GIOVE-A/B Double Difference Observed

15/07/2008

Using 2 off-the-shelf GNSS receivers from Septentrio, researchers at Delft University of Technology (Netherlands), have produced the first Galileo double difference measurements from live satellite signals. Double difference measurements play a key role in RTK applications. This event paves the way for multi constellation RTK receivers.

Simultaneous visibility of both GIOVE-A and GIOVE-B during a window of more than 1.5 h allowed the researchers to collect simultaneous ranging measurements to the 2 Galileo satellites, as well as to 12 GPS satellites and 2 EGNOS satellites. The 2 AsteRx1 receivers which were set-up with a short baseline allowed to perform pure Galileo double-difference calculations. These calculations are fundamental to RTK positioning.

Besides AsteRx1TM, Septentrio also provides PolaRx3GTM, a dual-frequency L1/L5/E5a GPS/Galileo receiver that can also be configured for L2 and GLONASS signals; as well as GeNeRx1TM, a multi frequency Galileo/GPS receiver for signal validation and experimentation, which can be configured to track all Galileo signals and provide detailed measurement data and quality indicators, correlation peak samples, and other advanced information.

Caption: Artist's impression of GSTB-V2/B in orbit (courtesy ESA)

Read more about: EGNOS satellite GPS Galileo
Source: Septentrio
Supplier: Delft University of Technology

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