Satellites currently in view are shown at their respective positions on a satellite constellation diagram. The outer circle of the constellation diagram represents the horizon, the inner circle represents 45° above the horizon, and the center point shows the position directly overhead. Each satellite is represented by a satellite icon containing the Pseudo-Random Noise (PRN) number (i.e., satellite identification number).

The 'Sensor Status' Page can be helpful in troubleshooting weak (or missing) signal levels due to poor satellite coverage or installation problems. As the GPS receiver locks onto satellites, a signal strength bar is displayed for each satellite in view, with the appropriate satellite PRN number (01-32 or 33-64 for WAAS) below each bar and inside each satellite icon. A "D" indicator in or above the signal strength bar indicates that satellite is processing a 3D Differential GPS Solution which provides a more reliable and accurate positioning solution. The progress of satellite acquisition is shown in three stages, as indicated by signal bar appearance:

• Hollow bar/icon—Receiver is looking for the indicated satellite

• White bar/icon—Satellite is ready to be used for the GPS solution

• Gray bar/icon—Receiver has collected the necessary data and the satellite signal can be used

• Green bar/icon—Satellite is being used for the GPS solution