BLT Trajectory

DSCOVR, ACE, WIND, and KPLO positions 

2022.08.25

• IMF passes: ACE → DSCOVR → KPLO

• There are time delays among these B-field data.

• This suggests that IMF propagation angle made by x axis and IMF line is not parallel to the x axis in the GSE XY plane.

2022.10.20

• IMF passes: ACE → WIND → KPLO

• B-field measured from WIND has delay about 10 minutes compared to ACE’s field.

• From this, IMF propagation angle seems larger than the angle made by the line parallel to WIND-ACE line.

2022.11.04

• IMF passes: DSCOVR → ACE → KPLO

• To assume the IMF propagation angle, understanding of 3 dimensional position of these spacecrafts is needed.