• Multi-constellation GNSS+INS integration 
  • RTK
  • High positioning update rate


Single-antenna high-precision OEM GNSS receiver module AP101 provides positioning data as well as raw satellite measurements to be used in RTK and DGPS applications in code and phase measurements modes. It tracks GPS L1/L2/L5, GLONASS L1/L2, Galileo E1/E5a/E5b, BeiDou B1/B2, NavIC(IRNSS) L5, SBAS L1 signals. On-board loosely-coupled GNSS/INS integration algorithm helps to fuse data from GNSS measurement unit with MEMS-based IMU sensor. The raw measurement data are available for user’s secondary processing, as well as API functions for own developments, thus, using our modules, users are free to create an effective solution for each specific application.


Option 1 GPS L1(C/A)/L2(C), GLONASS L1(C/A)/L2(C/A),Galileo E1/E5b, BeiDou B1/B2, SBAS L1
Option 2 GPS L1(C/A)/L5, GLONASS L1(C/A), Galileo E1/E5a, BeiDou B1/B2, NavIC(IRNSS) L5, SBAS L1
Measurement precision (RMS)
C/A pseudoranges1 20 cm
L1, L2 carrier phase 0.8 mm
Accuracy (RMS)   Horizontal Vertical
Position – Standalone mode 1.5 m 2 m
– DGPS mode2 0.25 m 0.5 m
– RTK mode2          5 mm + 0.5 ppm 8 mm + 1.0 ppm
Velocity 0.1 m/s 0.15 m/s
Orientation angles accuracy (RMS)
Yaw, pitch, roll
  Position data update rate
Standalone mode 1 Hz
RTK mode 1, 5, 10 Hz
INS aided mode Up to 100 Hz
Raw data update rate Up to 100 Hz
Interfaces 2 x UART, 1 x USB
Interface protocols RTCM 3, NovAtel OEM, NMEA-0183, NTL Binary
Ambient conditions
Operating temperature –40 °C … +80 °C
Storage temperature –55 °C … +85 °C
Electrical parameters
Supply voltage 3.3 or 5 V ±5%
Power consumption <0.9 W
Weight and size
Dimensions (L х W х H) 71 х 46 х 10 mm
Weight (without package) <28 g
1 Smoothed pseudoranges
2 Optional. Special firmware is required. It can be provided by Absolute Precision OÜ or developed and added to on-board MCU by the user