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Label: H1, Preamble: "POS"

Description

Observed on Alaska Airlines (AS) flights.

Examples

Variant 1

Example from flight AS0731, registration N841VA, ICAO AB856C (Alaska Airlines)

Recorded Wednesday, September 21, 2022 21:58:01 UTC

POSN43312W123174,EASON,215754,370,EBINY,220601,ELENN,M48,02216,185/TS215754,0921227A40

Flight was from Seattle, WA (SEA) to San Francisco, CA (SFO).

Variant 2

Example from flight AS1138, registration N319AS, ICAO A36851 (Alaska Airlines)

Recorded Wednesday, September 21, 2022 22:03:10 UTC

POSN45209W122550,PEGTY,220309,134,MINNE,220424,HISKU,M6,060013,269,366,355K,292K,730A5B

In this variant, the 366 is the ground speed in knots.

Flight was from Portland, OR (PDX) to San Jose, CA (SJC).

Variant 3

Example from flight AS0217, registration N639VA, ICAO A86107 (Alaska Airlines)

Recorded Wednesday, September 21, 2022 22:05:22 UTC

POSN43030W122406,IBALL,220516,380,AARON,220816,MOXEE,M47,0047,86/TS220516,092122BF64

Flight was from San Jose, CA (SJC) to Portland, OR (PDX).

Variant 4

Example from flight UA2232, registration N36272, ICAO A41722 (United Airlines)

Recorded Wednesday, September 21, 2022 23:30:36 UTC

POSN33225W079428,SCOOB,232933,340,ENEME,235712,FETAL,M42,003051,15857F6

Flight was from Washington, DC (IAD) to Fort Lauderdale, FL (FLL).

Acronyms / Codes

  • N - Latitude North
  • POS - Position
  • TS - Time Stamp
  • W - Longitude West
  • P - Plus Celcius
  • M - Minus Celcius

Analysis

Comma separated list: <Position>,<Future WayPoint>,<Unknown>,<Altitude in hundreds>,<Future WayPoint>,<Unknown>,<Future WayPoint>,<Outside Air Temperature>,<Unknown>,<Unknown/TimeStamp>,<Groundspeed or Date>,<Unknown>,<Unknown>,<Unknown>

<Position> is POS<Latitude Direction><Latitude*1000><Longitude Direction><Longitude*1000>

In variant 1 and 3, the next to last section includes the <TimeStamp>, <Unknown>/TS<Hour><Minute><Second>

In variant 1 and 3, the last section includes the <Date>, <two digit month><two digit day><two digit year><Unknown>.

Outside air temperature is prefixed with an M when it is minus celcius, and P when it is positive celcius.