u-blox ANTARIS 4, Руководство по системной интеграции

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your position is our focus
Platform Description
Stationary
Timing applications (antenna must be stationary) or other stationary applications
•
Velocity is constrained to 0 m/s
zero dynamics)
•
No process noise (assuming
Pedestrian
Applications with low accelerations and low speed, as any portable devices carried and
elerations
moved by manpower.
•
Assuming low acc
A tomotive Used for applications that can be compared with the dynamics of a u passenger car.
•
Assuming low vertical acceleration
•
Assuming low process noise
At se Recommended for applications at sea, with zero vertical velocity.
•
Assuming zero vertical velocity
a
•
Assuming low process noise
Airborne <1g Used for applications that have to handle a higher dynamic range than a car and higher
vertical accelerations.
in noise
s supp
•
Assuming
•
No 2D pos
termediate pr
ition fixe
ocess
orted
Airborne <2g d r vironment.
Assuming high process no
Recommende for a typical ai plane en
•
ise
•
No 2D position fixes supported
Airborne <4g extreme dynamic environment.
Assuming high process no
Only recommended for an
•
ise
•
No 2D position fixes supported
Table 29: Dynamic Platform odel
Note Dynamic platforms designed for high acceleration systems (e.g. AIRBORNE < 2G) may result in a
tan rd deviation the reported sition.
4.6.4 Static Hold Mode
atic Hold mode the navigation algorith to decrea the noise e pos outp hen the
velocity is ned ‘Sta ic Hold Threshold’. This reduces th on der used by
environmental issues su lications. By
default, static hold mod disabled.
Function
tic Hold Threshold’, the position is kept constant. Once the static hold
mode has been entered, the position and velocity output will kept constant, until there is evidence of movement.
Such evidence can be velocity, acceleration, changes of the valid flag (e.g. position accuray estimate exceeding
the Position Accuracy Mask, see also section 4.6.8.1 ), position displacement, etc.
In older firmware versions (<V5.0), the static hold mode was release if the speed had risen to twice the value of
the ‘Static Hold Threshold’ or if the receiver has moved significantly.
M
greater s da in po
The St allows
re-defi
ms se in th
e positi
ition
wan
ut w
ca below a p t
ch as multipath and improves position accuracy especially in stationary app
e is
If the speed goes below the defined ‘Sta
GPS Modules - System Integration Manual (SIM) (incl. Reference Design) Receiver Description
GPS.G4-MS4-05007-A1 Page 98