733667-001-019-0018
AI Summary
The document discusses the phenomenon of uncorrelated radar signals, specifically the differences between primary radar returns and secondary beacon returns when tracking aircraft.
Key Findings
- Uncorrelated primary and secondary radar returns occur when the timing of the signals does not match. - Primary radar returns are generated from the aircraft's surface, while secondary returns come from the aircraft's transponder. - The document includes a diagram illustrating the concept of correlated versus uncorrelated returns.
OCR Text
UNCGRRELATED 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-- RADAR CELL SAME AIRCRAFT w -- RADAR CELL, 1/4 MILE-- SECONDARY RADAR RETURN (Beacon) (Transponder) PRIMARY RADAR RETURN (Skin~ Surface) =PRIMARY RADAR RETURN =SECONDARY RADAR RETURN ’. (Combined Return) _ Drawing by Paul Steucke March 5, 1987 | | \ sCORRELATED RETURN =UNCORRELATED RETURN
Metadata
- Agency
- —
- Classification
- UNCLASSIFIED
- Department
- National Archives and Records Administration
- Catalog source
- View NARA catalog record
NARA Source
- NAID
- 733667
- File
- 733667-001-019-0018.jpg
- Type
- image/jpeg
No machine-readable OCR text for this asset. Photographs without captions may have no extractable text.