NIST now offers a new remote calibration service designed to assist laboratories who maintain a accurate local time standard. The service monitors the local time standard by continuously comparing it to the national time standard, and reports the comparison results to the customer in near real-time. This new service, called the NIST Time Measurement and Analysis Service or TMAS, works by making simultaneous common-view measurements at NIST and at the customer¿s laboratory of up to eight Global Positioning System (GPS) satellites. Each customer receives a time measurement system that performs the measurements and sends the results to NIST via the Internet for instant processing. Customers can then view their standard¿s performance with respect to NIST in near real-time, using an ordinary web browser. Time is measured with a combined standard uncertainty of
calibration, frequency, GPS, measurement methods, time
and Novick, A.
The NIST Time Measurement and Analysis Service, Proc. 2006 NCSLI Conference, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=50341
(Accessed December 9, 2023)