Physics
Scientific paper
Jun 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.340..445a&link_type=abstract
In ESA, Frequency and Time Forum p 445-450 (SEE N93-24978 09-70)
Physics
Crystal Oscillators, Frequency Stability, Global Positioning System, Radio Receivers, Receivers, Resonators, Time Measurement, Acceleration (Physics), Design Analysis, Frequency Standards, Mobile Communication Systems, Modulation, Optimization, Sidebands, Temperature Control
Scientific paper
The design procedure and optimization of oscillators for mobile GPS (Global Positioning System) receivers and typical results regarding the resonator's performance are presented. The GPS oscillators were designed to meet the GPS system requirements, either for time transfer or localization, in different environment. These oscillators focus either on the absolute accuracy, through low G sensitivity and high stability for the naval ones, or in the warm up, through the use of the airborne TXCO (Temperature Compensated Crystal Oscillator), which provides an accuracy good enough with low power and low size. One of the key points is that most of the applications require low oscillator size. That means that the low G sensitivity must now be achieved with a low size resonator. Significant improvements were carried on HC37 can resonators which can exhibit now G sensitivity better than 5 times 10 to the minus 10th power per G.
Aubry J. P.
Candelier V.
Canzian P.
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