Javad JNSGyro-4T, Operator'S Manual

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1-2 JNSGyro-4T Operator’s Manual www.javad.com
I N T R O D U C T I O N
Overview
1
Overview
Javad Navigation System's JNSGyro-4T (Figure 1-1) is the first and the only
dual frequency satellite-based attitude system. If you ever doubted the reliability
of GPS attitude systems, it was because you used single frequency systems. The
effective 86 cm dual frequency wave length (compared to 19 cm of single
frequency) makes JNSGyro-4T the most reliable and the fastest-to-settle
attitude system in the world.
JNSGyro-4T is actually four 20-channel geodetic quality dual frequency GPS /
GLONASS receivers packaged in one small box that is in turn connected to four
antennas. The dual frequency code and carrier data from four antennas are
processed to determine the three orientation angles and three-dimensional
position up to 20 times per second. The JNSGyro-4T can also be operated in
RTK or DGPS mode from an external base station to provide highly accurate
position and velocity.
Figure 1-1. JNSGyro-4T
The JNSGyro-4T can receive and process L1 and L2 signal. The GNSS
component of JNSGyro-4T means you can access both the GPS (Global
Positioning System) satellites of the United States, and the GLONASS (Global
Navigation Satellite System) satellites of the Russian Federation, increasing the
number of satellites your board can detect, thus improving the accuracy of your
measuring points, increasing productivity, and reducing cost.