This folder contains data from the NorduNET NTS White Rabbit link
between RISE(Stockholm) and MIKES(Espoo).

HDF5 file content can be viewed with: https://myhdf5.hdfgroup.org/

The files should update about once per day.

2026_NTS_data.hdf5
==================

Time interval counter data between UTC(MIKE) and WR(RISE), measured in the MIKES UTC-lab.
The measurement system measures time intervals every 10 minutes.

* D0/MJD: Time stamp in MJD
* D0/x: Time interval in s, MC-UTC(MIKE)
* D20/MJD
* D20/x: Time interval in s, MC-WR(RISE)
* DC10/MJD
* DC10/DC10: Time interval in s. Computed as D20-D0 = UTC(MIKE) - WR(RISE)
  Valid data starts around MJD 61183 (2026-05-23)
  An offset of +192.22 ns is added to the difference D20-D0, giving a value of UTC(MIKE) - WR(RISE) ca. -40 ns.

2026_NTS_wrs_monitoring.hdf5
============================

WR-Switch telemetry collected over SNMP using Telegraf:

* 146: BC at SUNET, 23 us RTT
* 138: BC at CSC, ca 5.9 ms RTT
* 139: BC/OC at MIKES, 45 us RTT

Fields:

* t: timestamp as python datetime.timestamp()
* wrsPtpRTT: round-trip-time in ps



ChangeLog for this readme.txt
=============================

* AW2026-06-17, first version