Difference between revisions of "STIX data center"

From stix
Jump to: navigation, search
(Flare identification)
Line 21: Line 21:
  
 
===  Flare  identification ===
 
===  Flare  identification ===
 
+
4-10 keV quick-look light curves are used for flare identification.  
4 to 10 keV quick-look light curves are used to identified flares.  
 
 
Identifications of flares consists of several steps as follows:
 
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;
+
* Light curve smoothing. 4-sec time bins  are  rebinned to 1 minute  
* Background estimation.  The light curves acquired during sun quiet periods  are used for background estimation.  
+
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.  
 
*  
 
*  
  

Revision as of 12:16, 6 July 2021

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:

Error creating thumbnail: File missing

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

3 Key Algorithms

3.1 Offline flare location solution

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:

5 Developers