TerraStar correction services are delivered globally to end users over 7 geostationary L-band satellites operated by INMARSAT. The TerraStar L-Band frequencies used by these satellites will be changing starting March 15, 2018. To facilitate a seamless transition for TerraStar users, the L-Band frequency changes will happen in two stages.
Stage 1 is scheduled to start by mid-March 2018 and includes beams 98W, AORE and 143.5E. Stage 2 is scheduled to start by August 15, 2018 and will include the remaining beams POR, AORW, 25E and IOR.
With the start of Stage 1, the updated L-Band beam tables will be periodically broadcast across all beams. TerraStar users can verify the frequency change by checking the LBANDBEAMTABLE log, which will report the new beam frequency for the affected beams. At the end of each stage, TerraStar correction signals will no longer be broadcast on the old frequencies.
TerraStar users are strongly recommended to turn on L-Band tracking for several hours for the receiver to get the new L-Band beam tables and update the stored L-Band frequencies. Receivers with non-compatible firmware will not be able to track the TerraStar L-Band signal on the new frequencies. Please see our earlier L-band tracking service bulletin, for information on compliant firmware versions:
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