Integrated GPS/Loran Navigation Sensor for Aviation Applications by James H. Doty, David A. Anderson and Patrick Y. Hwang, Ph.D., Rockwell Collins, Inc., Linn Roth, Ph.D., Locus, Inc.
Integrated GPS/Loran Navigation Sensor for Aviation Applicationsby James H. Doty, David A. Anderson and Patrick Y. Hwang, Ph.D., Rockwell Collins, Inc., Linn Roth, Ph.D., Locus, Inc.
Portions of this work are being performed under subcontract SK-00-18 between Locus, Inc. and Advanced Management Technology, Inc. (AMTI) and under subcontract SK-02-02-001-00 between Rockwell Collins, Inc. and AMTI under a Federal Aviation Administration (FAA) Broad Information Technology Services (BITS) contract.
Resurging Interest in Loran
GPS/Loran Integration Program
Standard SatMate 1020Loran Receiver
H-Field Loran Antenna
GPS/Loran Antenna Development
GPS/Loran Integration Effort
GPS Antenna Requirements
Breadboard GPS/Loran Test Pallet
Brassboard MMR Architecture
Flight Test Antenna Locations
ASF values for strong stations show good continuity and stability
North/South offset reduced from 150 m to <10 m
Calibrate Loran when GPS is good
Use Loran when GPS is bad
Ten hours of flight testing were performed on the Rockwell Collins Sabre 50 using:
GPS-Loran Antenna inside radome
Multi-Mode Receiver (MMR)
Coasting IMU has diverging solution
IMU-Loran has accuracy and low noise
Loran-only has large bias
ASF-corrected Loran is accurate but noisy