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GPS antenna module RTK receiver GMSS high-precision full constellation engineering surveying instrument agricultural surveying radio station

Name: GPS antenna module RTK receiver GMSS high-precision full constellation engineering surveying instrument agricultural surveying radio station
Brand: Dalang Communication
Price: 23 USD
Availability: InStock

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This link compiles all integrated receivers with varied built-in radios and chips. Integrated with positioning, communication and data processing functions, they’re easy to use and reliable—no extra assembly needed. Suitable for surveying, precision agriculture, UAV operations, etc., resources are centralized for quick access. Welcome to choose!

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Model:

AK977k(k803 chip)+AK977k(k803 chip)

AK977k(k803 chip)+AK977u(um980 chip)

AK977u(um980 chip)+AK977u(um980 chip)

AK977k(k803 chip)+AK978s(um980 chip)

AK977u(um980 chip)+AK978s(um980 chip)

AK977k(k803 chip)+AK979k(k803 chip)

AK977k(k803 chip)+AK979u(um980 chip)

AK977u(um980 chip)+AK979u(um980 chip)

AK979k(k803 chip)+AK977k(k803 chip)

AK979k(k803 chip)+AK977u(um980 chip)

AK979u(um980 chip)+AK977u(um980 chip)

AK979k(k803 chip)+AK978s(um980 chip)

AK979u(um980 chip)+AK978s(um980 chip)

AK979k(k803 chip)+AK979k(k803 chip)

AK979k(k803 chip)+AK979u(um980 chip)

AK979u(um980 chip)+AK979u(um980 chip)

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Description

丨 Product Introduction

These 16 solutions are professional high-precision positioning communication solutions, based on AK977K/U, AK978S, AK979K/U and other devices, to build communication links between base stations and mobile stations. Suitable for scenarios such as surveying, agricultural crop protection, engineering surveying, etc. that require positioning accuracy and data transmission.

characteristic:
1. Strong compatibility: Multiple device combinations can be used to flexibly match base station and mobile station devices according to actual needs, meeting different application scenarios.

2. Communication stability: Transmit signals from 0-5km through radio antennas, emphasizing that the base station and mobile station radio/frequency are consistent to ensure stable signal transmission.

3. Interface standard: The mobile station output adopts RS232 protocol, and some are also equipped with Bluetooth serial ports for easy data exchange and integration with other devices.

4. Flexible power supply: The device's power supply range is DC: 9-36V, which can adapt to various power environments.

丨 Specification parameters

Picture
Model	AK977K/U	AK978S	AK979K/U
Working frequency	BDS: B1I B2I B3I B1C B2a B2b GPS: L1 C/A L1C L2P (Y) L2C L5 GLONASS: L1 L2 Galileo: E1 E5a E5b E6 QZSS: L1 L2 L5 L6	BDS: B1I、B2I、B3I GPS: L1C/A、L2P (Y)、L2C、L5 GLONASS: L1、L2 Galileo: E1、E5a、E5b QZSS: L1、L2、L5	BDS: B1I B2I B3I B1C B2a B2b GPS: L1 C/A L1C L2P (Y) L2C L5 GLONASS: L1 L2 Galileo: E1 E5a E5b E6 QZSS: L1 L2 L5 L6
Receiving channel	1408 channel	1408 channel	1408 channel
Single point positioning (RMS)	Plane: 1.5m	Plane: 1.5m	Plane: 1.5m
Single point positioning (RMS)	Elevation: 2.5m	Elevation: 2.5m	Elevation: 2.5m
DGPS(RMS)	Plane: 0.4m+1ppm	Plane: 0.4m+1ppm	Plane: 0.4m+1ppm
DGPS(RMS)	Elevation: 0.8m+1ppm	Elevation: 0.8m+1ppm	Elevation: 0.8m+1ppm
RTK(RMS)	Flat: 0.008m+1ppm	Flat: 0.008m+1ppm	Flat: 0.008m+1ppm
RTK(RMS)	Elevation: 0.015m+1ppm	Elevation: 0.015m+1ppm	Elevation: 0.015m+1ppm
Time accuracy (RMS)	10ns	20ns	10ns
Speed accuracy (RMS)	0.03m/s	0.03m/s	0.03m/s
Cold boot	＜10s	<30s	＜10s
Initialization time	<5s (typical value)	<5s (typical value)	<5s (typical value)
Initialize reliability	＞ 99.9%	＞ 99.9%	＞ 99.9%
frequency range	410-470MHz	410-470MHz	410-470MHz
Channel spacing	12.5KHz	12.5KHz	12.5KHz
Working mode	half-duplex	half-duplex	half-duplex
Frequency stability	1.5ppm	1.5ppm	1.5ppm
modulation mode	CSS	CSS	CSS
Airborne baud rate	12Kbps	12Kbps	12Kbps
Protocol type	LoRa	LoRa	LoRa
Serial port baud rate	4800/9600/19200/38400/115200bps	4800/9600/19200/38400/115200bps	4800/9600/19200/38400/115200bps
Maximum data transmission and reception size persecond	1000Byte	1000Byte	1000Byte
Receive current	50mA	50mA	50mA
Emission current	＜2A	＜2A	＜2A
Transmission power	33dBm±1.5dB	33dBm±1.5dB	33dBm±1.5dB
Differential data	RTCM3.X	RTCM3.X	RTCM3.X
output format	NMEA-0183, RTCM3.X	NMEA-0183, RTCM3.X	NMEA-0183, RTCM3.X
Data update rate	1Hz-20Hz(default 1Hz)	1Hz-20Hz(default 1Hz)	1Hz-20Hz(default 1Hz)
Radio interface	SMA ports	SMA ports	TNC ports
GNSS antenna interface	SMA ports	SMA ports*2	/
Data/power interface	8-core LEMO ports	8-core LEMO ports	8-core LEMO ports
bluetooth interface	/	/	5.0 full transparency
Voltage	DC +9V～36V	DC +9V～36V	DC +9V～36V
Power waste	＜3W	＜3W	＜3W
Indicator light	1power，1PPS，1RTK	1power，1PPS，1RTK	1 power light, 1 satellite light, 1 differential light
Size	100mm61.8mm18.75mm	100mm61.8mm18.75mm	138mm23mm90mm
Weight	180g	180g	1kg
Shell material	aluminium	aluminium	ABS+PC+UV
Working temperature	-30℃ ～ +70℃	-30℃ ～ +70℃	-40℃ ~ +70℃
Storage temperature	-55℃ ～+85℃	-55℃ ～+85℃	-55℃ ~ +85℃
Humidity	95%condensation	95%condensation	100% fully sealed, anti condensation
Protection grade	IP66	IP66	IP67
Seismic resistance	Resist the impact of a 1-meter free fall	Resist the impact of a 1-meter free fall	Resist the impact of a 1-meter free fall

