Difference between revisions of "GEM1305"

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== GEM1305-4540A0 ==
[[File:buynow.png|100px|left|frameless|link=https://www.datagnss.com/products/gem1305]]
<br>
__NOTOC__
GEM1305 is a high performance dual-band RTK module with build-in antenna, which is based on CYNOSURE series chipset. <br>It supports BDS-3
signals, along with global civil navigation systems, including GPS, BDS, GLONASS, Galileo, QZSS,
and SBAS.
[[File:GEM1305-uav-00.png|500px|frameless|GEM1305 dual-band RTK smart antenna]]
If you are working in the field of UAV, you can refer to this link: https://ardupilot.org/copter/docs/common-datagnss-gem1305-rtk.html
=== Feature ===
* Supports GPS, BDS, GLONASS, Galileo, QZSS, and SBAS
* Integrated Real Time Kinematics (RTK)
* State-of-the-art low power consumption design
* Supports multi-band multi-system high precision raw data output, easy for 3rd party integration
* The best cost-effective high precision GNSS positioning solution integrated with antenna
* Compact size 55*55*15mm with high performance
[[File:GEM1305-4540-A0-MAIN-02-720x548.png|400px|frameless|GEM1305 dual-band RTK smart antenna]]
=== Specifications ===
==== Antenna ====
{| class="wikitable"
|-
! align="left" | Item !! Specs
|-
| Frequency Range(MHz) || GPS/QZSS L1,L5, BDS B1,B2, <br>GLONASS L1, GALILEO E1/E5a
|-
| Polarization|| Right-hand circular
|-
| Gain(dBi)|| 90° L1≥5.5 L2≥5 L5≥2.5
|-
| Phase center error(mm)|| ≤±2.0
|-
| Axial Ratio (dB) || 90°≤3.0
|-
| LNA Gain(dB)|| 38±2
|-
| V.S.W.R|| ≤2.0
|-
| Noise Figure (dB)|| ≤1.8
|-
| DC Voltage (V)|| 5.0～5.5
|-
| Current (mA)|| ≤80mA
|-
| Impedance(Ω)|| 50
|-
| Relative Humidity|| 95%
|-
| Operating Temperature(℃)|| -40～+85
|-
| Storage Temperature (℃)|| -55～+85
|-
| Dimensions(mm) || 55 x 55 x 13
|-
| Weight (g)|| 50g
|}
==== GNSS ====
{| class="wikitable"
|-
! style="background-color:#9b9b9b;" | Parameter
! colspan="3" style="background-color:#9b9b9b;" | Specifications
|-
| Constellations
| colspan="3" | BDS, GPS, QZSS, GLONASS, Galileo, NavIC, SBAS
|-
| Channel
| colspan="3" | 128 hardware channels
|-
| Update rates
| colspan="3" | 5Hz default, max up to 10Hz
|-
| rowspan="3" | Position accuracy
| colspan="2" | GNSS
| 1.0m CEP
|-
| colspan="2" | SBAS
| ＜1.0m CEP
|-
| colspan="2" | RTK
| 1.0 cm + 1 ppm (H)<br />2.0 cm + 1 ppm (V)
|-
| rowspan="2" | Velocity & Time accuracy
| colspan="2" | GNSS
| 0.05 m/s CEP
|-
| colspan="2" | 1PPS
| 20ns RMS
|-
| rowspan="2" | TTFF
| colspan="2" | Hot start
| 1s
|-
| colspan="2" | Cold start
| 27s
|-
| rowspan="2" | RTK
| colspan="2" | Convergence time
| <10s
|-
| colspan="2" | Reliability
| ＞99.9%
|-
| rowspan="4" | Sensitivity[1]
| colspan="2" | Cold start
| -148 dBm
|-
| colspan="2" | Hot start
| -155 dBm
|-
| colspan="2" | Reacquisition
| -158 dBm
|-
| colspan="2" | Tracking & navigation
| -165 dBm
|-
| rowspan="2" | Protocol
| colspan="3" | NMEA-0183
|-
| colspan="3" | RTCM 2.X, RTCM 3.X
|-
| Baudrate
| colspan="3" | 230400 bps, by default
|-
| rowspan="3" | Operating condition
| colspan="2" | Main supply
| 4.75-5.25V
|-
| colspan="2" | Digital I/O supply
| 1.75V to 3.63V
|-
| colspan="2" | Backup supply
| 1.62V to 3.63V
|-
| rowspan="4" | Power consumption
| rowspan="2" | Tracking
| GNSS
| 30 mA @ 3.3V
|-
| Single system
| 18 mA @ 3.3V
|-
| rowspan="2" | Standby
| Data backup
| 16 uA
|-
| RTC
| 1.4 uA
|-
| rowspan="3" | Serial interface
| colspan="2" | UART
| 2
|-
| colspan="2" | SPI[2]
| -
|-
| colspan="2" | I2C[2]
| -
|-
| rowspan="2" | Operating limit
| colspan="2" | Velocity
| 515 m/s
|-
| colspan="2" | Altitude
| 18,000m
|-
| rowspan="3" | Environmental conditions
| colspan="2" | Operating temp.
| -40°C to +85°C
|-
| colspan="2" | Storage temp.
| -40°C to +90°C
|-
| colspan="2" | Humidity
| 95% RH
|}
[1] tested with a good external LNA
[2] Supported upon request with special firmware
=== Hardware Description ===
[[File:GEM1305-main-a1.png|500px|frameless|GEM1305 dual-band RTK smart antenna]]
CON_0(J6): 1.25mm pitch 6P connector
Pinout:
* GND
* NC
* Rx0 of GNSS module
* Tx0 of GNSS module
* 5V, input,max current:200mA
CON_1(J5): Pin header connector 2.54mm
* GND
* NC
* Tx1 of GNSS module
* Rx1 of GNSS module
* 5V
'''UART0 can be used for firmware upgrade, while UART1 cannot.'''
=== Applications ===
[https://ardupilot.org/copter/docs/common-datagnss-gem1305-rtk.html GEM1305 for Ardupilot]
=== Package list ===
* GEM1305 receiver
* USB-to-Serial test cable (CH340-based,Red:5V Black:GND Green:Tx White:Rx)
* 6P 1.25mm cable
[[File:GEM1305-cable.png|200px|frameless|GEM1305 usb-to-serial cable]]
For Drones application, the standard package include:
[[File:GEM1305-package-for-ardupilot.png|200px|frameless|GEM1305 package for ardupilot]]
=== Design files ===
*[[File:GEM1305-2D-Drawing.pdf | GEM1305 2D drawing]]
=== Related Documents ===
*[[Satrack Quickguide]]
*[[Allystar_GNSS_Protocol]]




