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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.

BEACON TARGET REPORTS STIME	11/18/86	ALT	PAGE	11 SYS
RANGE	ACP	LEG	Q
	36.37	1025	90	0	1721-3	484-3	BT	1
	36.75	1031	90	0	4441-1 BT	1
SUBSYS = 1 TOTAL =	4 MODE C TOTAL =	2
2:37:02.268	103.25	805	70	7 RT	1
2:37:02.645	50.62	859	75	7	1200-3	98-3	RB	1
2:37:03.023	36.75	1028	90	0	4441-3	6-3	BT	1
SUBSYS = 1 TOTAL =	3 MODE C TOTAL =	2
2:37:14.414	49.87	860	75	7	1200-3	82-3	RB	1
	51.12	860	78	7 RT	1
2:37:14.789	36.75	1029	90	0	4441-3	292-3	BT	1
SUBSYS = 1 TOTAL =	3 MODE C TOTAL =	2
2:37:26.437	103.25	806	70	7 RT	1
	51.37	873	76	7 RT	1
	49.50	887	77	0	1200-3	64-3	BT	1
2:37:26.938	36.75	1028	90	0	4441-3 BT	1
SUBSYS = 1 TOTAL =	4 MODE C TOTAL =	1
2:37:38.839	49.00	895	78	7	1200-3	55-3	RB	1
	36.75	1029	90	0	4441-3	292-3	BT	1
SUBSYS = 1 TOTAL =	2 MODE C TOTAL =	2
2:37:50.299	48.25	768	67	0	1200-3 BT	1
2:37:50.800	48.12	906	70	7 RT	1
	48.25	901	79	0	1200-3	52-3	BT	1
2:37:51.050	36.75	1028	90	0	4441-3	292-3	BT	1
SUBSYS = 1 TOTAL =	4 MODE C TOTAL =	2
2:38:02.753	48.37	879	77	7 RT	1
	47.62	918	80	7	1200-3	53-3	RB	1
2:38:03.129	36.75	1029	90	0	4441-3	6-3	BT	1
SUBSYS = 1 TOTAL =	3 MODE C TOTAL =	2
2:38:14.771	47.87	927	81	7 RT	1
	48.00	934	82	0	1200-3	72-3	BT	1
2:38:15.146	36.75	1028	90	0	4441-3	292-3	BT	1
SUBSYS = 1 TOTAL =	3 MODE C TOTAL =	2
2:38:26.485	46.62	897	78	7 RT	1
2:38:26.861	48.62	923	81	0	1200-3	90-3	BT	1
	48.75	940	82	0	1200-3 BT	1
2:38:27.238	36.75	1028	90	0	4441-3	6-3	BT	1
SUBSYS = 1 TOTAL =	4 MODE C TOTAL =	2
2:38:38.956	49.12	918	80	0	1200-3	95-3	BT	1
	36.75	1029	90	0	4441-3 BT	1
SUBSYS = 1 TOTAL =	2 MODE C TOTAL =	1
2:38:50.604	46.50	938	81	7 RT	1
2:38:50.979	49.12	903	79	7	1200-3	90-3	RB	1
	36.75	1029	90	0	4441-3 BT	1
SUBSYS = 1 TOTAL =	3 MODE C TOTAL =	1
2:39:02.818	48.37	895	78	7	1200-3	103-3	RB	1
2:39:03.193	36.75	1029	90	0	4441-3	292-3	BT	1
SUBSYS = 1 TOTAL =	2 MODE C TOTAL =	2
2:39:14.908	47.62	899	79	7 RT	1
	47.75	896	78	0	1200-3	124-3	BT	1
2:39:15.283	36.75	1029	90	0	4441-3	292-3	BT	1
SUBSYS = 1 TOTAL =	3 MODE C TOTAL =	2
2:39:26.927	47.12	903	79	7	1200-3	123-3	RB	1
2:39:27.304	36.75	1016	89	0	4441-3	202-3	BT	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.