丨 product mix

AK977K/U/AK978S:

Table 1 M8 Interface Definition

M8-8P Male Interface Description
No.	Interface Name	Function Description
1	VCC	Input voltage 9-36V (typical value 12V), current 3A
2	RADIO-D-	Radio serial port USB D-
3	RADIO-D+	Radio serial port USB D+
4	RS232-RXD	GNSS module RS232 RXD
5	RS232-TXD	GNSS module RS232 TXD
6	CAN-	NC
7	CAN+	NC
8	GND	Mainboard GND
LED Indicator Interaction
1	PWR	The power indicator light is always red during normal operation, flashing red and green alternately during transmission, and flashing red and blue alternately during reception
2	RTK	Differential positioning indicator, solid blue in FIX state
3	PPS	Positioning indicator, green light flashes, provides an output pulse per second (1PPS) signal with adjustable pulse width and polarity
Antenna Interface Definition
1	GNSS 1 Antenna	SMA female, primarily receives GNSS antenna signals, antenna power supply 5V
2	GNSS 2 Antenna	SMA female, primarily receives GNSS antenna signals, antenna power supply 5V
3	Radio Antenna	SMA male, primarily receives/transmits 410-470MHz antenna signals

Structural diagram of connecting cables：

Complete scheme display：

Table 2 Complete Component Description

Model		AK977K/U	AK978S
No.	Product Name	Function Description	Function Description
1	Connection Cable	8-pin aviation connector to Type-C; DC-DC power；DB9 female connector	8-pin aviation connector to Type-C; DC-DC power；DB9 female connector
2	Receiver	Built-in GNSS module and Radio module	Built-in GNSS module and Radio module
3	Radio Antenna	433±20MHz antenna	433±20MHz antenna
4	5-meter Coaxial Cable	TNC to SMA, 50-3 cable	TNC to SMA, 50-3 cable
5	5-meter Coaxial Cable	/	TNC to SMA, 50-3 cable
6	GNSS1Antenna	All-system, all-frequency antenna	All-system, all-frequency antenna
7	GNSS2Antenna	/	All-system, all-frequency antenna

AK979K/U:

Table 1 Interface Definition

M12-8P MALE Introduce
NO.	Name	Function Description
1	VCC	Input voltage 9~36V (typically 12V), current 3A
2	RADIO-D-	Radio port USB D-
3	RADIO-D+	Radio port USB D+
4	RS232-RXD	GNSS module RS232 RXD
5	RS232-TXD	GNSS module RS232 TXD
6	CAN-	Not connected
7	CAN+	Not connected
8	GND	Circuit board ground

Table 2 Indicator Light Display Definition

NO.	Name	Indicator Light Description
1	BT	Blue light (HC02)
2	RX	Data transmission
3	TX	Data reception
4	VCC	Power light. Red during normal operation
5	PPS	Green light flashes during positioning
6	SAT	RTK light. Light flashes when connected to RTK data

