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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.

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

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BEACON TARGET REPORTS	11/18/86	PAGE	QUA	SY
STIME	RANGE	AGP	DEG	Q	BEACON	ALT
2:20:34.868	121.87	224	19	?	1550-3	350-3 KB	1
SUBSYS = 1 TOTAL = 2 MODE C TOTAL = 1
2:20:46.574	52.00	184	16	0	1200-3	75-3 BT	1
	51.87	177	15	7	1200-3 RB	1
2:20:46.946	120.12	229	19	? KT	1
	120.25	227	19	0	1550-3	350-3 BT	1
SUBSYS = 1 TOTAL = 4 MODE C TOTAL = 2
2:20:58.585	52.50	177	15	0	1200-3	74-3 BT	1
2:20:58.962	118.62	228	20	?	1550-3	350-3 RB	1
SUBSYS = 1 TOTAL = 2 MODE C TOTAL = 2
2:21:10.666	53.12	175	15	0	1200-3	74-3 BT	1
2:21:11.041	117.00	232	20	?	1550-3	350-3 RB	1
2:21:12.543	103.37	806	70	? RT	1
SUBSYS = 1 TOTAL = 3 MODE C TOTAL = 2
2:21:22.750	53.62	171	15	? KT	1
	53.75	176	15	0	1200-3	75-3 BT	1
	115.39	236	20	? RT	1
	115.50	235	20	0	1550-3	350-3 RT	1
SUBSYS = 1 TOTAL = 4 MODE C TOTAL = 2
2:21:34.775	54.37	175	15	?	1200-3	75-3 RB	1
	113.87	238	20	?	1550-3	350-3 RB	1
SUBSYS = 1 TOTAL = 2 MODE C TOTAL = 2
2:21:46.615	54.87	174	15	0	1200-3 BT	1
2:21:46.990	112.37	240	21	?	1550-3	350-3 RB	1
SUBSYS = 1 TOTAL = 2 MODE C TOTAL = 1
2:21:58.656	55.50	174	15	?	1200-3	75-3 RB	1
2:21:59.073	110.62	246	21	? RT	1
	110.75	242	21	0	1550-3	350-3 RT	1
SUBSYS = 1 TOTAL = 3 MODE C TOTAL = 2
2:22:10.716	56.25	175	15	? BT	1
	56.12	173	15	0	1200-3 RB	1
SUBSYS = 1 TOTAL = 3 MODE C TOTAL = 1
2:22:22.794	56.75	172	15	?	1200-3 RP	1
2:22:25.170	107.50	249	21	?	1550-3	350-3 RB	1
2:22:24.672	103.25	807	70	? RT	1
SUBSYS = 1 TOTAL = 3 MODE C TOTAL = 1
2:22:34.880	57.37	171	15	?	1200-3 RP	1
	105.87	255	22	? KT	1
	106.00	252	22	?	1550-3	350-3 RT	1
SUBSYS = 1 TOTAL = 4 MODE C TOTAL = 1
2:22:46.718	58.00	169	14	?	1200-3	75-3 RB	1
2:22:47.217	104.37	257	22	?	1550-3 RB	1
SUBSYS = 1 TOTAL = 2 MODE C TOTAL = 1
2:22:58.800	58.62	168	14	?	1200-3	75-3 RB	1
2:22:59.177	102.87	258	22	?	1550-3	350-3 RB	1
SUBSYS = 1 TOTAL = 2 MODE C TOTAL = 2
2:25:10.826	59.00	171	15	? RT	1
	59.25	167	14	0	1200-3	75-3 BT	1
	101.25	263	23	?	1550-3	350-3 RB	1
SUBSYS = 1 TOTAL = 3 MODE C TOTAL = 2
2:25:22.012	59.75	166	14	?	1200-3	75-3 RB	1

About this file

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.