Comment on White Rabbit makes leap for time over fiber by Benjamin LIN

['Tracy Cozzens', '.Wp-Block-Co-Authors-Plus-Coauthors.Is-Layout-Flow', 'Class', 'Wp-Block-Co-Authors-Plus', 'Display Inline', '.Wp-Block-Co-Authors-Plus-Avatar', 'Where Img', 'Height Auto Max-Width', 'Vertical-Align Bottom .Wp-Block-Co-Authors-Plus-Coauthors.Is-Layout-Flow .Wp-Block-Co-Authors-Plus-Avatar', 'Vertical-Align Middle .Wp-Block-Co-Authors-Plus-Avatar Is .Alignleft .Alignright'] Comments for GPS World 2021-09-13 23:15:56

Seven Solutions sets new record for long-distance White Rabbit high-accuracy time-over-fiber linkThe White Rabbit link has an approximate distance of 1,350 km (840 miles) and was deployed in collaboration with Optiver U.S., a financial company, to connect Chicago and New Jersey trading locations. Their technology integrates the White Rabbit protocol, the basis for the new high accuracy profile in the IEEE 1588-2019 (PTPv2.1). In the second location, the local GNSS reference was compared to the remote time reference originating from New Jersey through the long-distance White Rabbit link. This does not represent the real White Rabbit link error but indicates the limitation of using GNSS receiver to accurately measure the link accuracy. As can be estimated from the measurements, the previous test and the GNSS specifications, the White Rabbit link maintains an approximately ±1 ns precision.