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Radar computer printout, continuous data recording

FAA via National Archives / The Black Vault · 179 pages · text by GLM-OCR

This FAA Alaskan Region Public Affairs Office release, dated March 5, 1987, is a computer printout of recorded FAA radar data for Japan Air Lines Flight 1628 on November 17, 1986. It covers 38 minutes of computer time and lists 105 radar returns. Of these, 86 are usable and 19 are uncorrelated primary returns. The printout records when the pilot first asked about other traffic and when he said he could not see the UFO. It also explains that uncorrelated returns occur when the primary and beacon signals do not match in position.

  • p. 3 …COMPUTER CDR PRINTOUT Reference to Japan Air Lines Flight #1628 November 17, 1986, 5:19 pm…
  • p. 20 …the intermittent radar images of Japan Air Lines flight 1628, on November 17, 1986, which occured…
  • p. 163 COMPUTER CDR PRINTOUT Reference to Japan Air Lines Flight #1628 November 17, 1986, 5:19 pm…

Read from the scan by GLM-OCR; expect the odd misread word.

BEACON	TARGET REPORTS STIME	RANGE	11/18/86	PAGE	14
AGE	DEG	Q	BEACON	ALT	QUA	SYS
SUBSYS = 1 TOTAL =	1 MODE C TOTAL =	1
2:46:51.820	52.87	935	82	7	1200-3	85-3	RB	1
SUBSYS = 1 TOTAL =	1 MODE C TOTAL =	1
2:47:03.664	53.37	948	83	7	1200-3	83-3	RB	1
SUBSYS = 1 TOTAL =	1 MODE C TOTAL =	1
2:47:15.691	53.50	960	84	7 RT	1
	53.87	955	83	0	1200-3	82-3	BT	1
SUBSYS = 1 TOTAL =	2 MODE C TOTAL =	1
2:47:27.776	54.37	966	84	7	1200-3	80-3	RB	1
SUBSYS = 1 TOTAL =	1 MODE C TOTAL =	1
2:47:39.488	103.37	805	70	7 RT	1
2:47:39.863	54.87	976	85	7	1200-3	78-3	RB	1
SUBSYS = 1 TOTAL =	2 MODE C TOTAL =	1
2:47:51.888	55.37	977	85	7	1200-3	76-3	RB	1
SUBSYS = 1 TOTAL =	1 MODE C TOTAL =	1
2:48:03.974	55.75	995	87	7	1200-3	74-3	RB	1
SUBSYS = 1 TOTAL =	1 MODE C TOTAL =	1
2:48:16.130	56.00	997	87	0	4431-3	74-3	BT	1
SUBSYS = 1 TOTAL =	1 MODE C TOTAL =	1
2:48:28.160	56.37	1005	88	7	4431-3	70-3	RB	1
SUBSYS = 1 TOTAL =	1 MODE C TOTAL =	1
2:48:40.246	56.37	1021	89	7 RT	1
	56.50	1016	89	7	-4431-3	-66-3	RB	1
SUBSYS = 1 TOTAL =	2 MODE C TOTAL =	1
2:48:52.327	56.37	1026	90	7 RT	1
	56.50	1026	90	0	4431-3	64-3	BT	1
SUBSYS = 1 TOTAL =	2 MODE C TOTAL =	1
2:49:03.973	56.12	1035	90	7 RT	1
2:49:13.427	121.00	89	7	7 RT	1
SUBSYS = 1 TOTAL =	2

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Document, cited by the archive. The PDF is mirrored here; the original link is above. The text was read from the page images by GLM-OCR; expect the odd misread word. 179 pages are in the text index: search them above, or from the library's search.