- I. Physics Institute, University of Cologne, Zülpicher Str. 77, 50937 Cologne
- I. Physics Institute, University of Cologne, Zülpicher Str. 77, 50937 Cologne
- I. Physics Institute, University of Cologne Zülpicher Str. 77, 50937 Cologne
- I. Physics Institute, University of Cologne, Zülpicher Str. 77, 50937 Cologne
Astronomical data usually consists of the digital output signals from detectors, and various ancillary information, such as instrument status diagnostics and telescope pointing information. For the scientific analysis, the effects of the instrument and the atmosphere must be corrected, and the signal must be converted to physical units, such as brightness (the calibration process).
We are developing software to perform this process for the CCAT Heterodyne Array Instrument (CHAI), which is one of two instruments used for CCAT’s early science observations. Although a standard calibration procedure has been established with previous projects, the continuously increasing data size makes classical methods more challenging. It is important to develop this software using simulated data before actual observatory operations begin because different calibration methods may require modifications to observing procedures.