Start Date
4-1969 8:00 AM
Description
In a program sponsored by the Air Force Cambridge Research Laboratories, Motorola has developed an Advanced Meteorological Sounding System (AMSS) for the purpose of measuring meteorological parameters at altitudes up to 150,000 feet. Although some modifications have been made in the current measuring equipment, the techniques used today are still predominantly those used twenty years ago.
It was the purpose of the AMSS to update the present system with particular emphasis on improved reliability, decreased operating costs and increased accuracies. As opposed to the present ground based meteorological tracking system, the AMSS provides a smaller and lighter radiosonde, improved ranging and telemetry accuracies, higher data rates including a continuous data channel, unambiguous ranging to 580 kilometers, digitized output data and. a solid state design throughout. Nearly all the techniques applied to the AMSS have been the result of concepts developed on the various space programs and some of the specific items which find application in the meteorological program include high power (30 watts) solid state UHF transmitters, narrow band phase lock receivers, stripline filters, a pseudo random noise ranging system, stable low cost oscillators - both crystal and multivibrator, low cost/low group delay receivers, automatic system acquisition including anti-sideband lock circuitry, PAM/FM telemetry accuracies of better than 0. 25%, and use of integrated circuits. Within this paper is outlined the Advanced Meteorological Sounding System (AMSS) and the use of the above concepts in development of such a system. It is not the intent here to cover these concepts in a rigorous technical manner, but rather outline their use as applied to the AMSS system. The research reported in this paper was sponsored by the Air Force Cambridge Research Laboratories, Office of Aerospace Research, under Contract AF 19(628)- 4215 but the report does not necessarily reflect endorsement by the sponsor.
The Advanced Meteorological Sounding System
In a program sponsored by the Air Force Cambridge Research Laboratories, Motorola has developed an Advanced Meteorological Sounding System (AMSS) for the purpose of measuring meteorological parameters at altitudes up to 150,000 feet. Although some modifications have been made in the current measuring equipment, the techniques used today are still predominantly those used twenty years ago.
It was the purpose of the AMSS to update the present system with particular emphasis on improved reliability, decreased operating costs and increased accuracies. As opposed to the present ground based meteorological tracking system, the AMSS provides a smaller and lighter radiosonde, improved ranging and telemetry accuracies, higher data rates including a continuous data channel, unambiguous ranging to 580 kilometers, digitized output data and. a solid state design throughout. Nearly all the techniques applied to the AMSS have been the result of concepts developed on the various space programs and some of the specific items which find application in the meteorological program include high power (30 watts) solid state UHF transmitters, narrow band phase lock receivers, stripline filters, a pseudo random noise ranging system, stable low cost oscillators - both crystal and multivibrator, low cost/low group delay receivers, automatic system acquisition including anti-sideband lock circuitry, PAM/FM telemetry accuracies of better than 0. 25%, and use of integrated circuits. Within this paper is outlined the Advanced Meteorological Sounding System (AMSS) and the use of the above concepts in development of such a system. It is not the intent here to cover these concepts in a rigorous technical manner, but rather outline their use as applied to the AMSS system. The research reported in this paper was sponsored by the Air Force Cambridge Research Laboratories, Office of Aerospace Research, under Contract AF 19(628)- 4215 but the report does not necessarily reflect endorsement by the sponsor.
Comments
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