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 60 Original source ↗

SUBSYS = 1 TOTAL = 3 MODE C TOTAL = 3

2:49:19.392 105.25 1914 159 0 4371-3 211-3 BT 1

2:49:19.259 57.25 1925 169 0 1550-3 313-3 BT 1

2:49:19.511 57.37 2115 195 0 1550-3 310-3 BT 1

SUBSYS = 1 TOTAL = 3 MODE C TOTAL = 3

2:49:30.477 106.37 1914 159 0 4371-3 211-3 BT 1

2:49:30.853 59.00 1927 169 0 1550-3 310-3 BT 1

2:49:31.229 59.12 2115 185 0 1550-3 310-3 BT 1

SUBSYS = 1 TOTAL = 3 MODE C TOTAL = 3

2:49:42.497 107.50 1914 159 0 4371-3 211-3 BT 1

2:49:42.873 62.62 1927 169 0 1550-3 310-3 BT 1

2:49:43.249 50.75 2111 185 0 1550-3 310-3 BT 1

SUBSYS = 1 TOTAL = 3 MODE C TOTAL = 3

2:49:54.581 109.62 1914 159 0 4371-3 211-3 BT 1

2:49:54.955 52.25 1927 169 0 1550-3 310-3 BT 1

2:49:55.332 52.37 2122 185 0 1550-1 BT 1

SUBSYS = 1 TOTAL = 3 MODE C TOTAL = 2

2:49:06.289 109.75 1919 159 0 4371-3 BT 1

2:49:07.040 64.00 1927 169 0 1550-3 310-3 BT 1

SUBSYS = 1 TOTAL = 34.00 1998 175 0 1550-1 BT 1

SUBSYS = 1 TOTAL = 3 MODE C TOTAL = 1

2:49:19.313 110.67 1817 159 0 4371-3 211-3 BT 1

2:49:19.935 65.62 1926 169 0 1550-3 310-3 BT 1

SUBSYS = 1 TOTAL = 2 MODE C TOTAL = 2

2:49:30.522 111.97 1517 159 0 4371-3 211-3 BT 1

2:49:30.896 57.25 1928 169 0 1550-3 310-3 BT 1

SUBSYS = 1 TOTAL = 2 MODE C TOTAL = 2

2:49:42.519 113.00 1913 159 0 4371-3 211-3 BT 1

2:49:42.993 55.57 1927 159 0 1550-3 312-3 BT 1

SUBSYS = 1 TOTAL = 2 MODE C TOTAL = 2

2:49:54.035 114.12 1919 159 0 4371-3 211-3 BT 1

2:49:55.012 72.50 1927 169 0 1550-3 310-3 BT 1

SUBSYS = 1 TOTAL = 2 MODE C TOTAL = 2

2:50:05.719 90.12 1867 164 0 2332-3 290-3 BT 1

SUBSYS = 1 TOTAL = 1 MODE C TOTAL = 1

2:50:19.427 115.37 1521 150 0 4371-3 211-3 BT 1

SUBSYS = 1 TOTAL = 1 MODE C TOTAL = 1

2:50:30.641 117.37 1321 160 0 4371-3 211-3 BT 1

2:50:31.217 75.52 1922 169 0 1552-3 314-3 BT 1

SUBSYS = 1 TOTAL = 2 MODE C TOTAL = 2

2:50:54.761 119.62 1922 152 0 4371-3 211-3 BT 1

SUBSYS = 1 TOTAL = 1 MODE C TOTAL = 1

2:51:05.791 120.75 1923 160 0 4321-3 211-3 BT 1

SUBSYS = 1 TOTAL = 1 MODE C TOTAL = 1

2:51:07.163 92.75 1931 165 0 2332-3 290-3 BT 1

SUBSYS = 1 TOTAL = 3 MODE C TOTAL = 3

2:51:13.523 121.87 1924 163 0 4371-3 211-3 BT 1

SUBSYS = 1 TOTAL = 3 MODE C TOTAL = 3

2:51:19.193 31.37 1935 165 0 2332-3 292-3 BT 1

SUBSYS = 1 TOTAL = 3 MODE C TOTAL = 3

2:51:31.153 93.25 1929 169 0 1550-3 309-3 BT 1

SUBSYS = 1 TOTAL = 1 MODE C TOTAL = 1

2:51:42.749 124.03 1827 160 0 4321-3 211-3 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.