Figure 3.4-2d Miles City Individual Sensor Element Comparisons

Miles City, MT

The average comparability of the individual sensors for Miles City was 88%. The comparability for present weather and dew point was less than expected. This assessment was subject to multiple uncontrolled variables such as observer estimates and interpolations of visibility, sky cover, etc. IFR and MVFR conditions occurred at Miles City during 3 hours out of a total of about 669 hours. Analysis shows that visibility comparability was less than expected during these conditions. For the range of zero to two miles, the ASOS agreed with the human observer within the specified limits, 6% of the time; in the range above two miles through four miles the agreement was 84%; while at five miles the ASOS agreed with the human observer 50% of the time.

Visits since 22 July 1998

This page was updated on 06/03/99.

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