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Reminder: Starting November 2, changes to the availability of ASG-EUPOS system services

30.10.2026

ASG-EUPOS banner

Following up on the information from July 29, 2026, we would like to remind you of changes to the availability of ASG-EUPOS system services. Currently, the ASG-EUPOS system offers RTN and RTK services, including 11 RTN measurement streams and approximately 360 RTK streams.

The table showing the available RTN and RTK streams in the ASG-EUPOS system prior to the changes on November 2.

Table

Changes Effective November 2, 2026

As of that date, correction data streams from individual physical stations provided in the RTCM 2.3 and 3.1 formats, as well as occasionally used legacy RTN data streams containing only correction data for GPS or GPS and GLONASS systems, will be disabled.

Below is a table of streams available after November 2, 2026.

The table showing the RTN and RTK data streams in the ASG-EUPOS system following the changes on November 2.

Table

RTN Services

If you have been using the following streams: RTN_MAC_3_1, RTN_FKP_3_1, RTN_VRS_CMRx, NAWGEO_VRS_3_1,  NAWGEO_MAC_3_1, NAWGEO_VRS_CMR, and have a receiver that tracks 3 or 4 GNSS systems—GPS/GLO/GAL/BDS—they should switch to the RTN4G_VRS_RTCM32 stream. If you have been using the above-mentioned streams and have a dual-system GPS/GLONASS receiver, you should switch to the stream: RTN_VRS_3_1.

An illustration showing how to change RTN data streams. A block diagram comparing the current GNSS data streams, the systems supported by the receiver, and the recommended data streams.

RTK Services

If you have been using streams from individual physical stations—such as xxxx_RTCM_3_1 or xxxx_RTCM_2_3 (e.g., KATO_RTCM_2_3)—and have a receiver that tracks 3 or 4 GNSS systems: GPS/GLO/GAL/BDS, they should switch to the stream: RTK4G_MULTI_RTCM32 or to streams from individual physical stations in RTCM 3.2 format: xxxx_RTCM_3_2. If you have been using the above-mentioned streams and have a dual-system GPS/GLONASS receiver, you should switch to the stream that automatically selects the nearest physical station: NAWGEO_POJ_3_1.

An illustration showing how to make changes to RTK data streams. A block diagram comparing the current GNSS data streams, the systems supported by the receiver, and the recommended data streams.

Due to the software manufacturer’s planned discontinuation of support for correction data transmission in the RTCM 2.3 format, it will be necessary to disable this format within the ASG-EUPOS system services. A new, clear table of available data streams for RTN and RTK measurements will make it easier to select the appropriate stream tailored to the capabilities of your GNSS equipment and help avoid problems associated with using the wrong correction stream.

Important: As of January 1, 2027, no RTK/RTN data streams in the RTCM 2.3 format will be available, and receivers that cannot support the newer RTCM 3.x formats must be replaced in order to continue using the ASG-EUPOS system services.

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