The technology of GNSS it can be harmed by some natural phenomena, mainly solar flares and anomalous variations in the thickness of the terrestrial ionosphere. One of these phenomena is Scintillation, which seriously compromises the accuracy of the coordinates of an electronic GNSS, even more when the system is corrected by a base RTK.
One way to minimize the effect of flickering in rovers RTK is the replacement of corrections RTK paid signal (IsoPoint 3), since this type of correction uses several bases spread across the globe and manages to minimize the effect of the flicker of a certain geographical point.
The system GeoNave has the Flicker Prediction feature, through which it is possible to determine a scheduled time for the start of the daily flicker, and the time in which corrections RTK will be disabled, causing the position to be automatically corrected by the IsoPoint paid signal during this period3.
If the Flicker Prediction parameter is disabled, the Settings menu RTK is shown as in the following figure.
Pressing the edit button 
, the Scintillation Forecast configuration screen will be displayed, as shown in the image below.
Start Time
Selecting the option Period and pressing the confirm button 
, the user will be asked to configure the start time of the Flicker Forecast, through two screens of Choose Vertical, for hours and minutes, as shown in the figures below.
Hours of Operation
After configuring the start time for Flicker Forecast, the Settings screen RTK will be displayed as shown in the following image. A new field called Hours of Operation will appear, through which the user determines for how many hours, between 1 and 6, the Flicker Prediction will be effective.
Selecting the Hours of Operation item and pressing the edit button , new screen is presented Choose Vertical, to configure the number of hours of the Flicker Prediction feature, as shown in the following figure.
After configuring the number of operating hours, the Flicker Forecast will be configured, and will take effect in the determined period of time, starting from the time chosen by the user.
