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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.

TIME	ACID/SK	ABC/SY	RBC	FRM	RALT	PACP	PDEG	PRAN	RX	RY	DDEG	DRAN	XV	YV	BDG	SPD	ADS C	PAGE	4 SYS	CLS
SUBSYS = 1 TOTAL = 4 MODE C TOTAL = 2
2:24:05.116 1200	1200	47 159	13	62.15	15.03	59.52	14	61.31	0	194	0	193 1	NRM
	15.09	59.67
2:24:05.541	JL1629 -3257	1553	1550	47	350	283	24	93.55	39.46	96.53	24	95.13	-14	-495	191	495	UAR N 1	NRM
	32.33	36.53
2:24:29.359 1200	1200	47 1013	99	35.75	35.12	.04	99	35.99	-101	79	307	129 1	NRM
	35.29	.04
2:24:09.350 0260	0260	47 919	80	35.02	34.50	5.20	81	34.07	-8	55	351	55 1	NRM
	34.57	5.46
SUBSYS = 1 TOTAL = 4 MODE C TOTAL = 1
2:24:19.149 1200	1200	47	75	154	13	62.69	14.62	60.35	13	61.92	-35	196	348	199 1	NRM
	14.85	60.31
2:24:19.500	JL1629 -2257	1552	1550	47	350	297	25	91.99	39.19	84.37	24	92.47	-26	-425	193	495	UAR N 1	NRM
	39.26	84.87
2:24:20.440 1200	1200	47	11	1011	99	35.45	35.73	.48	99	35.65	-98	90	311	132 1	NRM
	35.79	.37
2:24:20.442 0260	0260	47 917	90	34.81	34.34	5.20	81	34.81	-29	19	325	40 1	NRM
	34.43	5.54
SUBSYS = 1 TOTAL = 4 MODE C TOTAL = 3
2:24:30.213 1200	1200	47	75	155	13	53.37	15.23	50.35	14	62.54	1	199	9	199 1	NRM
	14.98	60.93
2:24:30.515	JL1629 -0057	1550	1550	47	350	292	25	90.49	39.32	83.15	25	91.90	-14	-497	191	497	UAR N 1	NRM
	39.25	93.20
2:24:32.451 1200	1200	47	14	1007	99	35.02	35.23	.54	99	35.17	-129	91	306	135 1	NRM
	35.37	.62
2:24:32.453 0260	0260	47 917	90	34.51	34.34	5.25	81	34.95	-39	21	209	44 1	NRM
	34.29	5.56
SUBSYS = 1 TOTAL = 4 MODE C TOTAL = 3
2:24:42.222 1200	1200	47	75	155	13	64.00	15.20	51.51	13	63.14	19	197	5	199 1	NRM
	15.09	61.56
2:24:42.511	JL1629 -0057	1550	1550	47	350	297	26	98.95	39.26	91.39	25	90.22	-9	-521	181	500	UAR N 1	NRM
	39.23	91.51
2:24:44.491 1200	1200	47	15	1003	99	34.41	34.75	.35	99	34.65	-134	41	207	111 1	NRM
	34.84	.65
2:24:44.491 0260
2:24:44.491	0115-1521	0260	11
	34.56	5.87
2:24:44.497	0115-1622	0260	11
	34.17	5.14
SUBSYS = 1 TOTAL = 6 MODE C TOTAL = 3
2:24:54.252 1200	1200	47	75	154	13	64.62	15.15	62.15	13	63.77	19	196	5	199 1	NRM
	15.15	62.17
2:24:54.525	JL1629 -0057	1550	1550	47	350	393	26	97.42	39.21	79.75	25	99.65	-9	-504	190	503	UAR N 1	NRM
	39.20	79.92
2:24:56.512 1200	1200	47	16	1213	89	33.83	34.25	.25	89	34.14	-147	-0	263	147 1	NRM
	34.31	.53
2:24:56.514 0250	0260	47 917	90	34.40	34.32	5.29	81	34.94	-35	11	297	39 1	NRM
	34.05	5.56
2:24:56.974 1200	1200	37	115	1031	90	49.14	47.95	-1.76	92	47.99	54	377	8	393 1	NRM
	47.95	-1.82
SUBSYS = 1 TOTAL = 5 MODE C TOTAL = 4
	2:25:05.081 1200	1200	47	74	153	13	65.24	15.21	62.79	13	64.42	18	135	5	199 1	NRM

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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.