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Using GPS Receiver 1PPS Output to Verify Time Stamp Accuracy and Measure Propagation DelayA simple pulse overlay circuit using a logic OR gate was developed to overlay a precise leading edge 1 pulse per second time reference marker from a global positioning system receiver onto a non-return -to- zero-level pulse code modulation telemetry data stream to validate time stamp accuracy and measure propagation delay in telemetry equipment.




Document ID
20190028909
Acquisition Source
Armstrong Flight Research Center
Document Type
Technical Memorandum (TM)
Authors
Knudtson, Kevin
(NASA Armstrong Flight Research Center Edwards, CA, United States)
Moreno, Antonio
(Arcata Associates, Inc. Las Vegas, NV, United States)
Date Acquired
August 12, 2019
Publication Date
July 1, 2019
Subject Category
Communications And Radar
Report/Patent Number
AFRC-E-DAA-TN70602
NASA/TM-2019-220231
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
time stamp offset
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