| Limitations |
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| • | Could be over an
hour before alarm is |
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| generated |
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| • | More frequent
measurements impact the |
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| network and
measurements overlap |
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| • | Low impact tools
allow finer grained |
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| measurement |
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| – | Use NWS
multi-variate method |
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| – | Use SCIDAC ABwE
tool |
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| – | Use PingER, OWAMP |
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