Home > GNSS RTK receiver > AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio

All Constellation GNSS GPS RTK Receiver Built-in 1W Radio Base Mobile Station Heading UAV Precision Agriculture

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Model:
AK978H
Working frequency band:
 BDS/GPS/GLONASS/GALILEO/QZSS
Function:Rover/Base/CRS
RTK accuracy:cm-level
Output protocol:NMEA0183、RTCM3.X
Data update rate:1Hz - 20Hz (default1Hz)
Data communication (radio frequency):410 - 470MHZ
Data communication (radio protocol):ransparent/Mac/TT450S
Voltage:DC +9V~36V
Power consumption:<3W
Connector:SMA-J*3 / 8-core LEMO ports
Size(mm):100*61.8*18.75
Weight:180g

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  • Model specifications:
    AK978H+AK700 complete set
    AK978H+AK628 complete set
    AK978H+AK181 complete set
    AK978H+AK161 complete set
    AK700+base+TNC-SMA 5m adapter cable
    AK700+base+TNC-TNC 5m adapter cable
    Single AK978H
    Single AK700
    Single AK628
    Single AK181
    Single AK161
    Single TNC-SMA 5m adapter cable
    Single TNC-TNC 5m adapter cable
    M8-8P aviation head cable
    Single base
Quantity:
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
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  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • AK978H RTK receiver GMSS high-precision dual antenna directional agricultural automatic instrument radio GPS antenna module radio
  • Description



丨 Product Introduction


1.Support full constellation multi frequency chip level RTK positioning and dual antenna heading solutions.

2.Supports BDS, GPS, GLONASS, Galileo, QZSS, and SBAS.

3.Can be used as a base station or mobile station, as well as for heading.

4.Adaptive recognition of differential input RTCM format.

5.Adopt on-board standard 9-36V wide voltage input.

6.Adopt industrial grade 1W wireless radio module.




丨 Specification parameters


Specification parameters

GNSS module

1

Working mode

BDS: B1I、B2I、B3I

GPS: L1C/A、L2P (Y)、L2C、L5

GLONASS: L1、L2

Galileo: E1、E5a、E5b

QZSS: L1、L2、L5

2

Receiving channel

1408 channel 

3

Single point positioning (RMS)

Plane: 1.5m

Elevation: 2.5m

4

DGPS(RMS)

Plane: 0.4m+1ppm

Elevation: 0.8m+1ppm

5

RTK(RMS)

Flat: 0.008m+1ppm

Elevation: 0.015m+1ppm

6

Directional accuracy (RMS)

0.2 degrees/1m baseline

7

Time accuracy (RMS)

20ns

8

Speed accuracy (RMS)

0.03m/s

9

Observation accuracy (RMS)

BDS

GPS

GLONASS

Galileo

10

B1I/B1C/L1 C/A/E1/G1 pseudorange

10cm

10cm

10cm

10cm

11

B1I/B1C/L1 C/A/E1/G1 carrier phase

1mm

1mm

1mm

1mm

12

B3I/L2P (Y)/L2C/G2 pseudorange

10cm

10cm

10cm

10cm

13

B3I/L2P (Y)/L2C/G2 carrier phase

1mm

1mm

1mm

1mm

14

B2I/L5/E5a/E5b pseudorange

10cm

10cm

10cm

10cm

15

B2I/L5/E5a/E5b carrier phase

1mm

1mm

1mm

1mm

16

cold boot

<30s

17

Initialization time

<5s (typical value)

Radio module

1

frequency range

410-470MHz

2

Channel spacing

25KHz

3

Working mode

half-duplex

4

Frequency stability

<±1.5ppm

5

modulation mode

GMSK \ 4FSK

6

Airborne baud rate

9600bps 19200bps

7

Protocol type

TRIMATLK/South/TRANSEOT/TRIMMARK3

8

Serial port baud rate

4800/9600/19200/38400/115200bps

9

Power (typical value)

