DATA SHEET

CHECK ALSO

nusar info website:

http://www.gmv.com/en/space/nusar

CONTACTnusar@gmv.com

Feature name Data

Modes of OperationOnlineOffline

Data Acquisition

Supported modulations

BPSKBOC(1,1)

CBOC(6,1,1/11)

Supported bands

Supported constellations

E1-L1

Real time processing GPS L1Galileo BOC(1,1)

GPSGalileo

Platform

Input

Laptop

Flexibility APIs allow external algorithms

Front-end via USB Data files

OutputSignal processing

measurements

© GMV, 2012

A product by

nusar

MULTICONSTELLATION SIGNAL PROCESSOR

GPS & GALILEO

WHAT IS nusar?

nusar (Navigation User SoftwAre Receiver) is a flexible platform developed by GMV, which allows processing GNSS open service signals in real time.

nusar supports all GPS and Galileo open service signals, including the new Galileo CBOC(6,1,1/11) modulation. In addition, GPS L1 C/A and Galileo BOC(1,1) modulations can be processed in real time.

nusar provides the means to design and evaluate the performance of state of the art algorithms for processing the incoming signals due to its high extent of configurability, without the limitation of the slow speed of the legacy GNSS software solutions. nusar has also been used to track GIOVE-B Signal In Space during the Galileo in-orbit demonstration phase,as well as the first Galileo signals transmitted by the first Galileo IOV satellites.

MAIN FEATURES

nusar runs on a laptop and it can be connected to a (wideband or narrowband) front-end and antenna.

nusar provides a set of APIs that ease up the implementation of the algorithms and the creation of inspection points.Having the signal processing part implemented in software grants the platform the flexibility required to rapidly implement a given algorithm and assess the impact on performance.

nusar is able to process the following GNSS Open Service signals in the E1-L1 band:

· GPS L1 C/A and Galileo BOC(1,1) in real time · Galileo CBOC(6,1,1/11) with good performances · Both data and pilot channels for Galileo

nusar supports three modes of operation:

· Online: Real-time processing of data received directly from the front-end and antenna components; · Offline: Off-line processing of data stored in a data repository; · Data Acquisition: Data collection and recording for later processing in offline mode.

KEY ADVANTAGES

nusar provides the environment to support the design, dimensioning, benchmarking and validation of new algorithms with very low cost, through simple API definitions.

nusar outputs code delay, carrier phase and Doppler measurements for all open service signals, as well as CN0, lock time and correlators’ information

USE CASES

nusar has been used to track GIOVE-B and the first Galileo satellite only by uploading the corresponding PRN file using the nusar friendly Graphical User Interface.

In December 2011, nusar tracked the first Galileo signal transmitted from Galileo PRN 11. Both data and pilot components were tracked in two separate channels for an elevation angle of about 70 degrees.

The following figure shows the tracking results for Galileo PRN 11 data component (E1-B).

Furthermore, nusar is able to process data from srx10 front-end, fully developed by GMV.

The following figure shows the tracking results for Galileo PRN 11 pilot component (E1-C).