Tutorials

Contents

Tutorials#

DRAN follows this practical flow:

  1. Read one FITS file or walk a directory of FITS files.

  2. Validate paths and skip known invalid, duplicate, empty, or broken-symlink files.

  3. Extract FITS headers from known HDU positions.

  4. Extract drift-scan arrays from known scan HDUs.

  5. Convert detector counts to Kelvin when noise-diode conversion factors are available.

  6. Derive weather and atmospheric fields from metadata.

  7. Fit single-beam or dual-beam drift scans.

  8. Apply pointing corrections where the required half-power scans exist.

  9. Store rows in a SQLite database, usually one table per source-frequency pair.

  10. Save plots under PLOTS/<SOURCE>/<FREQUENCY>/.

These tutorials use the FITS files included with the package under src/dran/data. The sample tree contains observations for a calibrator source HydraA and a target source J1427-4206 at frequencies 2280 MHz, 4800 MHz, 8280 MHz and 12218 MHz.

Tutorial#

  1. Calibrating S-band data

  2. Calibrating X-band data

  3. Calibration of Hydra A at s-band

Contents