Jim Ulvestad
April 9, 1999
This memo gives phase-referencing switching times to be used by the
VLBA, as calculated from equations given by Beasley and Conway.
Estimates are given as a function of elevation angle for 8 wavelengths
ranging from 7 mm to 21 cm, and for good, bad, and typical
tropospheric conditions, always assuming a speed of 10 m s
for the turbulence.