IERS Station list

ASCII file of the list of stations having a DOMES number:       iers_sta_list.txt

The initial definition of the IERS network

The IERS network was initially defined through all tracking instruments used by the various individual analysis centers contributing to IERS. Therefore, all SLR, LLR and VLBI systems were included. Then, GPS stations from IGS were added as well as DORIS tracking network.

The network also included, since its inception, a selection of ground markers, specifically those used in case of mobile equipments and those currently included in local surveys performed for monitoring local eccentricities between instruments in case of collocation sites or for site stability checks.

Each point is currently identified by the attribution of a DOMES number. The explanation of the DOMES numbering system is given below.

Neighboring points are clustered into a site. The current rule is that all points which could be linked by a collocation survey (up to 30 km) should be included into a single site of the IERS network having a single DOMES site number.

Co-locations

In the frame of IERS, the concept of co-location can be defined as the fact that two instruments simultaneously or sequentially occupy very close locations which are very precisely surveyed in three dimensions. In more details, several cases can be of interest:

• simultaneous or non simultaneous measurements
• instruments referring to the same technique or not