Accession Number : AD0719004

Title :   Field Test and Evaluation of the NAS en Route Stage A Model 1b Weather Subsystem.

Descriptive Note : Final rept. Feb-Nov 69,

Corporate Author : NATIONAL AVIATION FACILITIES EXPERIMENTAL CENTER ATLANTIC CITY N J

Personal Author(s) : McFann,Howard L.

Report Date : MAR 1971

Pagination or Media Count : 124

Abstract : Four Weather Outline Generators were installed in Jacksonville NAS. En Route Stage A, Model 1b environment to generate contours around radar weather clutter at two different intensity levels. The contours were processed by the radar video digitizers for transmission to the Air Route Traffic Control Centers as weather map messages. A series of technical and operational tests were run in the field to obtain performance data pertinent to the preparation of specifications for future systems. Calibration methods and trouble shooting aids were established by the test team for use by operating personnel. It was concluded that the generators were capable of producing reliable contours around the periphery of clutter without interference from aircraft signal returns. The dynamic range of the systems, when using logarithmic video inputs, was sufficient to permit contouring of weather cells from 42 to 50 dB above the radar receiver minimum discernible signal levels. Effective control of weather map data rates was achieved by a sampling and interleaving technique that transmitted outer contour data every 8.4 degrees and inner contour data every 2.1 degrees. (Author)

Descriptors :   (*AIR TRAFFIC CONTROL SYSTEMS, METEOROLOGICAL RADAR), (*DATA PROCESSING, VIDEO SIGNALS), (*RADAR CLUTTER, INHIBITION), PLAN POSITION INDICATORS, WEATHER, RADAR REFLECTIONS, SIGNAL GENERATORS

Subject Categories : Air Navigation and Guidance
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE