GPS NOTAM

[MD83FO]

Hello all
How do you interpret this NOTAM?

GPS RAIM PREDICTION FOR:
TSO-C129 FAULT DETECTION
NO GPS RAIM OUTAGES
TSO-C146A FAULT DETECTION ONLY
NO GPS RAIM OUTAGES
TSO-C146A FAULT DETECTION WITH EXCLUSION
1802161710/1802161720
1802171705/1802171716
GPS RAIM UNAVAILABLE FOR RNP APPROACH

[andmiz]

FDE's not available for the times listed. Depending on your class of GNSS equipment (TSO 129, 145, 146a) will govern approach and alternate requirements. Typically FDE relevant to alternate aerodrome considerations.