Keywords: mrtcal-user-manual

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## Overview

MRTCAL offers 2 main tasks:

- indexing the IMB-FITS files,
- calibrating the IMB-FITS files.

Indexing is done by creating a database of the IMB-FITS. This offers several advantages (e.g. opening the IMB-FITS - which is usually slow - is factorized once at indexing time) and flexibility (e.g. the user can select the desired subset of IMB-FITS files). The command to be used for this task is `INDEX` (see `HELP` for details), and the database is usually named index.mrt and saved together with the IMB-FITS files.

Calibration of the IMB-FITS files has 2 major modes: per file (command `CALIBRATE`), and for Current indeX (command `PIPELINE`). The pipeline mode is an automated way to calibrate each the files in the Current indeX, selecting the calibration scans, etc.

In addition, MRTCAL offers a collection of tuning options with the command `MSETUP`. For a first approach, you may be interested in the groups `MSETUP CALIBRATION` (i.e. tune the way the calibration is performed) and `MSETUP OUTPUT` (i.e. what results and how they are saved in the CLASS file). See dedicated HELP for exhaustive description.

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