Part 1: Reference Frames -- Chapter 1: DGFI-TUM analysis and scale investigations of the latest terrestrial reference frame realizations -- Chapter 2: Impact of different ITRS realizations on VLBI combined EOP and Scale -- Chapter 3: Testing special relativity with geodetic VLBI -- Chapter 4: Development of wideband antennas -- Part 2: Static Gravity Field -- Chapter 5: Boundary complexity and …