Greenland
Thule local flight, main flight plan is 1047_v02 (lines 1-7). Planned at takeoff to collect one line (23100) from 1045_v03 which would have been line 8, but decided not to attempt it midflight. Planned on picked up two missed lines from flight plan 1289_v01 (lines 9 and 10 here). On the first attempt at line 1, the DAC and ADC channel 2 lost synchronization. A hard (power state 2) reset was performed before the next line, and line 1 was re-attempted successfully after collecting lines 2 and 3. Roll oscillation on lines 2 and 5 seem inconsistent with mild crosswind and small crab angle. Apparently, the same kind of roll oscillation occurred on those lines on the last OMG deployment. Ron suspects an oversight in the PPA where R_Earth should be R_Earth*cos(latitude), causing this issue only at high latitudes for headings near 0 degrees North. Succeeded in picking up the two missed lines from flight plan 1289_v01. The DGPS archive for this flight is DGPS_14800.tar.gz. ------------------------------------------------------------------------------ Take off from BGTL, (76.5311111111111, -68.7030555555556) Time to first PRE Waypoint: 79 - 89 min | approx distance traveled: 1030 km ============================================================================== LEAD N 78 29.83 W 27 44.47 | NAV1 N 78 33.05 | | 07705PRE W 26 52.95 | 39000 ft GPS | 178<422 kts <433 -------------------------------------------------------------------------- NAV2 N 78 56.27 | | 07705POS W 19 15.77 | 39000 ft GPS | 178<422 kts <433 ============================================================================== Time elapsed: 92 - 107 min | approx distance traveled: 1202 km ============================================================================== LEAD N 78 18.96 W 20 50.04 | NAV3 N 78 29.61 | | 00806PRE W 20 42.84 | 39000 ft GPS | 178<422 kts <433 -------------------------------------------------------------------------- NAV4 N 79 58.65 | | 00806POS W 19 34.48 | 39000 ft GPS | 178<422 kts <433 ============================================================================== Time elapsed: 110 - 130 min | approx distance traveled: 1428 km ============================================================================== LEAD N 79 58.45 W 18 7.78 | NAV5 N 79 52.76 | | 23401PRE W 18 59.91 | 39000 ft GPS | 178<422 kts <433 -------------------------------------------------------------------------- NAV6 N 79 6.02 | | 23401POS W 25 14.16 | 39000 ft GPS | 178<422 kts <433 ============================================================================== Time elapsed: 123 - 148 min | approx distance traveled: 1598 km ============================================================================== LEAD N 78 29.83 W 27 44.47 | NAV7 N 78 33.05 | | 07705PRE W 26 52.95 | 39000 ft GPS | 178<422 kts <433 -------------------------------------------------------------------------- NAV8 N 78 56.27 | | 07705POS W 19 15.77 | 39000 ft GPS | 178<422 kts <433 ============================================================================== Time elapsed: 141 - 171 min | approx distance traveled: 1840 km ============================================================================== LEAD N 81 40.16 W 24 20.82 | NAV9 N 81 37.16 | | 24901PRE W 25 31.82 | 39000 ft GPS | 178<422 kts <433 -------------------------------------------------------------------------- NAV10 N 81 13.46 | | 24901POS W 33 5.77 | 39000 ft GPS | 178<422 kts <433 ============================================================================== Time elapsed: 176 - 211 min | approx distance traveled: 2295 km ============================================================================== LEAD N 80 43.34 W 30 0.30 | NAV11 N 80 53.66 | | 34201PRE W 30 19.06 | 39000 ft GPS | 178<422 kts <433 -------------------------------------------------------------------------- NAV12 N 81 58.82 | | 34201POS W 32 33.71 | 39000 ft GPS | 178<422 kts <433 ============================================================================== Time elapsed: 191 - 231 min | approx distance traveled: 2483 km ============================================================================== LEAD N 82 29.16 W 36 53.37 | NAV13 N 82 25.72 | | 24602PRE W 38 10.92 | 39000 ft GPS | 178<422 kts <433 -------------------------------------------------------------------------- NAV14 N 81 56.51 | | 24602POS W 46 58.00 | 39000 ft GPS | 178<422 kts <433 ============================================================================== Time elapsed: 209 - 254 min | approx distance traveled: 2726 km ============================================================================== LEAD N 80 14.03 W 65 22.31 | NAV15 N 80 4.61 | | 20800PRE W 65 52.51 | 39000 ft GPS | 178<422 kts <433 -------------------------------------------------------------------------- NAV16 N 79 39.93 | | 20800POS W 67 7.14 | 39000 ft GPS | 178<422 kts <433 ============================================================================== Time elapsed: 243 - 293 min | approx distance traveled: 3167 km ============================================================================== Same line as 2016 and 2017 LEAD N 77 2.13 W 71 38.49 | NAV17 N 76 59.53 | | 10610PRE W 70 52.09 | 39000 ft GPS | 178<422 kts <433 -------------------------------------------------------------------------- NAV18 N 76 49.45 | | 10610POS W 68 9.59 | 39000 ft GPS | 178<422 kts <433 ============================================================================== Time elapsed: 273 - 328 min | approx distance traveled: 3548 km ============================================================================== Same line as 2016 and 2017 LEAD N 76 30.70 W 70 42.33 | NAV19 N 76 33.00 | | 08009PRE W 69 57.27 | 39000 ft GPS | 178<422 kts <433 -------------------------------------------------------------------------- NAV20 N 76 41.50 | | 08009POS W 66 47.73 | 39000 ft GPS | 178<422 kts <433 ============================================================================== Time elapsed: 283 - 343 min | approx distance traveled: 3687 km ============================================================================== Landing at BGTL, 76.531111 -68.703056 Total flight time: 287 - 362 min | Total approx distance: 3739 km ==============================================================================