The GUI can be used to configure only up to 6 starting
locations, however the model can support an unlimited number of locations.
The GUI does have a shortcut method to configure a regular matrix
of locations by defining three points, representing the lower left,
upper right, and location increment from the starting location menu (see
example to the right). Once configured, the Run Matrix option is
selected through the Special Simulations menu
tab of the Trajectory menu instead of Run Standard Model.
This causes the locations defined by the grid (in this case 25) to be calculated
and written to the CONTROL
file.
Rerun the 700 hPa isobaric case again but change the Total run
time to 24 hours and choose the 3 source locations as shown to the right. Then
from the Advanced / Configuration Setup / Trajectory menu choose MSL as the
vertical grid coordinate system because terrain height varies across the matrix and set the
restart interval back to 0. Save this configuration and run the Matrix model. When finished set the
Time Label Interval (hrs) to 0 in the Trajectory Display
GUI). The resulting graphic should be similar to the graphic to the right showing the
matrix of 24-h duration isobaric trajectories. Note that we are using spatial and temporal
offsets to get at trajectory error or in this case sensitivity to the meteorological data. |