Sentinel M-Code

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Sentinel M-Code Image

The Sentinel® M-Code GPS Receiver from General Dynamics provides PPS position, velocity, and time information for LEO and GEO satellites (with an option for MEO and HEO). It has 32 channels (can go up to 64 channels) with support for C/A, P(Y), and Modernized M-Code (L2C optional) civil signals. This receiver operates in the L1 and L2 bands, has a dual antenna configuration, and allows any channel to be assigned to either antenna. It features integrated anti-jam technology and anti-spoof algorithms to enable superior performance in GPS-contested and denied environments. The receiver is qualified and tested for the space environment (pyrotechnic shock, random vibration, thermal vacuum, radiation) and EMI/EMC (tailored MIL-STD-461F).

The Sentinel® M-Code GPS Receiver utilizes GEO sidelobe acquisition and tracking algorithms to enable continuous PNT availability and provides near real-time position, velocity, and time measurements for superior user performance. It has a fast acquisition processor for a rapid cold start time of less than 15 minutes (GEO) and 10 minutes (LEO). This receiver utilizes precision time stamping to allow unprecedented accuracies in space. It is available in an enclosure that measures 180 x 160 x 60 mm and includes an RS-422 interface. The receiver requires a DC supply and consumes less than 9 W of power.

Product Specifications

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Product Details

  • Part Number
    Sentinel M-Code
  • Manufacturer
    General Dynamics Mission Systems
  • Description
    Space-Qualified L1/L2 Band GPS Receiver for LEO and GEO Applications

General Parameters

  • Type
  • Technology
  • Band
    L1, L2
  • Integrated Antenna
  • Channels
    32, 64
  • Industry Application
    Military, Space


  • Dimension
    180 x 160 x 60
  • Weight
    2.5 kg


  • Operating Temperature
    -34°C to +71°C

Technical Documents