GNSS Receiver Skyplot view

The Skyplot view displays the satellite positions, their near-term trajectories, and indications as to whether or not that satellite is considered good in a polar projection. The satellite visibility (azimuth and basic elevation cutoff) is computed from the orbit information provided by the Ephemeris Manager module.

Additionally, the blue line in the polar plot visualizes default and azimuth-dependent elevation cutoffs that one specifies using the module's Azimuth dependent cutoff property.

The plot is North-orientated: The upward vertical axis points to North. Center of the circles is the zenith (elevation angle 90°) and the outer circle shows elevation 0° (the horizon).

Traffic light colors indicate the satellite availability. The Health of Satellites group assigns the colors to health states, as follows in the table below.

The locations and current directions of movement of all selected visible satellites are projected onto this map. The dot indicates the current satellite location; the arrow indicates the movement direction. For unhealthy satellites (yellow, red) or where orbits are not available, movements cannot be displayed.

The Details group summarizes the number of all visible and available satellites as well as the basic elevation cutoff value.

Elevation cutoff in the skyplot

The blue solid line indicates the current elevation mask setting. If the blue line does not appear in form of a pure circle, the divergences from the circle depend on the settings of the module's Azimuth dependent cutoff property. The Details group gives the numerical value of the general elevation cutoff, which is the lowest value of possible cutoffs.