733667-001-022-0010
AI Summary
The document discusses the phenomenon of uncorrelated radar signals, explaining how primary and secondary radar returns can occur at different times, leading to discrepancies in radar tracking of aircraft.
Key Findings
- Uncorrelated radar signals occur when primary and secondary returns do not match in timing or location. - Primary radar returns are based on radar energy reflecting off the aircraft's surface. - Secondary radar returns come from the aircraft's transponder signal. - The document includes a diagram illustrating the concept of correlated and uncorrelated 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. | a Af : —_— --RADAR COMPUTER CELL, 1/4 MILE-- RADAR CELL SAME AIRCRAFT \ (Crossing Cell) ON y. MM AA7 = -- RADAR CELL, 1/4 MILE-- cae QLD (Beacon) (Transponder) V— PRIMARY RADAR RETURN (Skin- Surface) =PRIMARY RADAR RETURN (N) =SECONDARY RADAR RETURN =CORRELATED RETURN (Combined Return) Drawing by Paul Steucke March 5, 1987 =UNCORRELATED RETURN
Metadata
- Agency
- —
- Classification
- UNCLASSIFIED
- Department
- National Archives and Records Administration
- Catalog source
- View NARA catalog record
NARA Source
- NAID
- 733667
- File
- 733667-001-022-0010.jpg
- Type
- image/jpeg
No machine-readable OCR text for this asset. Photographs without captions may have no extractable text.