KaVA consists of 7 antenna sites in VERA-Mizusawa, VERA-Iriki, VERA-Ogasawara, VERA-Ishigakijima, KVN-Yonsei, KVN-Ulsan and KVN-Tamna with 21 baselines (see Figure ). The maximum baseline length is 2270 km between Mizusawa and Ishigakijima, and the minimum baseline length is 305 km between Yonsei and Ulsan. The maximum angular resolution expected from the baseline length is about 1.2 mas for K band and about 0.6 mas for Q band. The geographic locations and coordinate of each KaVA antenna in the coordinate system of epoch 2009.0 are summarized in Table . The geographic locations and coordinate of each KaVA antenna are summarized in Table . Figure shows examples of uv plane coverage.
The averaged velocities of VERA sites in Table are predicted value at the epoch of January 01, 2015. Reference frame of these coordinates is ITRF2008. The rates of the coordinates of Mizusawa, Iriki, Ogasawara and Ishigakijima are the average value of change of the coordinates from January 01, 2014 to December 31, 2014. The 2011 off the Pacific coast of Tohoku Earthquake (Mj=9.0) brought the co-seismic large step and non-linear post-seismic movement to the coordinates of Mizusawa. Co-seismic steps of the coordinates of Mizusawa are dX=-2.0297m, dY=-1.4111m and dZ=-1.0758m. The creeping continues still now, though decreased. The changes of coordinates by the post-seismic creeping are dX=-0.8574m, dY=-0.5387m and dZ=-0.2398m in total from March, 12, 2011 to Jan, 01, 2015.
|Site||[ ]||[ ]||[m]||[m]||[m]||[m]|
|Mizusawa||141 07 57.3||39 08 00.7||116.4||-3857244.6475||3108782.9982||4003899.2132|
|Iriki||130 26 23.6||31 44 52.4||573.6||-3521719.8292||4132174.6212||3336994.1399|
|Ogasawara||142 12 59.8||27 05 30.5||273.1||-4491068.5584||3481545.0777||2887399.7419|
|Ishigakijima||124 10 15.6||24 24 43.8||65.1||-3263995.1630||4808056.3180||2619948.7989|
|Yonsei||126 56 27.4||37 33 54.9||139||-3042280.9137||4045902.7164||3867374.3544|
|Ulsan||129 14 59.3||35 32 44.2||170||-3287268.6186||4023450.1799||3687380.0198|
|Tamna||126 27 34.4||33 17 20.9||452||-3171731.5580||4292678.4878||3481038.7252|
|The epoch of the coordinates of VERA is January, 01, 2015.|
|The KVN antenna positions are obtained by the KaVA K-band geodesy program on January 24, 2014.|
|Site||IVS2||IVS8||CDP||X [m/yr]||Y [m/yr]||Z [m/yr]|
|IVS 2-characters code|
|IVS 8-characters code|
|CDP (NASA Crustal Dynamics Project) code|
|The epoch of the coordinates is January 01, 2015. Average speed was obtained|
|from the VLBI data from January 01, 2014 to June 10, 2016.|
In the case of KVN, all antenna locations are measured with GPS system.
The antenna positions of KVN are regularly monitored both with GPS system and geodetic VLBI observations in collaboration with VERA.
No velocity information is available for KVN stations.