Radar computer printout, continuous data recording

FAA via National Archives / The Black Vault · 179 pages · text by 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.

Open the PDF at page 107 Original source ↗

BEACON TARIET REPORTS

STIME RANGE ACP DEG Q 11/18/86 BEACON ALT PAGE QUA SYS

2:42:29.675 27.25 1424 125 0 1547-3 93-3 BT 1

2:42:29.801 9.87 1807 159 0 1550-3 310-3 BT 1

2:42:31.303 35.12 2261 198 0 1200-3 74-3 BT 1

SUBSYS = 1 TOTAL = 5 MODE C TOTAL = 4

2:42:39.257 20.12 947 93 0 0260-3 BT 1

2:42:40.003 22.87 1239 109 0 1271-3 710-3 BT 1

2:42:42.384 26.87 1394 121 0 1547-3 BT 1

2:42:40.758 27.00 1411 124 0 1547-3 80-3 BT 1

2:42:41.999 11.37 1925 130 0 1550-3 310-3 BT 1

2:42:43.994 34.62 2482 219 0 1200-3 74-3 BT 1

SUBSYS = 1 TOTAL = 6 MODE C TOTAL = 4

2:12:51.282 20.12 950 83 0 0260-1 BT 1

2:12:52.234 22.87 1239 109 0 1271-3 710-3 BT 1

2:42:52.785 25.62 1395 121 0 1547-3 77-3 BT 1

2:42:53.912 12.87 1839 161 0 1550-3 309-3 BT 1

2:42:55.954 34.12 2471 217 0 1200-3 74-3 BT 1

SUBSYS = 1 TOTAL = 5 MODE C TOTAL = 4

2:43:03.367 20.12 951 93 0 0260-1 BT 1

2:43:04.118 22.75 1239 108 0 1271-3 BT 1

2:43:04.194 25.37 1369 120 0 1547-3 74-3 BT 1

2:43:25.935 14.50 1341 161 0 1550-3 309-3 BT 1

2:43:07.972 33.62 2472 217 0 1200-3 74-3 BT 1

SUBSYS = 1 TOTAL = 5 MODE C TOTAL = 3

2:43:15.515 20.12 947 83 0 0260-3 BT 1

2:43:15.202 22.75 1232 108 0 1271-3 710-3 BT 1

2:43:16.575 25.12 1352 118 0 1547-3 71-3 BT 1

2:43:17.205 16.04 1934 159 0 1550-3 BT 1

2:43:19.205 33.12 2270 199 0 1200-1 BT 1

2:43:19.961 33.02 2453 216 0 1200-3 74-3 BT 1

SUBSYS = 1 TOTAL = 6 MODE C TOTAL = 3

2:43:27.475 20.12 949 83 0 0000-0 BT 1

2:43:29.352 22.75 1237 108 0 1271-3 710-3 BT 1

2:43:31.737 32.62 2459 216 0 1200-3 71-3 BT 1

SUBSYS = 1 TOTAL = 3 MODE C TOTAL = 2

2:43:40.005 19.25 1163 102 0 0162-3 BT 1

2:43:40.383 22.87 1239 108 0 1271-3 710-3 BT 1

2:43:42.262 19.25 1832 165 0 1550-3 310-3 BT 1

19.25 1937 172 0 1550-3 BT 1

2:43:43.763 32.12 2452 215 0 1200-3 74-3 BT 1

SUBSYS = 1 TOTAL = 5 MODE C TOTAL = 3

2:43:51.353 20.12 949 83 0 0260-1 BT 1

2:43:52.058 19.12 1181 103 0 0162-3 BT 1

22.87 1238 108 0 1271-3 710-3 BT 1

2:43:52.465 25.37 1300 114 0 1547-3 63-3 BT 1

2:43:53.967 20.75 1566 165 0 1550-3 310-3 BT 1

2:43:54.469 20.97 1948 171 0 1550-3 310-3 BT 1

2:43:55.972 31.82 2441 214 0 1200-3 74-3 BT 1

SUBSYS = 1 TOTAL = 7 MODE C TOTAL = 5

2:44:03.363 20.12 949 83 0 0000-0 BT 1

2:44:04.113 19.12 1193 104 0 0162-3 BT 1

2:44:04.185 22.75 1233 109 0 1271-3 710-3 BT 1

25.12 1292 112 0 1547-3 59-3 BT 1

2:44:06.365 22.37 1892 166 0 1550-3 310-3 BT 1

Cited by

Japan Air Lines Flight 1628: The Alaska Mothership 1986

About this file

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