race result AG
Joseph-von-Fraunhofer-Straße 11, 76327 Pfinztal
Germany
+49 (721) 961 409 01
https://www.offgridtec.com/generatoren/solarmodule/offgridtecr-50w-mono-12v-
- provides better reserves for bad weather
Time Synchronisation
The Track Box (Passive) has 2 methods for syncrhonisation of the internal clock, Track
Boxes are always synchronised to UTC time and the time recorded in your event file will be
based on the event time zone. The Track Box will continuously micro-adjust the time using
either method to ensure the time is always as accurate as possible.
GPS Time
The Track Box will primarily use the on-board GPS module to syncrhonise to GPS time, this
will provide the most accurate time in all scenarios. Leap Seconds will be automatically
accounted for by the firmware to the current default.
NTP Time
In the event that GPS time cannot be retrieved then the box will next attempt to sycnhronise
using NTP through GSM. In this case the Track Box will attempt to communicate with 3
different NTP servers to maximise the precision. If the variation between different NTP
servers is too great, which may be caused by weak GSM signal and communication
delays, the box will continue to communicate with the NTP servers until an accurate time
can be achieved.
Detection Algorithms
Passive Transponders
Reaction Time & Dead Time
the Track Box (Passive) uses a detection algorithm
to maximise the accuracy of recorded times.
, which by default are set
differently on Track Boxes due to their design.
The default Reaction Time is 10 seconds, the reason for this is that with antennas mounted
to the side there is much greater chance of early detections, particularly if the Track Box is
facing participants. A low reaction time may result in a less accurate time being recorded, by
increasing this to 10 seconds it provides greater chance to record an accurate time. This
