Interim Runway Visual Range (RVR)/Automated Surface Observing System (ASOS) Interface Regression Operational Test and Evaluation (OT and E) Report
FEDERAL AVIATION ADMINISTRATION TECHNICAL CENTER ATLANTIC CITY NJ
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This report details results of a regression test performed on the Interim Runway Visual Range RVRAutomated Surface Observing System ASOS Interface. Testing was conducted from January 21 through 23, 1997, at Memphis International Airport MEM. Testing was intended to determine if modifications to the interface corrected problems observed during initial testing October of 1996. Testing also was designed to determine if Interim RVRASOS software performance enhancements operated in accordance with user needs and functions. Problems observed during the initial test included the following 1 ASOS Display Screen Mismatch with RVR product, 2 Interim RVRASOS Interface Boot Failure, 3 Interim RVRASOS Software Lock-Up, 4 New Generation RVR Output Rate and Interim RVRASOS Interface Software synchronization, 5 Phantom RVR products with RVR Configuration Modifications, and 6 False RVR products during RVR Sensor Calibration. Of the problems discovered during initial testing, nine were resolved as a result of modifications to the Interim RVRASOS Interface and the ASOS. It was determined that a maintenance procedure could be used to correct the remaining problem. Correction and resolution of the problems identified during initial Operational Test and Evaluation OTE indicate the Interim RVRASOS Interface and ASOS RVR functions are suitable for use in the field from an operational perspective. Proper performance demonstrated by the Interim RVRASOS Interface self-restart and illegal entry prevention features also indicate the Interim RVRASOS Interface can be used with a minimum of maintenance actions by field technicians. These developments suggest the Interim RVRASOS Interface is prepared for use at designated Long-Line RVR sites. As a result, ACT-320 recommends deployment of the interface at sites designated by the National Weather Service NWS and Federal Aviation Administration FAA.
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