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Astronomical Data Analysis Software and Systems XIII ASP Conference Series, Vol. 314, 2004 F. Ochsenbein, M. Al len, and D. Egret, eds.

NEWFIRM Software--System Integration Using OPC
P. N. Daly NOAO, P. O. Box 26732, Tucson AZ 85726-6732, USA Abstract. The NOAO Extremely Wide-Field Infra-Red Mosaic (NEWFIRM) camera is being built to satisfy the survey science requirements on the KPNO Mayall and CTIO Blanco 4m telescopes in an era of 8m+ aperture telescopes. Rather than re-invent the wheel, the software system to control the instrument has taken existing software packages and re-used what is appropriate. The result is an end-to-end observation control system using technology components from DRAMA, ORAC, observing tools, GWC, existing in-house motor controllers and new developments like the MONSOON pixel server.

1.

Introduction

The NEWFIRM1 camera (Autry et al. 2003) will offer well-sampled coverage in J, H and Ks broadband filters of a 28 в28 field of view at Cassegrain focus of the NOAO 4-meter facilities. First commissioning will be on the Mayall telescope at KPNO in mid-2005, and on the CTIO Blanco soon thereafter. Present plans call for the instrument to carry out wide-field science in both hemispheres by alternating between sites. It is under development at NOAO-North in Tucson with significant involvement from the engineering and technical staff at NOAOSouth in La Serena. A schematic of the dewar design in the surrounding yoke and the on-sky footprint are shown in figure 1. 2. Discussion

In Survey Mode large scale programs intended for general public use will be carried out. This may involve tens to hundreds of square degrees of sky observations, many nights of observing time distributed over a lengthy period and public access to processed data. In this mode the instrument will operate in a pre-planned, systematic way with a minimum of real-time decision making during any particular night's observations. Filter and integration time changes are likely to be infrequent and a given region of sky the only nightly target. The telescope and instrument will function semi-automatically for periods of hours with monitoring and occasional intervention by the observer--who may not be a PhD level expert astronomer.
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http://www.noao.edu/ets/newfirm/

736 c Copyright 2004 Astronomical Society of the Pacific. All rights reserved.


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Figure 1.

NEWFIRM Design and Sky Coverage

In General Observer Mode an astronomer using the NEWFIRM instrument will conduct a limited program over a few nights with a specific immediate science goal. Various filters may be used, as well as a variety of integration times, on targets in any accessible part of the sky. All three--filter, integration time and telescope pointing--may be changed frequently. There may be extensive real-time decision making and intervention by an expert astronomer as the observations proceed. To meet these goals for NEWFIRM a software trade study2 was conducted which clearly identified the direction in which the pro ject should go: system integration using OPC3 . The key technologies identified are listed in table 1. Therefore, elements from several diverse software pro jects--such as DRAMA (Farrell et al. 1993), ORAC (Bridger et al. 2000) and GWC (Gillies 1995)-- were adopted as well as new developments such as MONSOON (Starr et al. 2003). The integrated design--now known as the NEWFIRM Observation Control System (NOCS)--is shown in figure 2 and an explanation of the modules and current status is given in the table 2. The design has two novel features. First, the NOCS never handles pixel data. Such data is served by the MONSOON image acquisition system directly to the data reduction pipeline with the NOHS task providing such meta-data as may be necessary to calibrate the data and/or provide FITS headers. Second, the observer interface is always the observing tool and, in so-called classic observing mode, the query tool will pick up the next observation sequence automatically from a queue.
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http://www.noao.edu/ets/newfirm/PDFs/SoftwareTradeStudy.pdf
Other People's Code.


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Table 1. NEWFIRM Software Key Technologies Technology GCC DRAMA GWC Tcl/tk Java Perl XML PostGreSQL Source
http://gcc.gnu.org/ http://www.aao.gov.au/drama http://www.noao.edu/wiyn/gwc_interface_documents.htm http://www.tcl.tk/ http://java.sun.com/ http://www.perl.com/ http://www.w3.org/XML/ http://www.postgresql.org/

Figure 2.

NEWFIRM Software Design


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Integrating these diverse software systems into a maintainable and configurable whole is the underlying challenge. Table 2. NEWFIRM Software Modules and Status Module NOOS NDGI NOHS NICS NMSL NOT NQT NXET NOMP Description Observation sequencer Telescope interface Meta-data repository Instrument controller MONSOON interface Observing tool Query tool Dictionary translator Observation management Support UKATC NOAO NOAO NOAO NOAO Gemini/JAC/NOAO JAC JAC/NOAO JAC Status Done In design Prototyped In design In design Done Done Done Done

Acknowledgments. PND is pleased to acknowledge the support of the NEWFIRM team: Marianne Abraham, John Andrew, Melissa Bowersock, Scott Bulau, Ruben Dominguez, Dan Eklund, Neil Gaughan, Derek Guenther, Ed Hileman, Ming Liang, Jerry Penegor, Ron Probst, Judy Sisson and Dave Rosin. References Autry, R. G., et al., 2003, Proc. SPIE, 4841, 525 Bridger, A., et al., 2000, Proc. SPIE, 4841, 227 Farrell, T. J., et al., 1993, BAAS, 25, 954 Gillies, K., 1995, NOAO Internal Report Starr, B. M., et al., 2003, Proc. SPIE, 4841, 600.