A large quantity of metadata is stored within the nexus file (i15-1-#####.nxs) for each scan. This includes information such as scan time, ring current and detector integration time etc.
It can be viewed by following the steps below;
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| The nexus file has the same format as a .hdf5 file. h5py (https://www.h5py.org/) is a useful python package for interfacing with the .nxs files. |
Load the file into the "Data Files" pannel on the left hand side of the "DataVis" perspective. Select the file by clicking on the filename. |
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In the "File" option on the navigation bar, select "View Tree..." |  |
You can expand a given entry to view its value. | |
Similarly you can view the processing that has been applied to your 2D data to get to the integrated 1D data. This information is stored in the i15-1-#####-clusterProcessing#.nxs file. One of these files is generated for each detector. The entries from 0-9 under "process" contain the information, including values, for each processing step and the order in which they were applied. For more information on data processing in Dawn see /wiki/spaces/I151WEB/pages/1521320 | |
