About the SA Java Applet This applet simulates the SA signal using one of the set of parameters published in a paper. The model starts with white noise and combines that with a linear combination of the recently produced SA values. Since it is based on noise inputs, even if this was the model which the satellites implement, and even if you knew the exact parameters of it, you still would not be able to use this model to predict future SA values. This brings up a window showing the value of SA by time. Press step to bring up the next page-full in the series.
Vertical scale is one meter per pixel.
You can set the time scale . 1 means one second per pixel, so one minute is 60 pixels. SA varies too slowly for this screen to be very interesting. With a value of 10, ten minutes is 60 pixels. At this scale, you can clearly see the cycles that SA goes through.