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.

Open the PDF at page 27 Original source ↗

Read from the scan by GLM-OCR; expect the odd misread word.

| TIME | ACID/SX | ABC/SY RBC FAM RALT | PACP PDEG | PRAN | RX | PY | DDEG | DRAN | XV | YV | HDG SPD | ADS C | SYS GLE |

| :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- |

| 14.27 | 174.49 | | | | | | | | | | | | | | |

| SUBSYS = 1 | TOTAL = 1 MODE C TOTAL = 1 | | | | | | | | | | | | | 1 NPM |

| 2:15:12.917 | JL1629 -0257 1550 1550 47 351 | 163 | 14 | 176.65 | 44.12 | 172.79 | 14 | 177.69 | -35 | -522 184 505 | UAR N | 1 NPM |

| 14.01 | 172.79 | | | | | | | | | | | | | | |

| SUBSYS = 1 | TOTAL = 1 MODE C TOTAL = 1 | | | | | | | | | | | | | 1 NPM |

| 2:13:52.278 | JL1629 -0057 1550 1550 47 350 | 165 | 14 | 175.05 | 44.25 | 171.29 | 14 | 175.33 | -7 | -524 190 503 | UAR N | 1 NPM |

| 14.05 | 171.10 | | | | | | | | | | | | | | |

| SUBSYS = 1 | TOTAL = 1 MODE C TOTAL = 1 | | | | | | | | | | | | | 1 NPM |

| 2:14:25.232 | JL1629 -0057 1550 1550 47 350 | 165 | 14 | 173.37 | 43.57 | 169.59 | 14 | 171.63 | -14 | -532 195 523 | UAR N | 1 NPM |

| 13.81 | 159.45 | | | | | | | | | | | | | | |

| SUBSYS = 1 | TOTAL = 1 MODE C TOTAL = 1 | | | | | | | | | | | | | 1 NPM |

| 2:14:17.113 | JL1629 -0057 1550 1550 47 350 | 167 | 14 | 171.79 | 43.95 | 167.91 | 14 | 173.15 | -21 | -520 182 501 | UAR N | 1 NPM |

| 13.91 | 157.73 | | | | | | | | | | | | | | |

| SUBSYS = 1 | TOTAL = 1 MODE C TOTAL = 1 | | | | | | | | | | | | | 1 NPM |

| 2:11:29.175 | JL1629 -0057 1550 1550 47 350 | 169 | 14 | 170.14 | 43.54 | 166.25 | 14 | 171.53 | -37 | -495 184 495 | UAR N | 1 NPM |

| 13.54 | 155.14 | | | | | | | | | | | | | | |

| SUBSYS = 1 | TOTAL = 1 MODE C TOTAL = 1 | | | | | | | | | | | | | 1 NPM |

| 2:14:41.310 | JL1629 -0057 1550 1550 47 350 | 169 | 14 | 159.55 | 43.64 | 164.53 | 14 | 169.95 | -29 | -495 193 496 | UAR N | 1 NPM |

| 13.56 | 161.19 | | | | | | | | | | | | | | |

| SUBSYS = 1 | TOTAL = 1 MODE C TOTAL = 1 | | | | | | | | | | | | | 1 NPM |

| 2:14:53.353 | JL1629 -0057 1550 1550 47 350 | 171 | 15 | 156.33 | 43.45 | 162.30 | 14 | 159.36 | -29 | -493 193 495 | UAR N | 1 NPM |

| 13.45 | 162.95 | | | | | | | | | | | | | | |

| SUBSYS = 1 | TOTAL = 1 MODE C TOTAL = 1 | | | | | | | | | | | | | 1 NPM |

| 2:15:05.177 | JL1629 -0057 1550 1550 47 349 | 172 | 15 | 165.35 | 43.54 | 161.22 | 15 | 163.79 | -15 | -494 181 494 | UAR N | 1 NPM |

