Data processing pipeline for Herschel HIFI

Context. The HIFI instrument on the Herschel Space Observatory performed over 9100 astronomical observations, almost 900 of which were calibration observations in the course of the nearly four-year Herschel mission. The data from each observation had to be converted from raw telemetry into calibrated products and were included in the Herschel Science Archive. Aims. The HIFI pipeline was designed to provide robust conversion from raw telemetry into calibrated data throughout all phases of the HIFI missions. Pre-launch laboratory testing was supported as were routine mission operations. Methods. A modular software design allowed components to be easily added, removed, amended and/or extended as the understanding of the HIFI data developed during and after mission operations. Results. The HIFI pipeline processed data from all HIFI observing modes within the Herschel automated processing environment as well as within an interactive environment. The same software can be used by the general astronomical community to reprocess any standard HIFI observation. The pipeline also recorded the consistency of processing results and provided automated quality reports. Many pipeline modules were in use since the HIFI pre-launch instrument level testing. Conclusions. Processing in steps facilitated data analysis to discover and address instrument artefacts and uncertainties. The availability of the same pipeline components from pre-launch throughout the mission made for well-understood, tested, and stable processing. A smooth transition from one phase to the next significantly enhanced processing reliability and robustness.

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Packlib, an interactive environment to develop modular software for data processing

Lecture Notes in Computer Science - From Natural to Artificial Neural Computation ◽

10.1007/3-540-59497-3_237 ◽

1995 ◽

pp. 673-682 ◽

Cited By ~ 3

Author(s):

Yves Cheneval

Keyword(s):

Data Processing ◽

Modular Software ◽

Interactive Environment

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Convergent-beam thickness determination: The advantages of digital imaging

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100169833 ◽

1994 ◽

Vol 52 ◽

pp. 420-421

Author(s):

Stuart McKernan ◽

C. Barry Carter

Keyword(s):

Intensity Variation ◽

Convergent Beam Electron Diffraction ◽

Digital Data ◽

Thickness Determination ◽

Frequent Use ◽

Automated Processing ◽

Beam Thickness ◽

Convergent Beam ◽

Remarkable Agreement

Convergent-beam electron diffraction (CBED) patterns contain an immense amount of information relating to the structure of the material from which they are obtained. The analysis of these patterns has progressed to the point that under appropriate, well specified conditions, the intensity variation within the CBED discs may be understood in a quantitative sense. Rossouw et al for example, have produced numerical simulations of zone-axis CBED patterns which show remarkable agreement with experimental patterns. Spence and co-workers have obtained the structure factor parameters for lowindex reflections using the intensity variation in 2-beam CBED patterns. Both of these examples involve the use of digital data. Perhaps the most frequent use for quantitative CBED analysis is the thickness determination described by Kelly et al. This analysis has been implemented in a variety of different ways; from real-time, in-situ analysis using the microscope controls, to measurements of photographic prints with a ruler, to automated processing of digitally acquired images. The potential advantages of this latter process will be presented.

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Towards information coordination and reduced team size in space flight mission operations

PsycEXTRA Dataset ◽

10.1037/e578352012-021 ◽

2009 ◽

Author(s):

Jeffrey D. Onken ◽

Barrett S. Caldwell

Keyword(s):

Space Flight ◽

Team Size ◽

Mission Operations

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Speculations on the Construction of an Interactive Environment to Assess Sexual Interest and Coping Skills in Sexual Offenders

PsycEXTRA Dataset ◽

10.1037/e695432011-087 ◽

2006 ◽

Author(s):

D. Richard Laws ◽

Carmen L.Z. Gress

Keyword(s):

Sexual Offenders ◽

Coping Skills ◽

Sexual Interest ◽

Interactive Environment ◽

And Coping

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Design and Testing of an Experimental IPv4-to-IPv6 Transition Network

Scientific Research Journal ◽

10.24191/srj.v3i1.9337 ◽

2006 ◽

Vol 3 (1) ◽

pp. 27

Author(s):

Mustaffa Samad

Keyword(s):

Transition Period ◽

Internet Protocol ◽

Smooth Transition ◽

Internet Users ◽

Ipv6 Transition ◽

Information And Communication ◽

Ipv6 Networks ◽

And Migration ◽

Set Up ◽

Design And Testing

The Internet has been an integral part of the Information and Communication Technology (ICT) community in recent years. New internet users have been growing steadily over the years. This has lead to the depletion of new Internet Protocol (IP) addresses worldwide. To overcome this predicament, the new Internet Protocol version 6 (IPv6) had been introduced. The existing Internet Protocol version 4 (IPv4) is expected to be eventually replaced by this IPv6. The changeover from IPv4 to IPv6 is expected to be implemented progressively. During this transition period, these two protocols are expected to coexist for a number of years. IPv4-to-IPv6 transition tools have been designed to facilitate a smooth transition from IPv4 to IPv6. The two most basic IPv4-to-IPv6 transition tools available are the hybrid stack mechanism and tunneling. Tunneling is the encapsulation of IPv6 traffic within IPv4 packets so they can be sent over an IPv4 infrastructure. This project was initiated to set up an experimental IPv6 testbed, in order to study the performance as well as transition and migration issues of IPv6 networks under controlled conditions. This paper looks at how tunneling can be performed over existing internetwork infrastructure at Fakulti Kejuruteraan Elektrik (FKE), UiTM.

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