Latest revision as of 12:37, 11 November 2024

GEM1305-4540A0

Buynow.png



GEM1305 is a high performance dual-band RTK module with build-in antenna, which is based on CYNOSURE series chipset.
It supports BDS-3 signals, along with global civil navigation systems, including GPS, BDS, GLONASS, Galileo, QZSS, and SBAS.

GEM1305 dual-band RTK smart antenna

If you are working in the field of UAV, you can refer to this link: https://ardupilot.org/copter/docs/common-datagnss-gem1305-rtk.html

Feature

  • Supports GPS, BDS, GLONASS, Galileo, QZSS, and SBAS
  • Integrated Real Time Kinematics (RTK)
  • State-of-the-art low power consumption design
  • Supports multi-band multi-system high precision raw data output, easy for 3rd party integration
  • The best cost-effective high precision GNSS positioning solution integrated with antenna
  • Compact size 55*55*15mm with high performance


GEM1305 dual-band RTK smart antenna

Specifications

Antenna

Item Specs
Frequency Range(MHz) GPS/QZSS L1,L5, BDS B1,B2,
GLONASS L1, GALILEO E1/E5a
Polarization Right-hand circular
Gain(dBi) 90° L1≥5.5 L2≥5 L5≥2.5
Phase center error(mm) ≤±2.0
Axial Ratio (dB) 90°≤3.0
LNA Gain(dB) 38±2
V.S.W.R ≤2.0
Noise Figure (dB) ≤1.8
DC Voltage (V) 5.0～5.5
Current (mA) ≤80mA
Impedance(Ω) 50
Relative Humidity 95%
Operating Temperature(℃) -40～+85
Storage Temperature (℃) -55～+85
Dimensions(mm) 55 x 55 x 13
Weight (g) 50g

GNSS

Parameter Specifications
Constellations BDS, GPS, QZSS, GLONASS, Galileo, NavIC, SBAS
Channel 128 hardware channels
Update rates 5Hz default, max up to 10Hz
Position accuracy GNSS 1.0m CEP
SBAS ＜1.0m CEP
RTK 1.0 cm + 1 ppm (H)
2.0 cm + 1 ppm (V)
Velocity & Time accuracy GNSS 0.05 m/s CEP
1PPS 20ns RMS
TTFF Hot start 1s
Cold start 27s
RTK Convergence time <10s
Reliability ＞99.9%
Sensitivity[1] Cold start -148 dBm
Hot start -155 dBm
Reacquisition -158 dBm
Tracking & navigation -165 dBm
Protocol NMEA-0183
RTCM 2.X, RTCM 3.X
Baudrate 230400 bps, by default
Operating condition Main supply 4.75-5.25V
Digital I/O supply 1.75V to 3.63V
Backup supply 1.62V to 3.63V
Power consumption Tracking GNSS 30 mA @ 3.3V
Single system 18 mA @ 3.3V
Standby Data backup 16 uA
RTC 1.4 uA
Serial interface UART 2
SPI[2] -
I2C[2] -
Operating limit Velocity 515 m/s
Altitude 18,000m
Environmental conditions Operating temp. -40°C to +85°C
Storage temp. -40°C to +90°C
Humidity 95% RH

[1] tested with a good external LNA

[2] Supported upon request with special firmware

Hardware Description

GEM1305 dual-band RTK smart antenna

CON_0(J6): 1.25mm pitch 6P connector Pinout:

  • GND
  • NC
  • Rx0 of GNSS module
  • Tx0 of GNSS module
  • 5V, input,max current:200mA


CON_1(J5): Pin header connector 2.54mm

  • GND
  • NC
  • Tx1 of GNSS module
  • Rx1 of GNSS module
  • 5V

UART0 can be used for firmware upgrade, while UART1 cannot.

Applications

GEM1305 for Ardupilot

Package list

  • GEM1305 receiver
  • USB-to-Serial test cable (CH340-based,Red:5V Black:GND Green:Tx White:Rx)
  • 6P 1.25mm cable

GEM1305 usb-to-serial cable

For Drones application, the standard package include:

GEM1305 package for ardupilot

Design files

Related Documents

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