| 43.45 | 161.20 | | | | | | | | | | | | | | |

| SUBSYS = 1 | TOTAL = 1 MODE C TOTAL = 1 | | | | | | | | | | | | | 1 NPM |

| 2:15:17.219 | JL1629 -0057 1550 1550 47 349 | 174 | 15 | 163.73 | 43.35 | 159.56 | 15 | 155.19 | -19 | -493 182 494 | UAR N | 1 NPM |

| 13.39 | 159.54 | | | | | | | | | | | | | | |

| SUBSYS = 1 | TOTAL = 1 MODE C TOTAL = 1 | | | | | | | | | | | | | 1 NPM |

| 2:15:29.239 | JL1629 -0057 1550 1550 47 349 | 176 | 15 | 162.14 | 43.42 | 157.95 | 15 | 163.63 | -19 | -494 181 494 | UAR N | 1 NPM |

| 13.37 | 157.89 | | | | | | | | | | | | | | |

| SUBSYS = 1 | TOTAL = 1 MODE C TOTAL = 1 | | | | | | | | | | | | | 1 NPM |

| 2:15:41.353 | JL1629 -0057 1550 47 | 178 | 15 | 164.57 | 43.73 | 156.22 | 15 | 152.03 | 18 | -495 177 493 | UAR N | 1 NPM |

| 13.51 | 156.20 | | | | | | | | | | | | | |

| SUBSYS = 1 | TOTAL = 1 | | | | | | | | | | | | | |

| 2:15:53.257 | JL1629 -0057 1550 1550 47 349 | 179 | 15 | 158.99 | 43.03 | 154.59 | 15 | 150.39 | -24 | -493 192 499 | UAR N | 1 NPM |

| 13.31 | 154.54 | | | | | | | | | | | | | |

| SUBSYS = 1 | TOTAL = 1 MODE C TOTAL = 1 | | | | | | | | | | | | | |

| 2:15:55.325 | JL1629 -0057 1550 1550 47 349 | 183 | 15 | 157.27 | 43.10 | 153.31 | 15 | 158.93 | -25 | -494 194 495 | UAR N | 1 NPM |

| 13.15 | 152.92 | | | | | | | | | | | | | |

| SUBSYS = 1 | TOTAL = 1 MODE C TOTAL = 1 | | | | | | | | | | | | | |

| 2:15:17.329 | JL1629 -0057 1550 1550 47 349 | 181 | 15 | 155.62 | 42.85 | 151.26 | 15 | 157.20 | -49 | -493 185 497 | UAR N | 1 NPM |

| 12.95 | 151.25 | | | | | | | | | | | | | |

| SUBSYS = 1 | TOTAL = 1 MODE C TOTAL = 1 | | | | | | | | | | | | | |

| 2:15:29.425 | JL1629 -0057 1550 1550 47 349 | 182 | 15 | 154.03 | 42.90 | 149.70 | 15 | 155.75 | -42 | -491 194 494 | UAR N | 1 NPM |

| 12.91 | 149.52 | | | | | | | | | | | | | |

| SUBSYS = 1 | TOTAL = 1 MODE C TOTAL = 1 | | | | | | | | | | | | | |

| 2:15:41.422 | JL1629 -0057 1550 1550 47 349 | 194 | 15 | 152.46 | 42.92 | 149.00 | 15 | 154.15 | -24 | -492 182 493 | UAR N | 1 NPM |

| 12.91 | 147.98 | | | | | | | | | | | | | |

| SUBSYS = 1 | TOTAL = 1 MODE C TOTAL = 1 | | | | | | | | | | | | | |

| 2:16:53.434 | JL1629 -0057 1550 1550 47 349 | 197 | 15 | 150.99 | 42.90 | 146.31 | 15 | 152.56 | -10 | -493 151 492 | UAR N | 1 NPM |

| 12.82 | 146.32 | | | | | | | | | | | | | |

| SUBSYS = 1 | TOTAL = 1 MODE C TOTAL = 1 | | | | | | | | | | | | | | |

Cited by

Japan Air Lines Flight 1628: The Alaska Mothership 1986

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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.