STIX data center

This page is still under construction.

STIX data center is a virtual server hosted at FHNW.

1 STIX Data Center tasks

Its tasks include

• Process STIX raw data & produce high level data products
• Monitor Data quality and instrument health status
• Provide data products and data browsing tools for the Solar Physics Community
• Support STIX operations
• Data archiving

2 STIX data center architecture

The data flow at STIX data center is shown in the picture below:

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Data processing SW mainly written in python. NoSQL DB (MongoDB) used to stored telemetry packets, file metadata and configurations

3 Key Algorithms

3.2 Flare identification

4-10 keV quick-look light curves are used for flare identification. Identifications of flares consists of several steps as follows:

• Light curve smoothing. 4-sec time bins are rebinned to 1 minute

time bins in order to filter spikes from the electronics and fluctuation due to statistics and the on-board integer compression;

• Background estimation. The light curves acquired during sun quiet periods are selected for background estimation.

The smoothed light curves have time bins of 1 minute. Those during the quiet period of the sun. to calculate the background Quick-look light curves are used for flare identification.

Then the smoothed light curves are used to search for peaks. A flare is considered being detected if a peak satisfies several conditions as follows:

• The peak counts is above 2 sigma of the background.

4 Source code

The source code can be found at:

• Data processing pipeline: https://github.com/i4Ds/STIX_python_PUB023
• STIX data center web applications: https://github.com/i4Ds/STIX-data-center

5 Developers

• Data processing software & data processing pipeline developers
  • Hualin Xiao
  • Shane Maloney

• Data center
  • Hualin Xiao