OXTS Survey+ v3, Руководство пользователя

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16
Oxford Technical Solutions
Common specifications
Table 4. common specifications
Parameter Specification
Calculation
latency
3.5 ms
Operating
temperature
1
-10° to 50 °C
Vibration 0.1 g 2 /Hz 5–500 Hz
Shock survival 100
g
, 11 ms
Internal storage 32 GB
1 The operating temperature range for the antenna is much wider since it can be mounted outside the vehicle.
See specification below.
Notes on specifications
To achieve full accuracy in real time, the products will require appropriate
differential corrections where applicable, either from a base station or with a TerraStar
licence. Alternatively, a RINEX file can be downloaded post-mission and used to post-
process the data to full accuracy.
For the TerraStar service, at least 30 minutes of open-sky condition may be required
before full accuracy is achieved. This service can easily achieve this accuracy in airborne
applications.
The “1

” specification has been used for parameters where offset cannot be measured by
the , for example position (the offset of the base station cannot be found by the
alone). The “RMS” specification was used where the offset is known, for
example velocity. For angles and measurements derived from the angles, the “1  ”
specification is used because the mounting of the compared to the vehicle gives
an offset the cannot measure.
The accuracy of the product will depend on the operating mode of the GNSS.
Heading accuracy
The heading accuracy that can be achieved by the dual antenna system in the ’s
in Table 3 is 0.2° 1σ per metre of separation in ideal, open sky conditions. The system
can provide these accuracies in static and dynamic conditions. A four-metre separation is
required to reach the accuracy listed in Table 3. The maximum recommended separation
is five metres, at which it may be possible to achieve better accuracy than that listed if the
structure is rigid, including temperature variation.