Quality control of the aircraft file at the NMC. Part 1
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Quality control of the aircraft file at the NMC. Part 1

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  • Description:
    "Since the GATE in 1975, observations taken aboard commercial aircraft, supplemented by observations from military and private aircraft, have become a very valuable source of upper-air data [e.g.Julian & Steinberg, 1975]. The transition from the old 'course-made- good' type of navigation to inertial and omega-type navigation instrumentation resulted in much improved wind vector data. Not only are INS-NAVAID winds much more accurate than the older computed winds, they also are essentially instantaneous, i.e.they are not averaged over legs of an aircraft's course. The development of avionics for jet aircraft also made possible the automatic recording and transmission of the meteorological information from the in-flight aircraft to a collecting site. The first such system, used extensively in GATE, recorded raw instrument output data on-board the aircraft: those data were processed on the ground after the aircraft had landed to produce meteorological reports. The quality and usefulness of data collected in this fashion was forcefully demonstrated in GATE, and led to the design and deployment of the ASDAR system during the Global Experiment. The ASDAR system, which used the data collection system on the synchronous satellites to relay the meteorological data to the collecting site, was even more successful in terms of the quantity and quality of the reports. The current follow-on to the ASDAR system and the even more complex and comprehensive ACARS represent the culmination of a highly reliable, automatic, and high quality data system"--Introduction, paragraph 1.
  • Content Notes:
    Paul R. Julian.

    "This is an unreviewed manuscript, primarily intended for informal exchange of information among NMC staff members."

    "June 1989."

    System requirements: Adobe Acrobat Reader.

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