Obtaining accurate antenna positions are important in VLBI system, especially for high precision astrometry. Mizusawa antenna has been participating in international geodesy observations at S/X frequency bands and all VERA stations are measuring their relative positions by K-band geodetic VLBI observations internally.
In order to determine and maintain accurate positions of three KVN antennas, KVN and VERA started the K-band geodesy VLBI program in 2011.
|Obs. Code||Obs. Date||Antenna||Note|
|r11333k||2011 Nov. 29||Ky Ku Kt Vm Vr Vs Vo||only VERA+KVN Yonsei solution was obtained|
|r11361k||2011 Dec. 27||Ky Kt Vm Vr Vs Vo||observation was failed|
|r12271k||2012 Sep. 27||Ky Ku Kt Vm Vr Vs Vo||all solutions were obtained|
|r13088k||2013 Mar. 29||Ky Ku Kt Vm Vr Vs Vo||analysis in progress|
|r13140k||2013 May 20||Ky Ku Kt Vm Vr Vs Vo||data copy in progress|
The first KVN K-band geodesy VLBI was performed on Feb. 1, 2012. Total 85 ICRF sources were observed with 1 Gbps (256MHz bandwidth) data rate. The correlation has been done with DiFX software correlator and the data analysis is in progress.