Ping Ring Data
Here are the ping ring data. Ang is the elevation angle. Ang and Arc are computed from BTO using a spherical Earth model. (I do convert geodetic to geocentric positions where appropriate.) The "Measured Ang" is either computed based on the known longitude and latitude at the time during the early phase of the flight or read off of Fig. 18 in the ATSB report. For the latter, I actually create my own graphics with ping rings overlaying an Earth map at the appropriate place and compared them with the Google Earth version in the report.
UT BTO Ang Arc "Measured" Source of "Measured"
deg km "Ang"
16:30 14933 46.90 4134 46.9 long = 101.69, lat = 2.72
17:07 15620 45.69 4253 45.6 long = 102.79, lat = 5.23
18:25 12520 53.31 3504 53.2 Fig 18, ATSB report
18:27 12533 53.28 3507
18:28 12490 53.39 3496
19:41 11500 56.17 3226 56.1 Fig 18, ATSB report
20:41 11740 55.41 3298 55.4 Fig 18, ATSB report
21:41 12780 52.44 3589 52.3 Fig 18, ATSB report
22:41 14540 47.86 4039 47.7 Fig 18, ATSB report
24:11 18040 39.87 4834 39.8 Fig 18, ATSB report
24:19 18400 39.10 4911
Long, lat are geocentric. 17:07 position taken from ATSB report.