The technique is quite simple. Solve for Self-calibration using the wide bandwidth data as usual, and save the results (gain tables) using the magentaWRITE CGAINS command (eventually one for each of the PHASE or AMPLI steps of Self-calibration).
At any time, you can read back these gain tables using magentaREAD CGAINS, read an uv data set with magentaREAD UV and apply the gain solution using command magentaAPPLY. Since Self-calibration normally corrects for atmospheric errors, the derived `phase'' correction is in general here to compensate for a pathlength change, i.e. the corresponding phase correction should scale as Frequency. magentaAPPLY DELAY instructs [rgb]1,0,0IMAGER to take this effect into account.
Gildas manager
2023-06-01