Manual

ZED-F9T-Integration manual
• A minimum observation time defines the minimum observation time independent of the
actual number of fixes used for the position estimate. Values can range from one day for high
accuracy requirements to a few minutes for coarse position determination.
• A 3D position standard deviation defines a limit on the spread of positions that contribute to
the calculated mean.
Survey-in ends when both requirements are successfully met. The Survey-in status can be queried
using the UBX-TIM-SVIN message.
The timing receiver should not be fed RTCM corrections while it is in survey-in mode.
To configure a timing receiver into Survey-in mode (CFG-TMODE-MODE=SURVEY_IN), the following
items are required:
Configuration item Description
CFG-TMODE-MODE Receiver mode (disabled, survey-in or fixed)
CFG-TMODE-SVIN_MIN_DUR Survey-in minimum duration
CFG-TMODE-SVIN_ACC_LIMIT Survey-in position accuracy limit. The accuracy of given coordinates in 0.0001
meters (i.e. value 100 equals 1 cm)
Table 7: Configuration items used for setting a timing receiver into Survey-in mode
Set the configuration items shown above into flash memory to perform a survey-in
procedure automatically upon start-up.
3.1.5.4.2 Fixed position
Here the timing receiver position coordinates are entered manually. Any error in the timing receiver
position will directly translate into timing errors.
To configure into Fixed mode (CFG-TMODE-MODE=FIXED), the following items are relevant:
Configuration item Description
CFG-TMODE-MODE Receiver mode (disabled or survey-in or fixed)
CFG-TMODE-POS_TYPE Determines whether the ARP position is given in ECEF or LAT/LON/HEIGHT
CFG-TMODE-ECEF_X ECEF X coordinate of the ARP position, coordinate in centimeters
CFG-TMODE-ECEF_Y ECEF Y coordinate of the ARP position, coordinate in centimeters
CFG-TMODE-ECEF_Z ECEF Z coordinate of the ARP position, coordinate in centimeters
CFG-TMODE-LAT Latitude of the ARP position, coordinate in 1e-7 degrees
CFG-TMODE-LON Longitude of the ARP position, coordinate in 1e-7 degrees
CFG-TMODE-HEIGHT Height of the ARP position, coordinate in centimeters
CFG-TMODE-ECEF_X_HP High-precision ECEF X coordinate of the ARP position, coordinate in 0.1 millimeters
CFG-TMODE-ECEF_Y_HP High-precision ECEF Y coordinate of the ARP position, coordinate in 0.1 millimeters
CFG-TMODE-ECEF_Z_HP High-precision ECEF Z coordinate of the ARP position, coordinate in 0.1 millimeters
CFG-TMODE-LAT_HP High-precision latitude of the ARP position, coordinate in 1e-9 degrees
CFG-TMODE-LON_HP High-precision longitude of the ARP position, coordinate in 1e-9 degrees
CFG-TMODE-HEIGHT_HP High-precision height of the ARP position, coordinate in 0.1 millimeters
CFG-TMODE-FIXED_POS_ACC Fixed position 3D accuracy estimate
Table 8: Configuration items used for setting a timing receiver into fixed mode
Once the receiver is set in fixed mode, select the position format to use: either LLH or ECEF with
optional high precision (mm) coordinates compared to the standard cm value.
For example, with CFG-TMODE-POS_TYPE=ECEF the timing receiver antenna position can be
entered to cm precision using CFG-TMODE-ECEF_X, CFG-TMODE-ECEF_Y, CFGTMODE-ECEF_Z.
UBX-19005590 - R05
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3 Receiver functionality Page 14 of 87
C1-Public Early production information