VBOX 3i - Page 51

Using with Local DGNSS Base Station
When the VBOX 3i is used in conjunction with a local DGNSS Base Station the positional accuracy can be improved
from the standard 3 m 95 % CEP.
There are two available Base Station options:
40 cm positional accuracy:
If the VBOX 3i is used with a RTCM v2 enabled Base Station then the positional accuracy is increased to 40 cm 95 %
CEP. The height accuracy is improved to 1 m 95 % CEP.
2 cm positional accuracy:
If the VBOX 3i has an RTK upgrade option installed and is used with a RLVBBS4RG or RLVBBS5 then the positional
accuracy is increased to 2 cm.
• Racelogic proprietary 2 cm correction (Not compatible with VB3iDR)
• CMR 2 cm correction (Trimble standard message type)
• RTCM v3 2 cm correction (RTCM standard message type) RECOMMENDED
RTCM v3 is recommended as the default RTK 2 cm correction type. This message format is a globally recognised type
and more resilient to data loss caused by radio errors.
Notes:
• RLVB3iR2G2 has a max. log rate of 20 Hz when in RTK mode.
• RLVB3iR10G10 & RLVB3iDR have a max. log rate of 100 Hz when in RTK mode.
• If the VBOX 3i is issued a coldstart command (from front panel, software or VBOX Manager) any DGPS settings
will be disabled.
Solution type lookup table
Solution Type Definition
0 None
1 GNSS only
2 GNSS DGPS (inc RTCMv2 40 cm)
https://en.racelogic.support//Product_Info/VBOX_Data_Loggers/VBOX_3i_Range/VBOX_3i_User_Guide_(All_Variants)/11_-
_VB3i_DGPS_%2F%2F_RTK
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