High power transmission: 4.0W@3.3V DC

Low power (0.5W): 27.0 ± 1.2dBm@DC  3.3V

Machine standby: 0.3W@3.3V  DC

10

Transmitting RF output power

(410-470MHz)

High power (1.0W): 30.2 ± 1.0dBm@DC  3.3V

Low power (0.5W): 27.0 ± 1.2dBm@DC  3.3V

11

Stability of RF power transmission

≤±1dB

12

Receiver Sensitivity

> -115dBm@BER  10-3,  9600bps

13

Receive common channel suppression

>-12dB

Interface

1

Wireless interface

SMA ports

2

GNSS interface

SMA ports

3

Data/power interface

8-core LEMO ports

Data format

1

Differential data

RTCM3.X

2

output format

NMEA-0183, RTCM3.X

3

Data update rate

1Hz-20Hz(default 1Hz)

power supply

1

Voltage

DC +9V~36V

2

power waste

<3W

3

indicator light

1power,1PPS,1RTK

Physical

parameters

1

size

100mm*61.8mm*18.75mm

2

weight

180g

3

Shell material

aluminium

Environmental

Specifications

1

working temperature

-30℃ ~ +70℃

2

Storage temperature

-55℃ ~+85℃

3

humidity

95%condensation

4

Protection grade

IP66

5

Seismic resistance

Resist the impact of a 1-meter free fall






丨 product mix


           

                                                          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

No.

Product Name

Function Description

1

Connection Cable

8-pin aviation connector to Type-C; DC-DC power;DB9 female connector

2

Receiver

Built-in GNSS module and Radio module

3

Radio Antenna

433±20MHz antenna

4

5-meter Coaxial 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

7

GNSS2Antenna

All-system, all-frequency antenna

 

antenna parameters:

        

Electrical

Characteristics

1

Frequency Range

GPS: L1, L2, L5

BDS: B1I, B2I, B3I, B2a, B2b

GLONASS: L1, L2, L3

Galileo: E1, E5b, E5a, E6

QZSS: L1, L2, L5, L6

IRNSS: L5

L-BAND

2

Output Standing Wave

≤2.0

3

Antenna Axial Ratio

≤3dB

4

Maximum Gain

5.5dBi

5

Phase Center

±2mm

6

Impedance

50Ω

7

Polarization Mode

RHCP

LNA

Specifications

1

LNA

L1:38±2dB

L2:38±2dB

2

VSWR

≤2.0

3

Noise Figure

≤1.8dB

4

In-band Flatness

1dB

5

Operating Voltage

3.3~12V

6

Operating Current

≤45 mA

7

Differential Transmission Delay

≤5ns

Structural Characteristics

1

Antenna Size

Φ159*61mm

2

Weight

≤380g

3

Connector Type

TNC

4

Thread Specification

Unified National Coarse (UNC) 5/8''×11 (Imperial)

5

Mounting Method

centering rod mounting

Environmental Conditions

1

Operating Temperature

-40℃~+85℃

2

Storage Temperature

-55℃~+85℃

3

Humidity

95% non-condensing

 

                

Antenna

Characteristics

1

Operating Frequency

GPS: L1C/A, L1C, L2P, L2C, L5

BDS-2: B1I, B21, B31

BDS-3: B1I, B31, B1C, B2a, B2b

GLONASS: G1, G2, G3

Galileo: E1, E5b, E5a, E5AltBoC, E6c

QZSS: L1C/A, L2C, L5, L1C

SBAS: L1C/A

IRNSS: L5

2

Antenna Specifications

GPS, Bei Dou,GLONASS,GALILEO

3

Frequency Range

1165-1278/1559-1612MHz

4

V.S.W. R

≤2.0

5

Axial Ratio

Elevation angle 90 degrees: ≤3

Elevation angle 15 degrees: ≤5

6

Gain

Elevation angle 90 degrees: ≥6

Elevation angle 20 degrees: ≥0 (plane)

7

Front to back power

±60 degrees: ≥15dB

8

Phase Center (mm)

