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| public:user_software:documentation:ndppp [2020-05-28 18:52] – André Offringa | public:user_software:documentation:ndppp [2021-02-26 14:18] (current) – [DPPP] Tammo Jan Dijkema | ||
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| ===== DPPP ===== | ===== DPPP ===== | ||
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| + | ==== Important ==== | ||
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| + | A newer version of this documentation is available at https:// | ||
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| + | ==== Old documentation ==== | ||
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| DPPP (the Default Preprocessing Pipeline, previously NDPPP for New Preprocessing Pipeline) is the LOFAR data pipelined processing program. It can be used to do all kind of operations on the data in a pipelined way, so the data are read and written only once. | DPPP (the Default Preprocessing Pipeline, previously NDPPP for New Preprocessing Pipeline) is the LOFAR data pipelined processing program. It can be used to do all kind of operations on the data in a pipelined way, so the data are read and written only once. | ||
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| ==== SetBeam ==== | ==== SetBeam ==== | ||
| - | SetBeam is an expert option and should only be used in rare cases. It allows direct manipulation of the beam-keywords for a column in a measurement set. Normally, DP3 registers whether the visibilities in a column are corrected for a beam or not, and if so, in what direction the beam was corrected for. This avoids incorrect corrections / scaling by the beam. However, certain actions can change the scaling of the visibilities without that the beam keywords are changed, in particular when predicting (either with DP3 or with another tool). When predicting a single source and not applying the beam, the visibilities are ' | + | SetBeam is an expert option and should only be used in rare cases. It allows direct manipulation of the beam-keywords for a column in a measurement set. Normally, DP3 registers whether the visibilities in a column are corrected for a beam or not, and if so, in what direction the beam was corrected for. This avoids incorrect corrections / scaling by the beam. However, certain actions can change the scaling of the visibilities without that the beam keywords are changed, in particular when predicting (either with DP3 or with another tool). When predicting a single source and not applying the beam, the visibilities are ' |
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