Daily data

All EPN stations upload daily (24 hour) RINEX files to two EPN data centers (the primary and secondary data centre) from where they flow to the two EPN Regional data centres following a well-defined data flow scheme indicated in the Guidelines for EPN Stations and Operational Centres. In order to minimize file size, the RINEX data are Hatanaka compressed before being uploaded. Three months after the observation date, all daily RINEX data are copied to the EPN archive at ROB (EPN CB).
Once a week, the EPN Central Bureau informs the EUREF community (through the EUREF mailing list) about missing data files and meta-data inconsistencies (sample email).

Hourly data

In addition to the daily data uploads, EPN stations use the same data flow scheme to submit hourly RINEX data. The hourly EPN data are mainly used for the determination of zenith total delays in near-real time aiming at improving numerical weather predictions (E-GVAP). For these applications it is crucial that the hourly RINEX observation files are made available to the customer with latencies below 10 minutes.
The EPN CB distributes monthly (through the EUREF mailing list) an overview of the histogram of the minimal latencies of all the EPN stations (sample email).

Daily data availability

Availability of daily RINEX data (last 4 weeks): 90% < station , 80% < station < 90%, station < 80%.

Hourly data latency

Hourly RINEX data submitted with latency below 10 min. (last 4 weeks): 90% < station , 80% < station < 90%, station < 80%.