Specifications

User InterfaceGPS and Assisted GPS
49Operating Manual 1171.5248.12 ─ 15
Table 3-1: Ephemeris Parameters
Parameter Descritpion SCPI command
Code on L2 Type of code for L2; This value does not have
any impact on the actual used ranging code of
the generated satellite.
The used "Ranging Code" is set in the "Satel-
lite Configuration" menu.
●
"Reserved"
Reserved for future use.
●
"P Code ON"
Carrier L2 (f_L2= 1.2276 GHz) is modu-
lated by P-code (BPSK).
●
"C/A Code ON"
Carrier L2 (f_L2= 1.2276 GHz) is modu-
lated by C/A-code (BPSK).
[:SOURce<hw>]:BB:GPS:SVID<st>:
NMESsage:CLTMode on page 105
L2 P Data Flag Use of carrier L2 P data flag
This value does not have an impact on
whether really data is transmitted on the sat-
ellite's carrier L2 or not.
[:SOURce<hw>]:BB:GPS:SVID<st>:
NMESsage:FIFLag on page 108
Fit Interval
Flag
Indicates the curve-fit interval used by the CS
(Control Segment) in determining the ephem-
eris parameters
[:SOURce<hw>]:BB:GPS:SVID<st>:
NMESsage:FIFLag on page 108
SV accuracy /
URA Index
[:SOURce<hw>]:BB:GPS:SVID<st>:
NMESsage:URA on page 115
SV Health This value does not have an impact on the
actual health status of the generated satellite.
[:SOURce<hw>]:BB:GPS:SVID<st>:
NMESsage:HEALth on page 108
IODC Issue of Data, Clock
[:SOURce<hw>]:BB:GPS:SVID<st>:
NMESsage:IODC on page 109
IODE Issue of Data, Ephemeris
[:SOURce<hw>]:BB:GPS:SVID<st>:
NMESsage:IODE on page 109
M_0
Mean Anomaly at Reference Time
(1)
[:SOURce<hw>]:BB:GPS:SVID<st>:
NMESsage:MZERo on page 110
Delta_N Mean Motion Difference From Computed
Value
(1)
[:SOURce<hw>]:BB:GPS:SVID<st>:
NMESsage:NDELta on page 110
e
Eccentricity
(1)
[:SOURce<hw>]:BB:GPS:SVID<st>:
NMESsage:ECCentricity on page 107
SQRT(A)
Square Root of the Semi-Major Axis
(1)
[:SOURce<hw>]:BB:GPS:SVID<st>:
NMESsage:SQRA on page 113
OMEGA_0 Longitude of Ascending Node of Orbit Plane
at Weekly Epoch
(1)
[:SOURce<hw>]:BB:GPS:SVID<st>:
NMESsage:OZERo on page 112
1
)
As this parameter affects the satellite's orbit,
the value selected here also has an impact on
the satellite's parameters "Time Shift", "Dop-
pler Shift" and "Duration (Eleva-
tion>2.5/5/7.5/10°)".
The value of these parameters will be updated
automatically.
Navigation Message Configuration