RADCAT Case Directory
  Category 9, RADAR  


RADCAT is a revitalized special project now being conducted jointly by NICAP & Project 1947 with the help and cooperation of the original compiler of RADCAT, Martin Shough, to create a comprehensive listing of radar cases with detailed documentation from all previous catalogues, including UFOCAT and original RADCAT.

Four Large Objects Tracked On Ground Radar
July 27, 1952
Belleville, Illinois

Dan Wilson:
July 27, 1952; Belleville, Illinois (BB)
Bt. 7:20 p.m. and 8:30 p.m CST.  Four objects were observed on ground radar equipment (FPS-3) of the 798th AC&W Squadron. The objects were eliptical in shape and the target return was comparable with B-50 or B-36 echos. The speed of the objects was estimated at 2,800 to 3,200 knots and the direction of travel was from south to north and north to south. (Dan Wilson)

Brad Sparks:
They are classic mutual radar interference cases with high-speed targets moving inward and outward radially (with a little spiralling) and never
proceeding to the other side of the scope???  The Belleville radar station SAID it was found to be mutual interference: "Adjacent and local electronics station[s] were checked for antenna and frequency opposition and it was determined that the targets WERE ELECTRONIC INTERFERENCE caused by an ADJACENT RADAR STATION."

Don Ledger:
<>My only response to this would be what adjacent radar station , how far away and how did it produce 4-6, quote "solid objects" rather than blanket noise or nulling effects (phasing?) caused by what seems to be identical frequency pulses from a nearby station? Best guess reflected returns off conventional traffic from other station's pulse. Traffic was present. Is there a more detailed explanation somewhere? This should have been a constant problem if two stations were sharing the same radar  freqs. If not then something else (perhaps ducting) must have been the culprit in this case.

Detailed reports and documents
reports/520727belleville_rep.htm (Dan Wilson)

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