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4GNSS
OS-303
THREE-ANTENNA GNSS RECEIVER
4GNSS OS-303
THREE-ANTENNA GNSS RECEIVER
DESCRIPTION
OS-303 is a three-antenna GNSS receiver designed to determine a high-precision attitude.

OS-303 is perfect for applications as hydrography, unmanned vehicles and other tasks requiring the determination of high-precision object's motion vector.
496 channels
GPS: L1 C/A, L1/L2 P, L5
BeiDou: B1, B2, B3
GLONASS: L1, L2
Galileo: E1, E5a, E5b
Three-antenna
Azimuth: (0.2/R)°
Roll or Pitch: (0.4/R)°
2SIM GSM/UHF*
With the function of automatically switching to the most stable correction stream
WebUI
Easy setup and measurements in the browser of any of your device with Wi-Fi
8-32 GB*
Internal memory up to 32GB
--
High-precision trajectory for 2 minutes after the loss of satellite signals

* - optional
TECHNOLOGIES
Our own developments that make GNSS technology easier and more affordable
WEB-SURVEY
All the features of field software and even more directly in the browser of any of your devices!

The operating system no longer matters if your device has Wi-Fi. Android, IOS, Windows, etc. - use a browser for full control and management of the GNSS receiver via the Web interface.
STEADY STREAM
The Steady Stream technology allows your device to use both UHF and GSM connection at the same time. It will ensure reliable reception of corrections even in case of a change in connection type.

Another feature is the automatic switching between UHF-base stations depending on the distance to them and the reliability of the signal.
RTK&GO
Be confident in your field data by combining RTK and Stop&Go modes.

Your receiver during the RTK mode will produce the same shooting in Stop&Go mode. Thanks to this, you can always post-process measurements in case of any problems with the RTK.
STRONG EVENT
Forget about false events when working with external recording devices (for example, a camera during aerial photography).

The built-in comparator cuts off excess events. So each photo corresponds to only one event, which facilitates the subsequent analysis of data for processing.
OS-303
Select the necessary options and equipment, then add the OS-303 to cart
OS-303
Three-antenna RTK GNSS receiver
$
10 485
$
2W UHF
Memory
Basic equipment:
- GNSS receiver OS-303
- Antenna AT340, 3pcs
- Interface cable, 2pcs
- Power supply, 220V
- Power cable

Optionally:

- UHF - antenna
- Coaxial cable for UHF antennas
1
3 YEAR WARRANTY
All 4 GNSS receivers are warranted for 3 years
2
TECHNICAL SUPPORT
Our experts will answer all questions and help with equipment setup.
3
WORLDWIDE SHIPPING
We will send the receiver to anywhere in the world, contact us in advance
TECHNICAL SPECIFICATIONS
Signal Tracking

• 496 channels
- GPS: L1 C/A, L1/L2 P, L5
- BeiDou: B1, B2, B3
- GLONASS: L1, L2
- Galileo: E1, E5a, E5b
- QZSS
- SBAS: WAAS, EGNOS, MSAS, GAGAN


Performance

• Cold start: <50 s
• Warm start: <45 s
• Hot start: <15 s
• RTK Initialization time: <10 s
• Signal reacquisition: <2 s
• Initialization reliability: >99.9%
• Velocity accuracy: 0.03 m/s
• Acceleration: 4 g
• Overload: 15 g
• Time accuracy: 20 ns


Positioning

RTK
Horizontal: 8 mm + 1 ppm
Vertical: 15 mm + 1 ppm

DGPS

< 0.4 m 3D СКО

Standalone
< 1.5 m 3D RMS

SBAS

< 1 m 3D RMS

PostProcessing

Horizontal: 2.5 mm + 1 ppm
Vertical: 5 mm + 1 ppm
Heading

• Azimuth: (0.2/R)°
• Roll or Pitch: (0.4/R)°
R-range between antennas



Communications!!!!!!!!!


• 2 RS232 Lemo4 (f) baud rates up to 921600 bps
• 1 RS232 IMU to PC port* Lemo4 (f) baud rates up to 4000000 bps
• 1 Pulse Per Second (PPS) output BNC (f)
- GNSS-master TNC (f)
- GNSS-rover TNC (f)
• 1 Event Marker input
• Built-in UHF modem *
- 410-470 MHz
- 2W
- TRIMTALK, TRANSEOT, TRIMMK3
- UHF antenna TNC (f)
• Build-in 2SIM GSM modem
- 2G/3G: 900/2100 MHz
- GSM1 antenna TNC (f)
- GSM2 antenna TNC (f)
• Bluetooth
• Wi-Fi 802.11 (APN, client)
• Ethernet RJ-45
• 1 RS232 Lemo4 (f) doubling of GSM/UHF output
• 1 DB9 IMU communication*
• 12 LED indicators show the working status


Data Format

• Correction data I/O: RTCM 2.X, 3.X, CMR (GPS only), CMR+ (GPS only)
• Position data output:
- NMEA-0183
- ComNav protocols
- Data output rate: 1 Hz, 2 Hz, 5 Hz, 10 Hz, 20 Hz*
    Physical

    • Size (L × W × H):
    165 mm × 163,9 mm × 90,1 mm
    • Weight: 1420 g



    Environmental

    • Working temperature: -40°С to +85°С
    • Storage temperature: -40°С to +85°С
    • Humidity: up to 100% (condensation)
    • Waterproof and dustproof: IP67, protected from temporary immersion to depth of 1 m
    • Shock: designed to survive a 2 m drop onto concrete



    Electrical


    • Input voltage: +9.0 V ~ +28.0 VDC
    • Power consumption: up to 3 W
    • Memory up to 32 GB*


    GKV-10 IMU*

    • 5 °/h - Zero gyro instability from
    Allan dispersion
    • 0.1 °/√h - random angular
    wandering of the gyroscope on
    Allan dispersion
    • ± 900 °/s - range of angular
    velocity measurement (possible
    version with a measurement range
    of ± 2700 °/s)
    • 0.03mg - zero accelerometer
    acceleration from Allan dispersion
    • 0.07(m/s)/√h - random walk of the
    accelerometer velocity on Allan
    dispersion
    • ± 10g - accelerometer
    measurement range (versions are
    possible)

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