From: dwu (Dong Liang Wu)
Date: Tue, 25 Aug 92 14:34:14 MDT

Ben:

	The reason that you've seen the different sequences of data is because
to get 2-dimensional winds we need measure a common spot twice. Each time is 
from different directions. Assuming the wind does not change rapidly during
the measurement, we combine the two to find out zonal and meridional components
of the wind.

	In fact, the HRDI's telescope points first at 45 degree forword
(the angle between telescope and the satellite heading direction)
collecting data and then moves to 135 backward doing the same scan. Time
between the foward and the backward scans is 65 sec. Along the satellite
track, it forms two sequence of scans. That is what you have see two
monotonically increasing time sequences. However, it needs 9 minutes for 
backward scans to see the common volume that forward scans have measured.
In other words, if you shift the backward sequence up by 9 min, they will
be paired up with those forward to represent the measurement at this spot.

	This discontinuity in time probably gave you a hard time in simulation.
If so, please let me know so we can consider some binning technique. The data
points form groups in space. The time and space parameters can be considered
as the average of all included points. Please tell me what you think?

-Don