Antenna 6 gain calibration varying with time
Posted: Mon Jul 10, 2023 4:59 pm
I have been taking observations with the 6D configuration. Following calibration, I am finding that for the phase calibrator, the baselines containing antenna 6 have an amplitude and phase that seems to vary with elevation over time. Meanwhile, all the other baselines are flat as expected. See the attached plot. The phase also seems to vary by up to 3-5 deg. This is happening for another phase calibrator I have been working with for a different target source too. Its only about a 2-3% amplitude variation so is this a significant problem?