<2

9

Impendence

50Ω

10

Polarization

RHCP

LNA

1

LNA GAIN

38±2dB

2

V.S.W. R

<2

3

Noise Figure

<1.5

4

DC Voltage

3.3~18V

5

Current

<35 mA

Mechanical

Structure

1

Component Name

SPEC

2

Antenna Connector

TNC / SMA

3

Antenna Dimensions

Φ120*38mm

4

weight

313.8g

5

PCB board

FR4

Environmental Characteristics

1

Operating Temperature

-40℃~+85℃, 10%~95% RH

2

Storage Temperature

-55℃~+100℃, 10%~95% RH

3

Vibration

Sine sweep @1.5mmAM

10~55Hz each Axis

 

picture

1

picture

 

 

Electrical

Characteristics

1

Operating Frequency

GPS: L1, L2, L5

BDS: B1I, B2I, B3I, B2a, B2b

GLONASS: L1, L2, L3

Galileo: E1, E5b, E5a, E6

QZSS: L1, L2, L5, L6

IRNSS: L5

GPS: L1, L2, L5

BDS: B1I, B2I, B3I, B2a, B2b

GLONASS: L1, L2, L3

Galileo: E1, E5b, E5a, E6

QZSS: L1, L2, L5, L6

IRNSS: L5

2

Frequency Range

1170-1278/1559-1612MHz

1170-1278/1559-1612MHz

3

V.S.W. R

≤2.0

≤2.0

4

Axial Ratio

Elevation at 90 degrees: ≤ 3,

Elevation at 15 degrees: ≤ 5

At elevation angle 90 degrees:

≤3, at elevation angle 15 degrees: ≤5

5

Gain

Elevation at 90 degrees: ≥ 6 dB,

Elevation at 20 degrees: ≥ 0 dB

At an elevation angle of 90 degrees:

≥6, at an elevation angle of 20 degrees: ≥0 plane

6

Phase Center

<2mm

<2

7

Impendence

50Ω

50Ω

8

Polarization

RHCP

RHCP

9

Out-of-Band Suppression

1268+100MHZ≥50db,

1170-100MHZ≥50db,

1602+100MHZ≥50db,

1561-100MHZ ≥50db.

1268+100MHZ≥50db,

1170-100MHZ≥50db,

1602+100MHZ≥50db,

1561-100MHZ ≥50db.

LNA

1

LNA GAIN

38±2dB

38±2dB

2

V.S.W. R

<2

<2

3

Noise Figure

<2.0

<2.0

4

DC Voltage

3.3~16V

3.3~16V

5

Current

<35 mA

<35 mA

Mechanical

Structure

1

Part Name

SPEC

SPEC

2

Antenna

FPC

FPC

3

Antenna Dimensions

Φ45.6*40mm

Φ62.1*25mm

4

Product Weight

25.8g

25.4g

5

Coaxial line

RG316 / RG1.13(customizable)

RG316 / RG1.13(customizable)

6

Line length

L=150mm / L=250mm(customizable)

L=150mm / L=250mm(customizable)

7

RF Output Interface

SMA-J / IPEX / MCX / MMCX(customizable)

SMA-J / IPEX / MCX / MMCX(customizable)

8

Antenna Housing

ABS+PC

ABS+PC

9

PCB Board

FR4

FR4

Environmental

Characteristics

1

Operating Temperature

-40℃~+85℃, 10%~95% RH

-40℃~+85℃, 10%~95% RH

2

Storage Temperature

-40℃~+85℃, 10%~95% RH

-40℃~+85℃, 10%~95% RH

3

Humidity

Sine sweep

@1.5mmAM 10~55Hz each Axis

Sine sweep

@1.5mmAM 10~55Hz each Axis

4

Vibration Resistance

95% No-condensing

95% No-condensing


AK181:

AK161:






Packaging and Delivery:








High-Precision GNSS Receiver for UAVs and Precision Agriculture

The DALANG AK978H is a high-performance GNSS receiver featuring chip-level RTK and dual-antenna heading technology, delivering native centimeter-level positioning accuracy. With multi-band, multi-system signal reception capability and full compatibility with mainstream industrial data transmission protocols, it excels in high-precision applications such as UAV navigation, precision agriculture, autonomous driving, and surveying.


