733667-001-023-0002
AI Summary
The document discusses the phenomenon of uncorrelated radar signals, explaining the differences between primary and secondary radar returns and their implications for radar tracking of aircraft.
Key Findings
- Uncorrelated primary and beacon returns occur when radar signals do not match in timing or location. - Primary radar signals are sent towards aircraft, while secondary signals come from transponders. - The document includes a diagram illustrating correlated and uncorrelated radar returns.
OCR Text
UNCORRELATED RADAR SIGNALS An "uncorrelated primary and beacon(secondary) return on a radar screen occurs when the radar energy that is sent up toward the aircraft (primary signal) returns off the surface of the aircraft at a slightly different moment than the beacon (secondary) transponder Signal and the two do not match up as being at the same place or same computer radar cell. —_—_ --RADAR COMPUTER CELL, 1/4 MILE-- 12] < I s A> NS iz “a fA SECONDARY RADAR a RETURN 3 (Beacon) ! (Transponder) Drawing by Paul Steucke March 5, 1987 | y— RADAR CELL SAME AIRCRAFT \ > FL: ing py (Crossing Cell) SN Vy / PRIMARY RADAR RETURN (Skin- Surface) S : =PRIMARY RADAR RETURN =SECONDARY RADAR RETURN =CORRELATED RETURN (Combined Return) =UNCORRELATED RETURN
Metadata
- Agency
- —
- Classification
- UNCLASSIFIED
- Department
- National Archives and Records Administration
- Catalog source
- View NARA catalog record
NARA Source
- NAID
- 733667
- File
- 733667-001-023-0002.jpg
- Type
- image/jpeg
No machine-readable OCR text for this asset. Photographs without captions may have no extractable text.