How To Generate Sbas Corrections - R&S SMW-K44 User Manual

Satellite Navigation
Pseudorange calculation
The pseudorange τ
τ = ρ
SV
Where the range ρ
ρ = √[(x
SV
The SV position (x
the long-term corrections (Δx
x = x
SV
SBAS correction impact on the logged data
SBAS corrects the pseudorange, satellites and receiver position values. If data logging
is used, the logged values include the corrections. The logged data can deviate from
the expected not corrected parameters.

13.3 How to Generate SBAS Corrections

Activating SBAS
► Select "System Configuration > Systems&Signals" > "SBAS (e.g. EGNOS) > On".
Generating SBAS correction automatically to augment current signal errors
1. For GPS satellites, change the satellite's clock and orbit parameters in the broa-
casted navigation message to simulate signal errors.
For example, define a satellite's clock error for the a
Δa
2. Enable SBAS.
User Manual 1178.6379.02 ─ 01
is a function of the range ρ
SV
+ Δρ + ΔIono + ΔTropo
SV SV SV
is:
SV
2
- x ) + (y - y
RX SV RX SV
, y , z
SV SV SV
+ Δx
eph LT_corrections
= a - a
f0 f0,simulated f0,broadcasted
How to Generate SBAS Corrections
and the corrections:
SV
- Δt
.
SV SV
2 2
) + (z - z ) ]
RX SV
) is the sum of the ephemeris position (x
, Δy
LT_corrections LT_corrections
SBAS Corrections
, y
eph eph
, Δz
), for example.
LT_corrections
parameter:
f0
, z ) and
eph
138