ComNav K827N GNSS Module

Name: ComNav K827N GNSS Module
Brand: ComNav

The ComNav K827N GNSS Module is a compact GNSS board for precise positioning and heading in UAVs, surveying, agriculture, robotics and machine control. It combines multi-constellation, multi-frequency reception with Dual-Resolving RTK and an onboard IMU, supporting navigation in static, dynamic and challenging reception environments.

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Product overview

The ComNav K827N GNSS Module provides centimeter-accuracy positioning and high-precision heading for static and dynamic applications. Its full-constellation, multi-frequency tracking covers GPS, BDS-2, BDS-3, GLONASS, Galileo, NavIC, QZSS and SBAS, with L-Band and S-Band support. Dual-Resolving RTK processes observations from primary and secondary antennas on two processors, computing RTK independently to improve robustness and positioning availability in complex environments. Applications include UAVs, land surveying, autonomous driving, precision agriculture, machine control and robotics.

Built as a 46mm × 71mm × 10mm board weighing 15.0 g, the K827N incorporates an IMU and a 2 x 14 pin hardware interface. Integrated GNSS and IMU operation maintains centimeter-level positioning for 3s and meter-level positioning for 10s during GNSS signal loss. Connectivity includes CAN support, three LVTTL ports and two SPI interfaces, with position output rates up to 50Hz. Operating temperature spans -40 °C to +85 °C. Power consumption is 1.8 W with anti-interference off; enabling it adds about 0.2W.

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Specifications

ComNav K827N GNSS Module specifications
Specification	Value & conditions
Product and applications	ComNav K827N GNSS Module; GNSS board for land surveying, autonomous driving, precision agriculture, machine control, robotics and UAVs; centimeter-accuracy positioning and high-precision heading in static and dynamic environments.
Dual-Resolving RTK	Two processors independently compute RTK using observations from the primary and secondary antennas.Observations from primary and secondary antennas.
Integrated IMU	Integrated GNSS and IMU; maintains centimeter-level positioning for 3s and meter-level positioning for 10s during GNSS signal loss.During GNSS signal loss.
Board compatibility and CAN	CAN protocol support; standard I/O and pin definitions with physical and data-format compatibility for mainstream GNSS boards using standard 20-pin to 28-pin connections.
Positioning signals	GPS: L1C/A, L1C, L2P, L2C, L5; BDS-2: B1, B2I, B3I; BDS-3: B1I, B3I, B1C, B2a, B2b; GLONASS: G1, G2, G3; Galileo: E1, E5b, E5a, E5 AltBoC, E6c; QZSS: L1C/A, L2C, L5, L1C; SBAS: L1C/A; NavIC: L5, S Band; L-Band.Positioning.
Heading and secondary positioning signals	GPS: L1C/A, L1C, L2P, L2C, L5; BDS-2: B1, B2I, B3I; BDS-3: B1I, B3I, B1C, B2a, B2b; GLONASS: G1, G2, G3; Galileo: E1, E5b, E5a, E5 AltBoC, E6c; QZSS: L1C/A, L2C, L5, L1C. Heading and Positioning 2.
Cold start	Less than 20sWith Acceleration Capture Module added.
Hot start	Less than 10sWith RTC; typical.
Reacquisition	Less than 1s
RTK initialization	Initialization time: less than 5s with baseline less than 10km; initialization reliability: greater than 99.9 %.Baseline less than 10km for RTK initialization time.
Velocity accuracy	≤ 0.02 m/sPDOP ≤4.
Acceleration and overload	Acceleration: 4 g; overload: 15g.
Time accuracy	20ns
Attitude	Azimuth: 0.15°/R; roll or pitch: 0.25°/R.
Post-processing positioning	Horizontal: 2.5 mm + 1 ppm; vertical: 5 mm + 1 ppm.Post processing.
RTK positioning	Horizontal: 8 mm + 1 ppm; vertical: 15 mm + 1 ppm.Single Baseline RTK.
Other positioning modes	DGPS: less than 0.4 m RMS; SBAS: 1 m 3D RMS; standalone: 1.5m 3D RMS. DGPS, SBAS or standalone positioning, respectively.
Dimensions and weight	46mm×71mm×10mm (L × W × H); 15.0 g.
Hardware interface	2 x 14 pin
Power consumption	1.8 W with anti-interference off; enabling anti-interference consumes about 0.2W more.1.8 W with anti-interference off; about 0.2W additional consumption with anti-interference on.
Temperature ranges	Operating: -40 °C to + 85 °C; storage: -55 °C to + 95 °C.Operating and storage temperatures, respectively.
LNA power	+3.3V ~ +5V ± 5%VDC @ 0-100mALNA power.
LNA gain	20 ~ 35dBExternal LNA.
Impedance matching	50 Ohm
Communication ports	3 LVTTL ports; 2 SPI.
Event marker and PPS connections	2 event marker inputs; 1 Pulse Per Second (PPS) output.
Status indicator pins	3 working-status indicator pins.
Correction data input/output	RTCM 2.X, 3.X; CMR (GPS only); CMR+ (GPS only).CMR and CMR+ support GPS only.
Position data formats	ASCII: NMEA-0183 GGA, GSA, GSV, RMC, HDT, VHD, ZDA, VTG, GST, GLL; PTNL, PJK; PTNL, AVR; PTNL, GGK. ComNav Binary. BINEX: 0x00, 0x01-01, 0x01-02, 0x01-05, 0x7d-00, 0x7e-00, 0x7f-05.
Position data output rates	1 Hz, 2 Hz, 5 Hz, 10 Hz, 20Hz (optional), 50Hz.20Hz is optional.