Sub-nanosecond ground-to-space clock synchronization for nanosatellites using pulsed optical links

Anderson, Jeremy; Barnwell, Nathan; Carrasquilla, María Cristina; Chavez, Jonathan; Formoso, Olivia; Nelson, Asia; Noel, Tyler; Nydam, Seth; Pease, Jessie; Pistella, Frank; Ritz, Tyler; Roberts, Steven A.; Serra, Paul; Waxman, Evan; Conklin, John; Attai, Watson; Hanson, John; Nguyễn, Anh Ngọc; Oyadomari, Ken; Priscal, Cedric; Stupl, Jan; Wolf, Jasper; Jaroux, Belgacem

doi:10.1016/j.asr.2017.06.032

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Cited by 7 publications

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“…Vastly longer distances have been demonstrated with satellite-based FSO time transfer methods. Sub-nanosecond timing has been achieved by bouncing optical pulses off of nanosatellites [15]. The pulse-based T2L2 and direct intensity-detection-based ELT methods have achieved 10 ps timing wander over a day [16,17].…”

Section: Introductionmentioning

confidence: 99%

Time Synchronization Over a Free-Space Optical Communication Channel

Khader

Bergeron

Sinclair

et al. 2018

2018 IEEE International Frequency Control Symposium (IFCS)

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Free space optical (FSO) communication channels are typically used to transmit high-speed data between sites over the air. Here we repurpose an FSO digital communication system and use it directly for two-way time transfer. We demonstrate real-time synchronization between two sites over a turbulent air path of 4 km using binary phase modulated CW laser light. Under synchronization, the two sites exhibit a fractional frequency deviation below 𝟏𝟎 −𝟏𝟓 and a time deviation below 1 picosecond at averaging times of seconds to hours. Over an 8-hour period the peak to peak wander is 16 ps.

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Section: Introductionmentioning

confidence: 99%