New lightweight and low(ish) cost differential GPS units are being investigated to measure ice flow. They must find a solution fairly quickly after being powered-up (base and rover), which is expected to be roughly +-2cm accuracy. These are the units under test:

  • Ublox M9P
    • L1/L2 multi-constellation chip
    • low power and cm accuracy
    • used in our current developments
  • Swift Navigation Piksi Multi
  • Ublox M8P – tested when it was released
    • but only uses L1