T Index Product	Application
Monthly T Indices	These T Indices apply when you are making a prediction using ASAPS or the on line tools and are planning to use the prediction later on (ie on a monthly basis). These predictions will not account for ionospheric storms.
Real Time T Indices	These T Indices apply when you are making a prediction using ASAPS or the on line tools and are using it immedi ately. These indices will fluctuate as they are based on real time foF2 measurements and will account for ionospheric storms.