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USAF record 28982642

28982642

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PROJECT 10073 RECORD CARD

1. DATE 18 Mar 52

2. LOCATION Duluth Minnesota Sec Radar Film See Also: Radar Film [STAMP:]

3. DATE-TIME GROUP Local 1820 GMT 23/03/52

4. TYPE OF OBSERVATION Ground-Visual [HW:] Ground-Radar [HW:] Air-Visual [HW:] Air-Intercept Radar [HW:]

5. PHOTOS Dyas Field [HW:] No

6. SOURCE Radar Film

7. LENGTH OF OBSERVATION 20 min

8. NUMBER OF OBJECTS ONE

9. COURSE ILLEGIBLE ONCE

10. BRIEF SUMMARY OF SIGHTING Color ranged orange, red, white, & green w/rotating red and green lights top & bottom Very high speed, faded out of sight. See Also: Radar Film N - 3745 - 340 (CHM IA SPECIMEN FILE)

11. COMMENTS Radar readings were due to interference an not existence of real targets Probably due to excessive activity of northern Lights Obj seen visually probably planet Venus brought into visibility by refraction through alternate layers of air of different temperatures to create the effects of no movement a change of color & shape.

12. CONCLUSIONS Was Balloon Probably Balloon Probably Balloon Was Aircraft Probably Aircraft Probably Aircraft Was Astronomical Voids Probably Astronomical Possibly Astronomical Other Unknown Date for Evaluation Unknown

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