The article The Celestial Reference Frame at K Band: Imaging. I. The First 28 Epochs presents for those interested in AGN source structure and/or calibrator sources for VLBI at higher radio frequencies 5879 K-band (24 GHz) images of 731 ICRF sources at up to 28 epochs based on astrometric VLBA observations between 2015 to 2018 (DOI 10.3847/1538-3881/aca012) Read more.
