R&S SMW-K44 User Manual page 56

Satellite Navigation
"Manual"
Remote command:
[:SOURce<hw>]:BB:GNSS:SV:SELection:MODE
Earth Obscuration References ← SV Selection Criteria
Selects how the behavior of earth obscuration is defined. This also defines the horizon,
which is the reference line for applying the elevation mask angle, see
Figure 8-2: Impact of the Earth Obscuration References on the area of visible satellites (XY cut)
A = "Local Horizon"
B = "Earth Tangent"
α = "Earth Obscuration Offset" applied relative to the selected horizon
h = "Receiver > Positioning Configuration > Altitude"
r = Nadir (an imaginary vertical line that connects the location and the center of the earth)
1a = Horizon line for "Altitude = 0 m" (identical for both elevation mask types)
1b = Area of visible satellites (identical for both elevation mask types)
2a = Horizon line for "Altitude = h, km"; the horizon is parallel to the horizon with "Altitude = 0 m"
2b = Area of visible satellites
3a = Horizon lines for "Altitude = h, km"; the horizon lines are tangential to the earth surface
3b = Area of visible satellites
Use the "Signal Monitor" view to observe the current satellite constellation.
The figures in
"Altitude = 200 km" with "Earth Obscuration Offset = 5°". The number of active satel-
lites changes because of the different elevation mask types.
User Manual 1178.6379.02 ─ 01
The automatic satellite's constellation configuration is deactivated.
Change the state of an SV ID to change the satellite constellation
manually. Any SV ID, incl. satellites that are currently invisible, can be
activated.
Table 8-3 show the satellite constellations as seen by receiver at an
Satellite's Constellation
Satellites Settings
on page 254
Figure 8-2.
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