TY  - RPRT
TI  - Data assimilation of ground GPG total electron content into a physics-based ionosheric model by use of the Kalman filter
AU  - Hajj, G. A.
AU  - Wilson, B. D.
AU  - Wang, C.
AU  - Pi, X.
AU  - Rosen, I. G.
PY  - 2004
UR  - https://ntrs.nasa.gov/citations/20060040134
ID  - 20060040134
ER  -