Co-locating DORIS with other techniques has been an ongoing objective throughout the network’s development. This effort has focused on two types of co-location: co-location with other space geodesy techniques, and co-location with tide gauges.
The aim of these co-locations is multiple: obtain information on site stability prior to installation, contribute to the ITRF combination, contribute to the sea level monitoring, compare observations, and improve the DORIS system performance (e.g. observe the beacon oscillator error through DORIS-GNSS ground stations coupling).
We draw up an inventory of current co-locations, show the progress made and highlight the benefits of co-location through a few examples of results.
We explain the technical difficulties involved and the requirements to be met in order to take full advantage of these co-locations.
Finally, we present the outlook for co-location regarding the DORIS network in the coming years.