TY  - RPRT
TI  - Helicopter Airborne Laser Positioning System (HALPS)
AU  - Eppel, Joseph C.
AU  - Cross, Jeffrey
AU  - Totah, Joseph
AU  - Christiansen, Howard
PY  - 1990
UR  - https://ntrs.nasa.gov/citations/19910065838
ID  - 19910065838
ER  -