Atmosphere; Tropospheric └ Ionospheric Model - R&S SMW-K44 User Manual

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Atmosphere

Comprises the parameters for adjusting the ionospheric and tropospheric models of
the simulation.
The selected model defines the ionospheric and tropospheric models used in the satel-
lite-receiver channel simulation.
See also
Tropospheric Model ← Atmosphere
Sets the tropospheric model used in the satellite-receiver channel simulation.
The troposphere is the lower atmosphere layer that comprises rain, snow, clouds, etc.
and affects the GNSS signals propagation. The GNSS signals experience a variable
path delay, caused mainly by the dry atmosphere.
"STANAG"
"MOPS-DO-229D"
Remote command:
[:SOURce<hw>]:BB:GNSS:ATMospheric:TROPospheric:MODel
Ionospheric Model ← Atmosphere
Sets ionospheric model used by the channel simulation.
The selected model applies for all satellites, irrespectively to the navigation standards
they belong to.
"Klobuchar"
"NeQuick"
User Manual 1178.6379.02 ─ 01
Ionosphere................................................................................................... 113
Ionosphere.................................................................................................. 114
Ionosphere.................................................................................................... 114
Values................................................................................................... 114
"Tropospheric and ionospheric models"
A tropospheric model described in the NATO Standard Agreement
STANAG 4294 Issue 1.
The minimum operational performance standard (MOPS) is a tropo-
spheric model used by the SBAS systems.
The model is based on a mapping function or wet and dry tropo-
sphere.
Klobuchar is the correction model used by GPS.
Although the Klobuchar algorithm estimates the ionospheric delay in
the GPS L1 frequency signal, it can be also used for delay estima-
tions for any GNSS signal.
See "Klobuchar Parameters"
NeQuick is the correction model proposed by Galileo, but the iono-
spheric corrections computed by the NeQuick can be used for any
GNSS signal.
NeQuick is a 3D time-dependent ionospheric electron density model.
It provides electron density in the ionosphere as a function of the
position (longitude, latitude and height), time (UTC or TOW) and the
solar activity. [1]
See "NeQuick Parameters"
Perturbations and Errors Simulation
Atmospheric Effects and Ionospheric Errors Settings
on page 102.
on page 109.
on page 110.
on page 249
108