NASA Technical Reports Server (NTRS) : Phase pdf

NASA Technical Reports Server (NTRS) : Phase

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Description of the Book:

Precisely timed pulses injected into the input of each receiver are used to calibrate the phase and group delay through each interferometer terminal. The short duration pulses are generated at a 1 MHz rate directly from the output of the frequency standard. The pulses are injected into the receiver at a level low enough to produce less than one percent increase in system temperature, yet can be extracted during processing with a high enough signal to noise ratio to determine the phase of the calibration rails within 1 degree in 1 second of integration. The calibration system also includes precise cable measurement electronics and a pulse echo for clock synchronization

• Creator/s: NASA Technical Reports Server (NTRS
• Date: 7/1/1980
• Year: 1980
• Book Topics/Themes: NASA Technical Reports Server (NTRS), FREQUENCY STANDARDS, PERFORMANCE TESTS, PHASE MODULATION, PULSE GENERATORS, TIME LAG, VERY LONG BASE INTERFEROMETRY, CALIBRATING, GEODESY, TUNNEL DIODES, Rogers, A. E. E

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