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AsteRx-U3

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Multi-frequency, multi-constellation GNSS positioning and heading receiver, which includes wired and  wireless communications in a rugged IP68 housing,  for the broadest range of applications.


KEY FEATURES

* Full-constellation, triple-frequency satellite tracking on both antennas 

* Sub-degree GNSS heading & pitch or heading & roll 

* Centimetre-level (RTK) 

* Septentrio GNSS+ algorithms for reliable performance

* Integrated UHF radio, cellular modem, Bluetooth   and Wi-Fi (depending on configuration)


BENEFITS

Consistently accurate now and into the future  

The AsteRx-U3 is the most advanced integrated multiconstellation dual-antenna receiver from Septentrio. Its multifrequency engine can track signals from all Global Navigation  Satellite System (GNSS) constellations: GPS, GLONASS,  Galileo, BeiDou, NavIC and QZSS – on both antennas. This  guarantees you reliable and accurate GNSS positioning now  and into the future.

Reliable centimetre accuracy  

Septentrio’s knowledge and 20 years of experience in the  GNSS industry ensures that the AsteRx-U3 offers the highest  possible accuracy, down to the centimetre level. LOCK+  technology maintains tracking during heavy vibrations and  IONO+ ensures position accuracy even during periods of  elevated ionospheric activity. The AsteRx-U3 offers the very  latest in advanced interference mitigation technology AIM+,  which filters out ambient intentional and unintentional RF  interference.  

Any device, any platform 

Use any device with a web browser to operate the AsteRx-U3  without any special configuration software via the Web  interface, accessible over Ethernet, Wi-Fi or USB connections.


FEATURES 

 GNSS technology 

544 Hardware channels for simultaneous  tracking of most visible signals: 

„ GPS: L1 C/A, L1C1 , L2C, L2 P(Y), L5

„ GLONASS: L1 C/A, L2 C/A, L3, L2P 

„ BeiDou: B1I, B1C, B2a, B2I, B3I

„ Galileo: E1, E5a, E5b, E5 AltBOC

„ QZSS: L1 C/A, L1C1 , L2C, L5 

„ NavIC: L5

„ SBAS: EGNOS, WAAS, GAGAN, MSAS, SDCM 

Septentrio’s patented GNSS+ technologies 

„ AIM+ unique mitigation and monitoring  system against narrow and wideband  interference with spectrum analyser

„ IONO+ advanced scintillation mitigation 

„ APME+ a posteriori multipath estimator for  code and phase multipath mitigation 

„ LOCK+ superior tracking robustness under  heavy mechanical shocks or vibrations 

„ RAIM+ Receiver Autonomous Integrity Monitoring 

RTK (base and rover) 

Integrated 4-channels L-band receiver Moving base 

GNSS heading & pitch or heading & roll 

16 GB internal memory


Formats 

Septentrio Binary Format (SBF), fully  

documented with sample parsing tools 

RTCM v2x and 3x (MSM included) 

CMR 2.0 and CMR+ (CMR+ input only) 

NMEA 0183, v3.01, v4.0

UHF: Satel, Trimtalk (450S) Pacific 

Crest (GMSK, 4FSK, FST) 

Connectivity 

3 Hi-speed serial ports (RS232) 

Ethernet port (TCP/IP and UDP) 

CAN port 

High-speed USB 

1 Event marker 

xPPS output (max. 100 Hz)

Bluetooth2  (2.1 + EDR/4.0)

WiFi2  (802.11 b/g/n)

UHF2  (410-475 MHz)

Cellular modem2 : LTE CAT4 

4G LTE CAT4 (B1, B3, B5, B7, B8, B20) 

3G UMTS/HSDPA/HSUPA (850/900/1900/2100) 

2G GSM/GPRS/EDGE (850/900/1800/1900)


PERFORMANCE  

Position accuracy 3,4

                                      Horizontal          Vertical 

Standalone                            1.2 m            1.9 m 

SBAS                                     0.6 m             0.8 m

DGNSS                                 0.4 m              0.7 m 


RTK performance 3,4,5,6 

Horizontal accuracy                  0.6 cm + 0.5 ppm

Vertical accuracy                            1 cm + 1 ppm

Initialisation                                                     7 s 


GNSS attitude accuracy 3,4 

Antenna separation        Heading        Pitch/Roll 

                       1 m                0.15°                0.25° 

                       5 m                0.03°               0.05°  


Velocity accuracy 3,4                              0.03 m/s 


Maximum update rate 

Position                                                    100 Hz 

Position and attitude                                  50 Hz 

Measurements                                          100 Hz 


Latency 7                                                  <20 ms


Time accuracy 

xPPS out8                                                    10 ns

 Event accuracy                                        < 20 ns 


Time to first fix 

Cold start                                                < 45 s 

Warm start10                                            < 20 s 

Re-acquisition                                         avg. 1 s 


Tracking performance (C/N0 threshold) 

Tracking                                                  20 dB-Hz

Acquisition                                             33 dB-Hz


PHYSICAL AND ENVIRONMENTAL 

 Size                                        157 x 245 x 45mm 

Weight                                                       1.5 kg 

Input voltage                                        9-48 VDC 

Power consumption                     8 W maximum 

Operating temperature            -30° C to +65° C 

Storage temperature                 -40° C to +75° C 

Humidity                      IEC60721-3-5, Class 5K2  

Dust                     MIL-STD-810H, Method 510.7, Procedure I 

Shock                   MIL-STD-810H, Method 516.8, Procedure I/II 

Vibration              MIL-STD-810H, Method 514.8, Procedure I 

Corrosion                    IEC60068-2-52, Method 2 


Connectors 

Antennas                                           TNC female 

COM1/3                                   M8 6 pins female 

USB                                          M8 4 pins female

I/O                                             M8 6 pins male   

Ethernet                                 M12 8 pins female 

Power                                       M12 4 pins male

COM2/PPS                             M12 8 pins female 


Antenna LNA power output 

Output voltage               User selectable 3.3V/5V

Maximum current                                    150 mA


Certification 

IP68, RoHS, WEEE, CE, ISO 9001-2015, UKCA

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1  Hardware ready 

2  Optional feature 

3  Open sky conditions 

4  RMS levels 

5  RTK fixed ambiguities

6  Baseline < 40 Km 

7  99.9%

8  Including software compensation of sawtooth effect 

9  No information available (no almanac, no  approximate position)

10 Ephemeris and approximate position known


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