LBA observations for project V515 semester 2023APRS

Full description

We request 72 hours at the LBA facilities including Parkes, Hobart26, Ceduna, Tid, AuScope, ATCA, Mopra
and Wark30M) for geodetic VLBI observations (single frequency mode in X-band) of 10 radio sources that
display large positional displacement (>10 mas) from one epoch to another or/and fast apparent motion for several
years. The physical mechanisms of the detected astrometric peculiarities seem to be different for all objects.
Therefore, these observations have high potential astrophysical relevance.
Recent technological achievement allows us to calibrate the ionosphere with global total electron content
(TEC) maps. Therefore, we could accommodate some of the LBA facilities that have never been used for geodetic
VLBI observations before or participated in the geodetic programs occasionally. This would help to tie the
positions of the non-geodetic facilities to the new International Terrestrial Reference Frame (ITRF2020).