The Spectra Precision® EPOCH 50 GNSS receiver, with its 220 channels, makes effective use of the GPS L1/L2/L2C/L5 and GLONASS L1/L2 signals for outstanding satellite coverage and precise positioning.

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The Spectra Precision® EPOCH 50 GNSS receiver, with its 220 channels, makes effective use of the GPS L1/L2/L2C/L5 and GLONASS L1/L2 signals for outstanding satellite coverage and precise positioning. EPOCH 50 uses proven technologies to provide both an extremely stable phase center and tracking of the newer L2C and L5 signals.

EPOCH 50 GNSS systems with Survey Pro field software provide field crews with the tools and capabilities to get the job done. With maximum stability, precision, quality, and easy to use work flows, the EPOCH 50 GNSS systems are packed full of proven technologies that you can rely on day-to-day.

The EPOCH 50 GNSS receiver has an internal transmit and receive radio modem so that every receiver may be used as either a base or a rover. Use the internal radio on a construction site for a quick and easy setup. EPOCH 50 also supports external radio and cellular modems for added flexibility and range. In addition, communicate cable free with Bluetooth® to your choice of world-class Spectra Precision data collectors.

EPOCH 50 provides added productivity and cost savings with support of RTK Network technology for single base and NTRIP operations. Connect to networks with Spectra Precision WWAN-enabled data collectors for added flexibility.

Designed with greater than 99.9% reliability initialisations, the EPOCH 50 GNSS receiver provides fast, high quality results in all supported survey modes. Consistent accurate results, quality construction, and affordable pricing make EPOCH 50 the ideal choice for a productive business.

Spectra Precision Survey Office software provides a complete office solution for post-processing GNSS data and adjusting terrestrial survey data. Export your processed and completed results directly back to the field or design software packages using a variety of file formats.

Features & Benefits

     • 220 Channels for Multi- Constellation GNSS support
     • Integrated Transmit and Receive data link
     • RTK, Static, and PPK
     • Network RTK positioning
     • Spectra Precision Survey Pro field software
     • Support for all GNSS data with
     • Spectra Precision Survey Office software


When connected to the data collector:
     • 220 Channels for multi-constellation GNSS support
     • Integrated transmit/receive UHF radio
     • Compact and lightweight design
     • RTK, Post-processed, Kinematic, and Static
     • Network RTK positioning
     • Integrated wireless Bluetooth® 2.0 technology
Technical Specifications
Static GNSS Surveying
High-Accuracy Static
3 mm + 0.1 ppm RMS
3.5 mm + 0.4 ppm RMS
Static & Fast Static
3 mm + 0.5 ppm RMS
5 mm + 0.5 ppm RMS
Real-Time Kinematic GNSS Surveying
Initialisation Time
10 mm + 1 ppm RMS
20 mm + 1 ppm RMS
Automatic OTF (on-the-fly) while moving
Typically 99.9%
<60 seconds from power on to positioning
<30 seconds with recent ephemeris
Code Differential GPS Positioning
0.25 m + 1 ppm RMS
0.50 m + 1 ppm RMS
Differential Positioning Accuracy
Typically <5 m 3DRMS
I/O Two 7-pin Lemo, RS-232
Data Link (UHF radio)
Physical Specifications
Dimensions (W×HxD) 19.0 x 10.7 x 20.0 cm (7.48 x 4.21 x 7.87 in)
Weight (with battery) 1.34 kg (2.95 lb)
     • Advanced, sixth generation, custom survey GNSS technology
     • High-precision multiple correlator for GNSS pseudorange measurements
     • Unfiltered, unsmoothed pseudorange measurement data for low noise, low multipath error, low time domain correlation and high dynamic response
     • Very low noise GNSS carrier phase measurements with
     • Proven Spectra Precision low-elevation tracking technology
     • Satellite signals tracked simultaneously:
          – GPS: L1/L2/L2C/L5
         – GLONASS L1/L2
         – BeiDou: B1/B2
         – Galileo: E1/E5A/E5B
Operating Temperature –40 °C to +60 °C (–40 °F to +140 °F)
–40 °C to +55 °C (–40 °F to +131 °F) with internal radio transmitting
Storage Temperature –40 °C to +75 °C (–40 °F to +167 °F)
Dust/Water IP66
Vibration MIL-STD-810F
Shock/Drop MIL-STD-810F Method 516.5
     • Power 10 V DC to 20 V DC external power input with over-voltage protection on Port 1 and Port 2 (7-pin)
     • Rechargeable, 7.4 V 2400 mAh Li-Ion internal battery
     • Average operating times on internal battery:
         – RTK/Static: 4.0 hours
Communications and Data Storage
     • Internal post process data storage 64 MB (9 MB reserved)
     • Supports external GSM/GPRS/CDMA modems for point to point RTK and NTRIP operations
     • Internal UHF Transceiver. 1 W or 0.5 W transmit power.
     • Supports external UHF transmit data link for RTK base station operation.
     • 1 Hz, 2 Hz, 5 Hz, 10 Hz, and 20 Hz positioning when configured.
Correction Formats
     • sCMRx, CMR, CMR+, RTCM 2.1, RTCM 2.2, RTCM 2.3, RTCM 3.0, RTCM 3.1
          – 25 KHz and 12.5 KHz channel spacing
     • NMEA-0183 output support on COM2 during Network RTK or autonomous operations 


Download the EPOCH 50 Brochure here

Epoch 50 static and GGA output
Epoch 50 static T02 to RINEX