Complete display：

Table 3 Cable Connection Definition

NO.	Name	Function Description
1	Radio Antenna	Male SMA, receives and transmits 410-470MHz radio signals
2	Connecting	Cable 8-core aviation connector to Type C; DC-DC power supply; Female DB9
3	Receiver	Built-in GNSS module, radio module, Bluetooth module (HC02)
4	base	M90SD strong magnetic suction cup

丨 schematic diagram

Advanced Positioning Solution for Surveying Professionals
This high-precision GNSS RTK receiver is engineered to meet the demanding needs of engineering and agricultural surveying professionals. It integrates a GPS antenna module with real-time kinematic technology to deliver centimeter-level accuracy essential for fieldwork. Users seeking a dependable, easy-to-operate device for applications ranging from construction site surveys to precision farming will appreciate its capacity to function independently of cellular networks. The product’s versatility supports flexible configurations as base or mobile stations, making it a key tool for surveyors and professionals who require consistent, accurate location data in remote or infrastructure-limited environments.

Comprehensive Technical Features and Specifications
Equipped with full satellite constellation support — including BDS, GPS, GLONASS, Galileo, and QZSS — this GNSS RTK receiver optimizes positioning accuracy with over 1400 receiving channels. It provides a horizontal accuracy of approximately 0.008m plus 1ppm and vertical accuracy of 0.015m plus 1ppm in RTK mode. The built-in radio communication operates over a 410-470 MHz frequency, enabling stable data transmission up to 5 kilometers without reliance on external networks. With standard communication interfaces such as RS232 and optional Bluetooth, the device easily integrates into existing data workflows. Its robust housing meets IP66 and IP67 ratings, ensuring reliable performance in challenging field conditions.

Practical Applications and Industry Relevance
The GNSS RTK receiver excels in diverse industry settings, including construction, precision agriculture, and autonomous vehicle positioning. Its ability to establish and maintain accurate base and rover station links facilitates precise topographical mapping, crop monitoring, and UAV navigation without network interference. For applications requiring dependable geospatial data in remote locations, the device’s radio transmission provides uninterrupted communication between field units. It supports efficient workflow integration by interfacing with Bluetooth or serial devices, empowering users to collect and process critical location data rapidly and accurately for improved decision-making.

Use Scenarios

High-Precision Engineering Surveying on Construction Sites
In construction engineering, this GNSS RTK receiver plays a vital role in establishing highly accurate reference points for foundational layouts, structural alignment, and site planning. Operating in outdoor environments that often lack reliable cellular networks, the device’s radio communication technology ensures continuous RTK corrections with centimeter-level precision. It facilitates the creation of consistent geospatial data streams between base stations and mobile units distributed across large sites. Integration with standard RS232 and Bluetooth-enabled field instruments supports seamless data collection workflows, enhancing project efficiency and accuracy during various surveying phases.

Agricultural Field Surveying and Crop Management
Within agricultural landscapes, precision positioning is essential for crop mapping, yield estimation, and autonomous machinery navigation. The GNSS RTK receiver offers robust support for full satellite constellations, ensuring continuous signal availability even in remote or obstructed fields. Its ability to function independently of network infrastructure allows uninterrupted positioning corrections over several kilometers, critical for large-scale farm operations. By linking base stations with mobile units and facilitating data transfer through multiple interfaces, the receiver integrates effectively into precision agriculture systems, optimizing planting schedules and improving overall farm resource management.

FAQ

What materials and technologies are used in this GPS antenna module RTK receiver?
This GPS antenna module RTK receiver combines a GNSS antenna with an integrated RTK radio using LoRa modulation technology. It supports all major satellite constellations for precise positioning, with rugged IP66/IP67-rated materials designed to withstand harsh outdoor conditions, ensuring reliable operation in field environments.

Is customization available for the GMSS GNSS RTK receiver to fit specific surveying needs?
Shenzhen Dalang Communication Technology offers versatile compatibility for the GNSS RTK receiver, supporting multiple device configurations such as base and mobile stations. While product models vary, custom communication interfaces or power options can be discussed directly for tailored solutions.

How should the GPS antenna module RTK receiver be installed and powered in the field?
The device supports a broad DC power range from 9 to 36 volts, adaptable to various power sources on-site. Installation is flexible due to its compact size and lightweight design (approx. 180g to 1kg). It uses standard RS232 or optional Bluetooth interfaces for easy integration with supported devices.

What logistics and support services are provided when buying a GNSS receiver from Shenzhen Dalang?
When you buy a GNSS receiver from Shenzhen Dalang, products are shipped worldwide under rigorous quality checks. The company provides post-sale technical support and consultation to ensure correct setup and maintenance throughout the product lifecycle. Contact our team for detailed shipping and service information.

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