(IVAR) - Final Report - Strategic Environmental Research and ...

Figure 6-85. Microsoft Excel® workbook of track data from a radar that operated continuously
at ARTI for 24 hours and recorded tracks locally on a DRP (left panel), streamed the same data
over a wired LAN and stored them on an RDS (middle panel) and the scan-by-scan comparison
of two datasets (right panel) .
A formula was written employing simple logic to compare the update times between the datasets,
as shown in Figure 6-85. If the update times were found to match in both the “From_DRP” and
“From_RDS” datasets (i.e.: if the cells were identical), a 0 would appear in the corresponding
cell in the “Comparison” worksheet. If a mismatch was found, a 1 would appear in the
corresponding cell in the “Comparison” worksheet. A summation of the number of mismatches
was then performed and used to calculate the availability of the wired LAN connection.
Results
A total of 328,366 track updates were produced in the 24-hour period of continuous radar data
processing. As we previously discussed in the Performance Assessment section, the number of
track updates depends on the amount of target activity seen by the radar.
Table 6-26 summarizes the findings of the comparison of update times in the DRP and RDS
datasets:
Table 6-26. Results from comparison of the track data recorded locally on a DRP and the same
data streamed to an RDS over a wired LAN for a 24-hour of period of continuous operations.
Number of
Dataset Updates
From_DRP 328366
From_RDS 328366
Differences
Found
Calculated
Availability (%)
0 100
As anticipated, the calculated availability of the wired LAN in the test setup at ARTI was found
to be 100%, well in excess of the 90% target threshold established as the success criterion for
PC3.1.
Conclusion
We successfully demonstrated Performance Criterion PC3.1, Wired LAN Availability. The
scan-wise comparison of update times between 24-hour DRP and RDS datasets yielded a
calculated availability of 100%. This was above the target threshold of 90% availability. This
result is important because it indicates that target track data can be streamed reliably across an
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