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 108 Original source ↗

BEACON LABEL REPORTS STIME RANGE AGP DEG Q 11/1^/^5 BEACON ALT PAGE QUA SYS

2:44:07.995 22.50 1914 170 0 1550-3 310-3 BT 1

31.12 2441 214 0 1200-3 71-3 BT 1

7 MODE C TOTAL = 5

20.12 951 83 0 0260-1 BT 1

19.12 1207 195 0 0152-3 BT 1

22.97 1239 109 0 1271-3 BT 1

24.82 1257 110 0 1547-3 56-3 BT 1

25.00 1281 112 0 1547-3 BT 1

24.12 1895 155 0 1550-3 310-3 BT 1

30.62 2435 214 0 1200-3 74-3 BT 1

7 MODE C TOTAL = 3

20.12 948 83 0 0260-1 BT 1

22.87 1237 109 0 1271-3 710-3 ID BT 1

19.25 1221 107 0 0152-3 BT 1

24.75 1247 109 0 1547-3 52-3 ID BT 1

25.62 1897 166 0 1550-3 310-3 BT 1

25.75 1939 170 0 1550-3 310-3 BT 1

30.12 2429 213 0 1200-3 74-3 BT 1

7 MODE C TOTAL = 5

23.12 1235 108 0 1271-3 ID BT 1

24.50 1229 108 0 1547-3 49-3 BT 1

22.97 1239 108 0 1271-3 710-3 BT 1

19.25 1236 108 0 0162-3 BT 1

27.37 1907 167 0 1550-3 310-3 BT 1

35.97 2211 195 0 1200-3 BT 1

29.62 2423 212 0 1200-3 74-3 BT 1

7 MODE C TOTAL = 4

24.25 1213 106 0 1547-3 45-3 BT 1

22.87 1239 108 0 1271-3 710-3 BT 1

29.00 1915 169 0 1550-3 310-3 BT 1

29.25 2209 194 0 1200-3 74-3 BT 1

35.50 2240 196 0 1200-3 PT 1

29.12 2410 211 0 1200-3 BT 1

6 MODE C TOTAL = 5

20.12 948 83 0 0000-0 BT 1

24.12 1197 105 0 1547-3 42-3 BT 1

22.75 1239 108 0 1271-3 710-3 BT 1

30.52 1917 168 0 1550-3 310-3 BT 1

29.75 2259 199 0 1200-3 BT 1

35.12 2239 196 0 1200-3 BT 1

29.75 2411 211 0 1200-3 BT 1

7 MODE C TOTAL = 4

24.00 1176 103 0 1547-3 39-3 BT 1

22.75 1239 108 0 1271-3 710-3 BT 1

19.37 1273 111 0 0152-3 BT 1

24.00 1300 114 0 0000-0 BT 1

32.37 1903 167 0 1550-3 310-3 BT 1

34.62 2244 197 0 1200-3 BT 1

5 MODE C TOTAL = 3

23.75 1152 102 0 1547-3 36-3 BT 1

22.75 1239 108 0 1271-3 710-3 BT 1

34.00 1912 168 0 1550-3 310-3 BT 1

27.75 2279 220 0 0152-3 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.