TY  - RPRT
TI  - Quaternion normalization in additive EKF for spacecraft attitude determination
AU  - Bar-Itzhack, I. Y.
AU  - Deutschmann, J.
AU  - Markley, F. L.
PY  - 1991
UR  - https://ntrs.nasa.gov/citations/19910065046
ID  - 19910065046
ER  -