4 SBF Reference
PosCovCartesian
Number:
5905
"OnChange"
interval: default PVT output rate (see 4.1.8)
This block contains the elements of the symmetric variance-covariance matrix of the position
expressed relative to the Cartesian axes of the coordinate system datum requested by the
user:
σ
2
x
σ
xy
σ
xz
σ
xb
σ
yx
σ
2
y
σ
yz
σ
yb
σ
zx
σ
zy
σ
2
z
σ
zb
σ
bx
σ
by
σ
bz
σ
2
b
This variance-covariance matrix contains an indication of the accuracy of the estimated
parameters (see diagonal elements) and the correlation between these estimates (see
off-diagonal elements). Note that the variances and covariances are estimated: they are not
necessarily indicative of the actual scatter of the position estimates at a given site.
The position variance results from the propagation of all pseudorange variances using
the observation geometry. The receiver implements a stochastic error model for individual
measurements, based on parameters such as the C/N
0
, the satellite elevation, the pseudor-
ange type, the URA of the broadcast ephemeris and the ionospheric model.
If the ellipsoidal height is not estimated (2D-mode), all components of the variance-
covariance matrix are undefined and set to their Do-Not-Use value.
Parameter
Type Units
Do-Not-Use
Description
Sync1
c1
Block Header, see 4.1.1
Sync2
c1
u2
ID
u2
Length
u2
1
byte
u4
0.001
s
4294967295
Receiver time stamp, see 4.1.3
u2
1
week
65535
Mode
u1
Bit field indicating the GNSS PVT mode, as follows:
Bits 0-3: type of PVT solution:
0:
Error
field indicates the
cause of the absence of the PVT solution)
1:
Stand-Alone PVT
2:
Differential PVT
3:
Fixed location
4:
RTK with fixed ambiguities
5:
RTK with float ambiguities
6:
7:
moving-base RTK with fixed ambiguities
8:
moving-base RTK with float ambiguities
10:
Precise Point Positioning (PPP)
12:
Reserved
Bits 4-5: Reserved
Bit 6:
Set if the user has entered the command
and the receiver is still in the process of de-
termining its fixed position.
Bit 7:
2D/3D flag: set in 2D mode (height assumed constant and not
computed).
389
Summary of Contents for PolaRx5TR
Page 1: ...PolaRx5TR Reference Guide Applicable to version 5 5 0 of the Firmware ...
Page 73: ...3 Command Line Reference Chapter 3 Command Line Reference 73 ...
Page 130: ...3 Command Line Reference COM1 gim CR R gim IonosphereModel off COM1 130 ...
Page 237: ...3 Command Line Reference COM1 237 ...
Page 279: ...3 Command Line Reference COM1 279 ...
Page 294: ...4 SBF Reference Chapter 4 SBF Reference 294 ...