The NSS Gemini SR28 GPS Receiver range is L1 frequency GPS Receivers which utilizes a heritage GPS chipset. Targeted towards low-cost SmallSat constellations, it allows for space altitude and velocity use cases. The Gemini-SR5 operates from a 5V supply voltage while the Gemini-SR28 operates from an unregulated 28V supply voltage incorporating latch-up protection/detection and a watchdog timer for increased reliability and robustness.

The Gemini Receiver range is based on the existing NGPS-01-422 and NGPS-03-422 GPS Heritage Receivers with improved performance and accuracy. The Gemini range introduces two new protocol options, NMEA083 and a Binary protocol.


  • Accurate determination of orbital position
  • Accurate knowledge of time
  • Orbit maneuvers
  • Time and/or position stamping of payload data

Key features

  • L1 receiver
  • Small size and low mass
  • Radiation tolerant COTS
  • Simple to interface

Flight heritage

The NewSpace Systems (NSS) GPS Receivers are based on the NSS NGPS-01-422 and NGPS-03-422 which have been flying for more than a decade. To date, >60 Receivers and >70 Antennae have been delivered globally to a variety of international missions and constellation programs. The Gemini-SR5 has been extensively qualified and has deliveries scheduled for 2024.

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Last updated: 2024-02-06

GEMINI-SR28 GPS Receiver




< 500 g
155 mm (excluding connector)
76 mm (excluding connector)
34 mm (excluding connector)
position accuracy (1σ)
< 10 m
velocity accuracy (1σ)
< 25 cm/s
update rate
1 Hz
operating frequency
L1 (1575.42 MHz)
power consumption
1.5 W (excluding active antenna)
power supply
24 to 36 V DC unregulated (isolated)
thermal (acceptance)
-10 to 50 C
mechanical vibration
14 gRMS (random)
data interface
connector type
SMA Female (antenna)
D-Sub standard density 9-pin (power)
D-Sub high density 26-pin (communication)
radiation tolerance
10 krad (component level)


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