Spectra Precision Survey Pro v4.5 Recon and Nomad Reference Manual - Manual (Page 111)

Job Menu – GPS Module
R-103
When checked, both the data and Offset Shots screens will
automatically accept points once the measurement is better than the
specified criteria. Data collection routines will always collect at least
5 seconds worth of data before automatically accepting points based
on criteria.
Epoch Averaging : is where you set a number of epochs to average in
Survey Pro. If this number is greater than one, Survey Pro will use
the number of epochs specified to calculate the final position using a
simple (non weighted) average.
Note: This function is not appropriate for every receiver. Some
receivers, when dynamics are set to ‘static’, use Kalman filtering and
other superior techniques to calculate an average position. In this
case, the position returned from the receiver is better with each epoch
and you may actually degrade your result by averaging with Survey
Pro. You should check with your receiver manufacturer for specific
recommendations on field procedure.