Ground implementation (update June 2021):

Airborne implementation (update 2 December 2020):


Data link network operational status – update October 2021

Overall provider abort rate

The Overall Provider Abort Rate figure above shows the PA rate aggregated for all ANSPs providing data to LISAT. The target value is 1 PA per 100 hours CPDLC (shown as a dashed line on the graph below). The overall average rate for June 2021 was 4.5 PAs per 100 hours.

Information provided by the Network Manager Data Link Operational Status Report, updated monthly.

Technical round trip delay

The Technical Round Trip Delay figure above shows the 95th and 99th percentiles of the technical round trip delay . It represents the delay between the time when a message is uplinked and the time when the ground system receives the corresponding application level acknowledgement (aggregated for all systems providing data to LISAT). As agreed during DPMG8, the TRTD is now computed taking into account downlinked ERROR messages (DM62). This has resulted in an increase of the 99th percentile value..

Information provided by the Network Manager Data Link Operational Status Report, updated monthly.

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