Holmberg, "Drift correction
for gas sensors using multivariate methods," Journal of Chemometrics, vol.
In this work, the trajectory correction is obtained by using two kinds of modules, one is devoted to range correction (drag ring brakes, Figure 8) and the second is devoted to drift correction
(canard based-correction fuze, Figure 9).
After a firm touchdown resulting in a bounce, go around if airspeed fails below reference speed, pitch attitude rises above level flight, or you lose runway alignment and drift correction
If no drift correction
is applied, the 172 will begin drifting north of the extended runway centerline, which is both expected and part of the plan.
Departing Runway 22 you'd fly 220 degrees--and not to apply drift correction
Appropriate mean drift corrections
from two monitors were applied to all intensity measurements.
The tidal corrections are applied automatically by the gravity meter and their small residuum is then removed within the instrument drift corrections
. From the total number of 97 gravity points 5 points (excluding the base station) were measured twice to determine the precision of measurement.