Table 1.

Compression Speed Determination

Method	Delay, s	Speed, km/s	Normal
SC pairs B z			*along sep. vector in x‐y
MMS‐VAP‐A	12–18	1020–1530	In and dusk
MMS‐VAP‐B	12–20	1340–2240	In
VAP‐A‐VAP‐B	4–11	1200–3200	In and dawn
4 SC		1250–1500	(−0.9, −0.3, and +0.1)