navcom lab smlf (signal monitoring laboratory facility), la piattaforma tas-i per il supporto alla...
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8/14/2019 NavCom Lab SMLF (Signal Monitoring Laboratory Facility), la piattaforma TAS-I per il supporto alla verifica del segnale di Galileo
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NavCom Lab SMLF:NavCom Lab SMLF:--
verifica del segnale di Galileo.verifica del segnale di Galileo.. , . , .. , . , .
Presented by: SALVATORE CORVOresented by: SALVATORE CORVO
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Content
Overview on TAS-I NavCom Laboratory
GNSS (SMLF) Signal Monitoring Facility
Antenna
Down Converter
SMFL SISA SW CONCLUSION
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Introduction
under responsibility of B.U. Navigation &
Space Italia S.p.A.
system engineering activities in charge of TAS-I
The sco e of the NavCom Lab is twofold:
1) to support the growth of the system engineering competences in the
Navigation domain2) to represent an experimental platform for the fine tuning of the Galileo
system verification tests
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Main Objectives and Functions of NavCom Lab
Hardware Prototyping for Application development & exploitation that includes adequate tools to develop navigationhardware prototypes and to test applications at experimental stage.
The GNSS Flexible Signal In Space Simulation that is to be able to generate any type of Navigation signal taking intoaccount all the effects impacting on signal propagation from the satellite to the ADC output of the receiver.
The UERE Budget Characterization algorithms: it is designed to provide a verification platform where the UERE (UserEquivalent Range Error) budget contribution can be isolated and characterized.
The Orbit Determination Algorithms. This facility will analyze, define and implement the algorithms for the GNSS SatellitesOrbit Determination.
Augmentation and Interoperability Scenarios: Analysis, Prototyping and Tests. The activities that will be supported by theNavCom Lab are:
Systems Data Fusion, to experiment possible applications of GNSS, inertial sensors or cartographic data fusions;
Indoor Seamless Navi ation S stem IndoSenS, to develo solutions for in-door a lications of navi ation s stems
Web Portal to exchange products from TAS-I and TAS-F BUNAV Laboratories and to share any available NavCom Lab rawdata, measurements and analyses results to enabled users
The GNSS Signal Monitoring Laboratory Facility (SMLF) that has been designed to allow tracking of the GNSS satellitesfor monitoring of the RF and Code & Data characteristics of GNSS SIS implementing both real-time and post-processinganalysis of the GNSS signals received on ground.
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Overview on TAS-I NavCom Laboratory
Analysis & Algorithm Development Lab
In the Analysis & Algorithm Development Room will be implemented the
following functionalities:
6600.00 mm.x 4000.00 mm.
Stanza
C
Meteo
Station
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Overview on TAS-I NavCom Laboratory
Analysis & Algorithm Development Lab
In the Analysis & Algorithm Development Room will be implemented the
following functionalities:
System Engineering Data &Configuration Management;
UERE budget characterization;
SynchroNet;
6600.00 mm.x 4000.00 mm.
Stanza
Galileo Signal Acquisition & Tracking
algorithms;C
Meteo
Station
GNSS Bit-True Signal Simulator;
Web Portal;
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Overview on TAS-I NavCom Laboratory
Measurements & Platform Development Lab
In the Measurements & Development Room will be implemented the
following functionalities:
R
Firewall
7
5
612
11
10 8
42
1
9
3
Atomic
Clock
ER
Firewall
7
5
612
11
10 8
421
9
3
Atomic
Clock
VSG Network
Analyser
Spectrum
S
ERVE
Me
Sta
SERV
Oscilloscopio
Spectrum
Bit Grabber
Database
Steo
tion
Oscilloscopio Spectrum
Meteo
tation
GPS/GALILEO
Riceviers
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Overview on TAS-I NavCom Laboratory
Measurements & Platform Development Lab
In the Measurements & Development Room will be implemented the
following functionalities:
Signal Monitoring
In-Door Seamless Navi ation ERFirewall
7
5
612
11
10 8
421
9
3
Atomic
Clock
VSG Network
Analyser
Spectrum
System (InDoSeNS)System Data Fusion
SERV
Oscilloscopio
Spectrum
Bit Grabber
Database
S
Collection of main weatherparameters
Oscilloscopio Spectrum
Meteo
tation
GPS/GALILEO
Riceviers
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GNSS Signal Monitoring Laboratory Facility
Simultaneous operations of three independent measurement
Real-Time Signal Analysis (Green Block):-
Characterization (i.e. Spectrum of modulatedsignal Equivalent Isotropic Radiated Power(EIRP), Nominal Power Level, OccupiedBandwidth, Frequency Stability (if possible),Carrier-to-Noise Ratio C/N0, intra-band andout of band emission).
User Analysis (Blue Block): that allowsevaluation on Raw data, Navigation Messages, BER, Doppler, Cycle slips Signal quality,
Signal status, SNR,.
Post-Processing Signal Analysis (Orange Block): it allows a SW analysis in a postprocessing way. Several investigation like signal rate, Code and carrier phase, received phasenoise, are carried out.
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SMLF High Gain Steerable Antenna
The antenna system, operating in the L-Band, is an high efficient prime focus feed 5.1m-reflector- - .
antenna main reflector is a 5.1m axially symmetric parabolic surface made from Fibre Glass.
Antenna type 5.1 m parabolic antenna,rime focus
Receivefrequency L-Band 1100 1600 MHz
Polarization RHCPOverall G/ T at E5 11.5 dB/K to zenith;
. owar s or zon
Sidelobes -24 dBAxial ratio 1.8 dB max
LNA Gain 35 dB
LNA N/ F 1 dB max
Band 1.1 GHz 1.35 GHz 1.6 GHzGain 32.6 dBi 34.4 dBi 35.9 dBiB W 4 deg 3 7 deg 2 75 deg
The RF signals is amplified by a set of two cascaded low-noise amplifiers (LNA)with a total gain of 100 dB and a noise figure of 1 dB.