Real-Time RTK & Heading Engine

The integrated advanced anti-interference unit ensures reliable and accurate positioning data even in complex electromagnetic environments. It provides real-time centimeter-level positioning and precise heading information to meet the high-precision requirements of autonomous equipment.


Designed for Industrial Applications

Widely compatible with mainstream industrial standards for seamless integration into various systems. Equipped with an industrial-grade 1W data radio and supporting 9-36V wide voltage input, it is the ideal positioning and heading solution for UAVs, agricultural machinery, and system integrators.


Reliable in Harsh Environments

Featuring a rugged aluminum alloy shell, IP66 rating, and powerful anti-interference capabilities, it ensures stable performance in challenging environments such as urban areas, mountains, and farmlands.



Product Advantages

  • Full-Constellation RTK & Dual-Antenna Heading
    Supports all major satellite systems for centimeter-level positioning and high-precision heading


  • Industrial Standard Compatibility
    Fully compatible with industrial standard protocols, built-in data radio, wide voltage input, suitable for field and mobile applications


  • Exceptional Stability
    Advanced anti-jamming technology and IP66 rating ensure continuous reliable operation in complex environments


  • High Performance & Easy Integration
    Compact size, fast initialization, easy integration into various systems



Ready to upgrade your UAV or agricultural system with high-precision positioning? Choose DALANG AK978H for a new era of accuracy.




About Us

DALANG is a dedicated manufacturer of high-performance GNSS modules and RTK positioning solutions, serving industries such as UAV navigation, precision agriculture, and geospatial mapping. With a clear focus on accuracy, reliability, and integration flexibility, we support both standard and custom applications across global markets. Our product lines are engineered to meet the evolving demands of real-time positioning with support for multiple GNSS constellations, including GPS, GLONASS, BDS, and Galileo.

Our production facility spans 2,500㎡ and includes advanced SMT lines, in-house R&D labs, and full functional testing for every unit shipped. With a team of 30+ GNSS engineers, we design and manufacture over 200,000 GNSS receivers and modules annually. Certified to ISO9001:2015, and compliant with CE and RoHS standards, we follow a strict quality assurance process from prototyping through mass production. We also provide firmware updates, system integration support, and full lifecycle product documentation.

Trusted by partners in over 30 countries, DALANG delivers fast, scalable manufacturing with personalized technical support. Our streamlined collaboration model—covering inquiry, consultation, prototyping, and delivery—ensures efficiency from first contact to deployment. Whether you're sourcing off-the-shelf GNSS hardware or launching a customized solution, DALANG is your dependable partner for accurate, cost-effective positioning systems.


FAQ

1. Who are we?
We are DALANG, a specialized manufacturer of GNSS modules and RTK positioning systems based in China, with a focus on high-precision solutions for UAVs, surveying, and smart agriculture.

2. How can we guarantee quality?
All products undergo strict multi-stage quality control, including SMT production, functional testing, and 100% final inspection. We are ISO9001:2015 certified and follow international compliance standards such as CE and RoHS.

3. What can you buy from us?
You can purchase GNSS receivers, RTK modules, base stations, antennas, flight control positioning systems, and other GNSS-related components and accessories.

4. Why should you buy from us not from other suppliers?
We combine strong in-house R&D, flexible OEM/ODM support, industrial-grade quality assurance, and fast global delivery. Our expertise in GNSS RTK ensures stable, accurate, and scalable solutions tailored to your specific use case.

5. What services can we provide?
We offer OEM/ODM customization, technical consulting, firmware support, prototyping, and global after-sales service. Our team works closely with international clients to ensure efficient communication and long-term support.

 

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