TY  - RPRT
TI  - On achieving sufficient dual station range accuracy for deep space navigation at zero declination
AU  - Siegel, H. L.
AU  - Christensen, C. S.
AU  - Green, D. W.
AU  - Winn, F. B.
PY  - 1977
UR  - https://ntrs.nasa.gov/citations/19780047989
ID  - 19780047989
ER  -