caa a22 4500 606162070 CHVBK 20210128100637.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s10291-014-0377-5 doi (NATIONALLICENCE)springer-10.1007/s10291-014-0377-5 Monitoring of UTC(k)'s using PPP and IGS real-time products [Elektronische Daten] [Pascale Defraigne, Wim Aerts, Eric Pottiaux] The time transfer technique based on Precise Point Positioning (PPP) has proved to be a very effective technique allowing the comparison of atomic clocks with a precision of a hundred picoseconds, and with latency of 2days. Using satellite orbit and clock information from the IGS real-time products, it is now possible to compute very precise time transfer solutions based on PPP in near real-time, i.e., with a latency down to some minutes. We present PPP-based time transfer results obtained in near real time with the new version of the GNSS data processing software Atomium, and the satellite products mentioned above. We additionally analyze the results that can be obtained with low latency using the NRCan Ultra-Rapid products (EMU) available with a delay of 90-150min. From the statistics of the results, it is concluded that the real-time IGS products allow detection of a clock jump larger than 1.5ns after some minutes; the detection threshold falls down to 0.8ns when using the EMU products about 2h later. It is also shown that in near real time, a frequency change larger than 2e-14 can be detected when looking at the last 24h data or larger than 2e-13 when looking at the last 2h. As demonstrated, the quality of the monitoring depends on the distance between the two stations, so that distances shorter than about 3,000km should be preferably used for a near real-time comparison of atomic clocks based on PPP. Springer-Verlag Berlin Heidelberg, 2014 UTC(k) nationallicence PPP nationallicence Time transfer nationallicence Defraigne Pascale Royal Observatory of Belgium, Avenue Circulaire, 3, 1180, Brussels, Belgium aut Aerts Wim Royal Observatory of Belgium, Avenue Circulaire, 3, 1180, Brussels, Belgium aut Pottiaux Eric Royal Observatory of Belgium, Avenue Circulaire, 3, 1180, Brussels, Belgium aut GPS Solutions Springer Berlin Heidelberg 19/1(2015-01-01), 165-172 1080-5370 19:1<165 2015 19 10291 https://doi.org/10.1007/s10291-014-0377-5 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10291-014-0377-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Defraigne Pascale Royal Observatory of Belgium, Avenue Circulaire, 3, 1180, Brussels, Belgium aut NATIONALLICENCE 700 1- Aerts Wim Royal Observatory of Belgium, Avenue Circulaire, 3, 1180, Brussels, Belgium aut NATIONALLICENCE 700 1- Pottiaux Eric Royal Observatory of Belgium, Avenue Circulaire, 3, 1180, Brussels, Belgium aut NATIONALLICENCE 773 0- GPS Solutions Springer Berlin Heidelberg 19/1(2015-01-01), 165-172 1080-5370 19:1<165 2015 19 10291