10.06   Type: oral

Abstract:

NOAO is building an 8K by 8K mosaic comprised of eight CCDs with up to sixteen readouts or subimages. This paper presents the data handling system being built for the NOAO Mosaic by the IRAF group at NOAO. This system consists of a data capture client which assembles and writes the disk images, a real time display and mosaic viewer used to view the very large (64 megapixel, 128 MB) Mosaic images during and after readout, and connections and extensions to IRAF for CCD processing, quick look, and general data interaction. The system architecture is based on a message bus with the external CCD controller process sending image header and data packets to the Mosaic data handling system (data capture client and real time display) during frame read out. The real time display and mosaic viewer is a general, user extensible image viewer based on the existing Ximtool and SAOtng display software from NOAO and SAO. Companion papers describe the Mosaic data format and data reductions. Like IRAF itself, all of this software is intended to be general enough for use by other observatories.





Patrick P. Murphy
Tue Sep 10 22:27:33 EDT 1996