B.W. 4deg 3.7 deg 2.75deg
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SMLF satellite visibility analysis
The scope is to guarantee a spectra discrimination of the usefultrac e s gna a eo or w t respect to ot er sate tessatellites)
The simulations have been carried out considerin the minimumangle between the projection of two specific satellite to a fix point in
the ground corresponding to SMLF Antenna.
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SMLF satellite visibility analysis
Minimum angular distance between Galileo SV03 and the remaining SVi Galileo and GPS
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SMLF satellite visibility analysis
This analysis has been done to establish how long (in time percentage) the Galileo 5.1m antenna is able totrack a selected satellite, considering a prefixed threshold of 3 degree on the antenna beam
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SMLF satellite visibility analysis
It can be noted that, for the maximum threshold (4 [email protected] worst cases) for the Galileosystem the availability of the verification service is approximately of 96% of the visibility time and 92%
for the GPS system
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Antenna Control System
The pointing system is driven by a,
motion and the satellite tracking, with0.001 degree of resolution and an overall
accuracy of 0.02 degree
The tracking pedestal is an elevationover-azimuth heavy-duty and highdynamic tracking pedestal.
It is characterized by dual drive design -two brushless servomotor and will carry
The tracking controller software, developed by
.gust and 180 Km/h Survival
TAS, uses satellites ephemeris data, extractedfrom Galileo/GPS receivers to control the ACU.Data are processed and converted into theACU format
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Down Converter
The down converter device guarantees system flexibility and modularity in term of bandand intermediate output frequency selection.
92 MHz 42 MHz 42 MHz
10 MHz external10 MHz externalreference providedreference provided
by an Activeby an Active
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Data Recorder and Data Storage
The SMLF BitGrabber is a digitizer, combined with data recorder and storage system steered by a- ,
with National Instruments COTS:
The system is composed of an high-speed digitizer, features two 100-
100 MHz bandwidth. It is based on the PXI Express technology and theoperative frequency (IF) is related to the down converter setting
direction per link) and a x1 PCI Express link to a PCI Express-to-PCItranslation bridge on the backplane.
The system accepts a system timing controller for advanced timing and synchronization (10 MHz of
external reference NavLab active H Maser) .
Since a sampling phase, the signal data flow passes, in real time, to external storage through the data
recorder, that provides recording and playback capability up to 600MB/s
Quad eSATA 4X connectors allows connection to external storage drive chassis or up to 8 individual
SATA disk drives with the a memory size 3TB
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SMLF SISA SW
The SMLF facility implements the capability to collect,collect, processprocess andand archivearchivehigh quality data and measurements from the tracked satellites.
Data types are three:
Samples of the satellites signal, gathered with several devices: I & Q samples from the Bit-Grabber, after the down converter (IF); I & Q sam les from the IF sam ler receivers
I & Q samples from the dedicated instruments, like vector signal analyzer SW with suchoption
Raw Data: the observables seudo-ran es carrier hase C/N0 etc from theGalileo/GPS receivers, connected both to the L band Steerable antenna dish and to theuser antenna;
Measurements of basic arameters like ower level fre uenc stabilit occu iedbandwidth, Spectra shaping and PSD, taken from the instruments, such as spectrumanalyzer and vector analyzer, including also a frequency meter and a power meter.
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SMLF SISA SW
-3
-2
-1
0
1
2
3
4x 10
4 Tracking of B channel
I
Q
0 10 20 30 40 50 60-4
Time [ea ch point corresponds to 2ms]
-1
0
1
2
3
4x 10
4 Tracking of C channel I
Q
0 10 20 30 40 50 60-4
-3
-2
Time [each point corresponds to 2ms]
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Laboratory Equipment
Galileo/GPS RECEIVERSSeptentrio PolaRx2 supports reception of L1 and L2 signals
Javad LEXON GGD 50 channels of single frequency
GPS and GLONASS with raw data and position solution
Septentrio GeNeRx1 is a 54-channel dual-constellation multi-
attractive, sturdy, and watertight box.
,
Galileo L1, E5a, E5b, E5 (AltBOC) and E6 signals, and providesdetailed measurements and data for all tracked signals. GeNeRx1 canoperate in dual constellation GPS/Galileo mode as well as in Galileoonly mode.
The Septentrio PolaNt: a dual-frequency antenna for
precise positioning and surveying applications. Theantenna incorporates low-noise amplifiers.
The Novatel GPS-704X antenna offers access tomultiple Global Navigation Satellite Systems (GNSS)
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nc u ng , a eo an requenc es.
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Laboratory Equipment
The Symmetricon MHM 2010
1s 2.0E-1310s 5.0E-14100s 1.3E-141000s 3.2E-15Floor* 3.0E-15
Long term:
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Conclusions
The design of NavCom Lab SMLF is based on the acquired know-how in the frame of GIOVE-A/B experimentation campaign, GalileoIOV test campaign and Galileo System Evaluation Equipments
e s a e o guaran ees a con nuous s gna mon or ng oone GNSS satellite per time
characterization activities in the RNSS scenario
The final target is to create an asset to be made available for thecurrent and future Galileo activities concerning the performanceverification of the system and the evaluation of possible scenarios
about its evolution.
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Thank YouThank You
or our ttent onor our ttent on
SALVATORE CORVOSALVATORE CORVO
. . .
Via Saccomuro 24, I-00131 Roma (Italy)
Ph. Nr.: +39 06 4151.2282FAX Nr.: +39 06 4191.287
E-mail: [email protected]
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