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Vaisala IRIS - Page 20

Vaisala IRIS
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Each product is associated with a task, which provides the ingest data for the product.
TASK Summary information, taken from the associated task, shows the key task
configuration parameters.
When associating a task with a product, the system must consider matched resolution
sampling and constructing volume scans for a product.
1. Select TASK Name to show a list of tasks.
Note that certain product types require dierent types of task associations.
Product Type Description
Running a product
from ingest data
Enter a task name, including wildcard characters.
The question mark (?) matches a single character; the asterisk (*) matches any
string of characters.
Volume scan
product from hybrid
tasks
In the task name section:
Specify the input tasks with an underscore and single letter.
Specify the sub-task sux letters in the Sub Task box.
Type a "*" to indicate all subtasks.
Type individual letters such as ABC, AB, BC, or AC to select which portions of
the hybrid to include.
Type "–" to indicate a range of letters, for example "A–DF" means ABCD and F.
RAW products Always made from a single task.
You must make a separate RAW product for each sub task.
If you are retrieving RAW data from tape or receiving a RAW product over the
network, there is no task configuration file on your disk. In this case, type the task
name directly in the field, exactly as it appears in the Ingest Summary menu or
the Tape menu.
RHI products Include RHI in RHI task names to distinguish them from PPI scans.
2. To optimize product appearance and system performance, define the matched
resolution sample.
For best results, the range bin spacing and number of bins in the task should match
what is needed for the product. This is called a matched resolution sample. The match
does not need to be exact because IRIS uses interpolation algorithms.
For best performance, match the range bin spacing, number of bins and maximum
range in the task configuration, to the desired pixel resolution, pixel scale and maximum
product range in the product configuration.
For example, if you are making a low resolution product (240 × 240) to a range of
120 km (74.6 mi), and you want a single pixel to represent 1 km (0.6 mi) of data,
configure the task configured with at least 120 range bins spaced 1000 m (3280 ft
10 in) apart.
Note that 170 bins can be displayed to the corners of the product. For a medium
resolution product with 1 km (0.6 mi) bin spacing, the best match is for tasks with 240
to 340 bins spaced 1 km (0.6 mi) apart. Note that IRIS can make products for any range
bin spacing that can be specified in the TASK Configuration menu, for example, 500 m
(1640 ft 5 in) or 250 m (820 ft 3 in) spacings can be used as well.
IRIS Product and Display User Guide M211319EN-H
18 RESTRICTED

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