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gatexfer-4.ucar is a NTP system at UCAR. Since it is reached via the satellite link, it will have a large and varying delay, and is just a crude reference.
LOCAL is the local system clock, which is being synchronized to the remote systems. A host with a "*" in the first column is the current synchronization host. Systems with a "+" are considered good candidates for synchronization. Systems with a "-" are considered less trustworthy.