The SRP Area is the incident cross sectional area to the Sun-Earth line. It is used in the calculation of the force on the spacecraft due to solar radiation pressure.
If the Spacecraft's ForceModel.SRPForceGeometry is set to use a PlateModel, then this property will reflect the incident SRP area of the PlateModel, and an error will be reported if you try to assign a value to this property.
Timing Precision Mode
This page describes functionality in nanosecond timing precision mode.
Click here to see the documentation for this object in millisecond timing precision mode.