Data taken with the GBT during the period
March 13th, 2023 @18:00 ET – May 25th, 2023
were not corrected properly for doppler tracking in the barycentric and LSR frames.
The main issue has been fixed. If you observed using the topocentric frame for your data (i.e. vframe=’topo’ in your configuration), then you do not need to be concerned about this issue.
However, for any other frame, data taken during that period have almost certainly been incorrectly adjusted for the motion of the Earth/Solar system.
UPDATE 2024-07-08: We have released a software fix that retroactively repairs the affected data.
Feel free to contact the helpdesk if you have any questions.