Introduction

Small size, light weight, easy integration, small volume, high-precision Heading module TOP982-4238

Features

● Based on the new generation GNSS SoC - NebulasIV, which integrates RF, baseband, and high precision algorithm

42 x 38 mm ultra small volume

UART1+UART2 data ports

● Supports all-constellation multi-frequency on-chip RTK positioning and dual-antenna heading solution

● Supports GPS L1/L2/L5 + BDS B1I/B2I/B3I + GLONASS G1/G2 + Galileo E1/E5a/E5b + QZSS L1/L2/L5 + SBAS

● Dual-RTK engine

● Adaptive recognition of differential data input in RTCM format

Performance

Single Point positioning(RMS)	Horizontal: 1.5m
	Vertical: 2.5m
DGPS (RMS)	Horizontal: 0.4m
	Vertical: 0.8m
RTK (RMS)	Horizontal: 0.8cm+1ppm
	Vertical: 1.5cm+1ppm
Observation Accuracy (RMS)		BDS	GPS	GLONASS	Galileo
B1I/L1 C/A/G1/E1 code		10cm	10cm	10cm	10cm
B1I/L1C/A/G1/E1 carrier phase		1mm	1mm	1mm	1mm
B2I/L5/E5a/E5b code		10cm	10cm	10cm	10cm
B2I/L5/E5a/E5b carrier phase		1mm	1mm	1mm	1mm
B3I/L2P(Y)/L2C/G2 code		10cm	10cm	10cm	10cm
B3I/L2P(Y)/L2C/G2 carrier phase		1mm	1mm	1mm	1mm
Heading accuracy (RMS)		0.1°/1m baseline
Time accuracy (RMS)		20 ns
Velocity accuracy (RMS)		0.03 m/s
Cold start		<30s
Initialization time		<5s (typical)
Initialization reliability		>99.9%
Data update rate		Dual antenna 20 Hz
		20 Hz raw data output
Differential data		RTCM V3.X
Data Format		NMEA-0183, Unicore

Working temperature	-40°C~+85°C
Storage Temperature	-55°C~+95°C