1. In the top section of the NDOP configuration window, specify the tasks and sites.
a. To select a site, select the Site button.
b. To select a task based on the ingest files on your system, select the TASK button.
If the task you want is not in the list, type the task name. You can use IRIS wildcard
conventions, such as:
• PPI*
Use any task that starts with PPI.
• PPIVOL_A
Use only the A part of the hybrid task.
• PPIVOL_BC
Use only the BC parts of the hybrid task.
If you have specified a single task, the range field is filled-in with the maximum
range of the data for that task.
If you use a wildcard or hybrid task specification the Range field is blank.
c. Select the input data, V or Vc (radial velocity or corrected radial velocity).
d. To enter a site ID associated with the product output, select Output Site ID.
When the NDOP products appear in inventories such as the Product Output Menu
or Quick Look Window, they are associated with this site.
e. In the TASK (time) Window, specify is the maximum time dierence that is
tolerated for combining the data from the two radars.
If the dierence in the task start times is greater than this value, NDOP does not
make the product. This prevents problems caused by advection and temporal
changes that could cause inappropriate winds to be combined. A value of 2 minutes
is typical.
2. In the middle section of the NDOP configuration window, specify the map projection
for the product.
The projection should be at a convenient point perhaps between the radars and cover a
range that is no more than approximately 4 times the baseline length. This is typically
the useful range of the NDOP product.
If you do not specify a Projection Name, the data is centered on the location of the first
radar site in the list.
IRIS Product and Display User Guide M211319EN-H
172 RESTRICTED
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