TY  - RPRT
TI  - A two-level approach to VLBI terrestrial and celestial reference frames using both least-squares adjustment and Kalman filter algorithms
AU  - Wu, X.
AU  - Parker, J.
AU  - Heflin, M.
AU  - Chin, T.
AU  - Abbondanza, C.
AU  - Gross, R.
AU  - Bohm, J.
AU  - Krasna, H.
AU  - Soja, Benedikt
PY  - 2017
UR  - https://ntrs.nasa.gov/citations/20210005965
ID  - 20210005965
ER  -