WSF_ACCESS_DURATION_MOE

moe WSF_ACCESS_DURATION_MOE

moe <name> WSF_ACCESS_DURATION_MOE
   subtype ...
   output ...
end_moe

Overview

WSF_ACCESS_DURATION_MOE computes quantities related to the durations of access intervals of individual free assets. This measure operates on the intervals during which there is coverage from free assets individually rather than coverage from any free asset. As a result, coverage from two different free assets whose access intervals overlap in time will not be counted as one long access interval, but rather two separate intervals, one for each free asset. If such an interval straddles the boundary of the coverage interval, the interval is truncated to begin (or end) when the coverage interval begins (or ends).

Computation Subtype

subtype <sub-type> [<parameter>]

Specify the computation subtype.

WSF_ACCESS_DURATION_MOE has the following subtypes that take no parameter:

• minimum - The measured value will be the minimum access interval duration for the grid point in question.

• maximum - The measured value will be the maximum access interval duration for the grid point in question.

• mean - The measured value will be the mean access interval duration for the grid point in question.

• standard_deviation - The measured value will be the standard deviation of the access interval durations for the grid point in question.

• sum - The measured value will be the sum of the access interval durations for the grid point in question. Note that if access intervals overlap, then this may be longer than the duration of the whole coverage interval.

WSF_ACCESS_DURATION_MOE supports the following subtype that takes an input parameter specifying a percentage value, which must be greater than 0 and less than 100.

• percent_above - For <parameter> percent of the coverage interval, the grid point in question is experiencing an access interval with a duration greater than or equal to the computed value.

Measure Output Commands

output <output-type>
   ...
end_output

output <output_type> … end_output

Specify a form of output to produce for a measure of effectiveness. The allowed values for <output_type> are:

• data - Produces a text file containing the MOE’s value at each grid point.

• grid_stats - Produces a text file that computes summary statistics of the MOE over the grid.

• lat_lon_stats - Produces a text file that computes summary statistics as a function of either latitude or longitude.