Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003assl..285...61g&link_type=abstract
Information Handling in Astronomy - Historical Vistas. Edited by André Heck, Strasbourg Astronomical Observatory, France. Astrop
Astronomy and Astrophysics
Astrophysics
Scientific paper
The IHAP system was conceived by Frank Middelburg around 1973 after he moved to the ESO Headquarters in Geneva from Chile where he had become a computer expert making several instrument control systems. It was implemented on HP 21 MX series computers for which it was highly optimized. IHAP used its own file system for image data and mainly assembler code for low-level routines while applications were written in FORTRAN. This gave it a very high performance considering computers at the time but made it difficult to port. It contained most of the features of a modern data processing system such as interactive and batch modes of operation, world coordinates for images, a table system and a device independent display manager. The system was employed extensively at La Silla for quick-look and on-line reduction. For off-line reduction, it offered a full set of reduction procedures for spectra and images. It was also exported to 15 major institutes in Europe. With the availability of cheap work-stations and powerful 32-bit mini-computers in the mid 1980's, it started to yield to MIDAS which had taken over many features and applications from IHAP.
Biereichel Peter
Grosbøl Preben
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