Time % and % Location % Propagation are known as variability statistics within the tool. The % of Location and % of Time columns allow you to add path loss to the propagation model due to either fast (location) and/or slow (time) fading. Time fading is normally used in fixed links like microwave, where signal variation over time is dominant. Location fading is used in mobile environments where the fading is due to the mobile moving through obstructed areas.
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Both of these fields are statistical controls and the basis for calculating these factors is discussed in Appendix A. These values are given in percent in order to let the user easily add a path loss value that will, for example, ensure that any given location will have an actual received power at or above the predicted received power at whatever percent is listed. For example, with % of Location set to 50%, out of all the range of possible fading variations, the predicted signal level is adjusted so that 50% of the possible fading is above and below your predicted signal level.
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