Flight Tests of the Microwave Landing System Multimode Digital Processor

Details

• Creators:
  Warren, John
• Corporate Creators:
  Federal Aviation Administration Technical Center (U.S.)
• Subject/TRT Terms:
  • Microwave landing systems
  • Landing aids
  • Image fields in optical scanning
  • Digital communication systems
  • Data processing equipment
  • CALSPAN Processor
• Publication/ Report Number:
  FAA-CT-80-19
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Edition:
  Final Report
• Corporate Publisher:
  United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center
• Abstract:
  Flight tests were performed to order to evaluate four digital airborne processing techniques. Four techniques used for processing Microwave Landing System (MLS) time reference scanning beam (TRSB) signals are: (1) dwell-gate processing (DGP), (2) single-edge processing (SEP), (3) dual-edge processing (DEP), and (4) split gate processing (SPGT). These techniques were flight tested under standard partial orbits, glide slopes, and aircraft shadowing. Overall, the SPGT and DGP techniques resulted to about the same errors. The SEP data were noisier than the DGP but usually had about the same bias. The DEP technique was always inferior to the DGP. Aircraft shadowing errors were excessive for all techniques and should be avoided by operating procedures when an aircraft nears the touchdown region. It is recommended that the DEP algorithm be changed for improved no1.se performance and flight tests be performed using all four processing techniques in a specular multipath environment and under conditions using two azimuth antennas having different beam widths (these tests were not performed because of equipment nonavailability during flight testing).
• Format:
  PDF
• Funding:
  075-725-420
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/90486/dot_90486_DS1.pdf
• File Type:
  [PDF - 1.61 MB]
• Collection(s):
  FAA William J. Hughes Technical Center for Advanced Aerospace
• Main Document Checksum:
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