...

Introduction

This note explains organization and content of the calibration store, tools for maintenance and use of calibration parameters, and useful references to othe confluence documentsLCLS experiments use different type of detectors which produce raw data. Detectors are not perfect and in most cases these raw data can not directly be used in analysis. They need to be calibrated. Generic type of corrections for pixel geometry and intensity, such as dark rate (pedestals), common mode, mask, etc. need to be done in almost all experiments. These corrections use files with calibration parameters residing in calibration store.

Calibration store use regular file system to accumulate calibration files with a few simple rules about organization of the calibration store.

...

Advantage or this approach: clean, simple structure of the calibration store structure and files' content with sufficient flexibility for analysis of data. Although, it is not recommended, regular OS tools can be used to browse, modify, re-locate files.

This note explains organization and content of the calibration store, tools for maintenance,  application of corrections in psana, access in code to calibration parameters, and relevant references to other confluence documents.

Location

Directory containing calibration files is located at the same level as directories with data xtc or hdf5 files:

...