Keywords: imager-bugs

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## Known Bugs

This section contains the list of bugs known as of October 1, 2024.

- red Discovered 15-Nov-2022 magenta`UV_RESTORE` in Mosaic mode leads to subsequent crashes if the channel range is restricted by magenta`UV_MAP` because a single beam cannot be applied to all channels.
  This is often the case for ALMA data, because of the shift implied by the Doppler correction when creating the UVFITS files. A work around is to manually drop the edge channels by reading a coherent range of channels, and over-writing the UV data.

- [rgb]0.1,0.8,0.1 Corrected 08-Sep-2022 Bug correction in magenta`EXTRACT` command.
- [rgb]0.1,0.8,0.1 Corrected 29-Jun-2022 magenta`STOKES` command had incorrect derivation from H-V polarization
- [rgb]0.1,0.8,0.1 Corrected 09-Jun-2022 Debug magenta`UV_FLAG` command - Allow to use without Display.
- [rgb]0.1,0.8,0.1 Corrected 13-Apr-2022 magenta`MAP_COMBINE` and magenta`COMBINE` were not supporting big files.
- [rgb]0.1,0.8,0.1 Corrected 12-Apr-2022 magenta`UV_RESIDUAL` was not working on a non-sorted Mosaic data set. This could only happen by reading the Clean Component Table after reading the UV data, without any imaging step.
- [rgb]0.1,0.8,0.1 Corrected 09-Mar-2022 magenta`CCT_MERGE` Concatenation was improper
- [rgb]0.1,0.8,0.1 Corrected 07-Mar-2022 Beam size derivation was incorrect when an ANGLE was specified
- [rgb]0.1,0.8,0.1 Corrected 08-Feb-2022 magenta`UV_RESTORE` was not using fixed beam size.
- [rgb]0.1,0.8,0.1 Corrected 18-Jan-2022 `SINGLEDISH` data was incorrectly read, probably since 20-Sep-2021 (v1.53 of read.f90). Improper values were thus used by the magenta`UV_SHORT` command (red Discovered 17-Jan-2022 only).
- [rgb]0.1,0.8,0.1 Corrected 12-Jan-2022 Mosaic offsets were improperly computed by command magenta`UV_FIELDS` since 29-Jul-2021 (bug reported 10-Jan-2022). The script `@ fits_to_uvt` was thus leading to wrong pointing offsets.
- [rgb]0.1,0.8,0.1 Corrected 10-Jan-2022 A improper interaction between scripts was causing strange behaviour when switching between magenta`EXPLORE` and magenta`INSPECT_3D` commands.
- [rgb]0.1,0.8,0.1 Corrected 06-Jan-2022 The red SIC command `DEFINE IMAGE` failed on large FITS files. This prevented magenta`SHOW` and magenta`VIEW` to work directly from these files.
- [rgb]0.1,0.8,0.1 Corrected 18-Dec-2021 magenta`UV_TIME` produced incorrect results on tables with different weights per channel (e.g. those produced by magenta`UV_MERGE /MODE CONCATENATE`).
- [rgb]0.1,0.8,0.1 Corrected 13-Dec-2021 Remove occasional infinite loop in magenta`MAP_CONTINUUM` with method GAUSS (discovered 01-Dec-2021)
- [rgb]0.1,0.8,0.1 Corrected 18-Nov-2021 magenta`UV_REWEIGHT` syntax bug

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