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Space Network Time Distribution and Synchronization Protocol Development for Mars Proximity LinkTime distribution and synchronization in deep space network are challenging due to long propagation delays, spacecraft movements, and relativistic effects. Further, the Network Time Protocol (NTP) designed for terrestrial networks may not work properly in space. In this work, we consider the time distribution protocol based on time message exchanges similar to Network Time Protocol (NTP). We present the Proximity-1 Space Link Interleaved Time Synchronization (PITS) algorithm that can work with the CCSDS Proximity-1 Space Data Link Protocol. The PITS algorithm provides faster time synchronization via two-way time transfer over proximity links, improves scalability as the number of spacecraft increase, lowers storage space requirement for collecting time samples, and is robust against packet loss and duplication which underlying protocol mechanisms provide.
Document ID
Document Type
Conference Paper
External Source(s)
Woo, Simon S.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Gao, Jay L.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Mills, David
(Delaware Univ. Newark, DE, United States)
Date Acquired
May 26, 2015
Publication Date
April 25, 2010
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking
Meeting Information
SpaceOps Conference 2010(Huntsville, AL)
Distribution Limits
In Situ Time Distribution

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