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Fast TTFF GNSS GPS Module with AGPS Support for Quick Positioning in Cold Start

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Fast TTFF GNSS GPS Module with AGPS Support for Quick Positioning in Cold Start

Brand Name : Youwei

Model Number : YW-35254G3

Certification : CE FCC RoHS

Place of Origin : Guangdong, China

MOQ : 100

Price : USD 3.5-4.5 UNIT

Payment Terms : T/T, Western Union, MoneyGram, D/A, L/C, Paypal

Supply Ability : 200000pcs

Delivery Time : 5-7 business days

Packaging Details : Tray/Carton

Product name : Fast GPS Module

Tracking Accuracy : <10 meters

Tracking Sensitivity : typical -162 dBm

Module Dimension : 35x25x4

Supported Systems : GPS, SBAS, QZSS, GLONASS, BeiDou, Galileo

Interface Options : UART, I2C, SPI, USB

Update Rate : 1Hz ~ 10Hz

Voltage Range : 3V ~ 5V

Board Color : Green, Black, Else

Manufacturer : Youwei

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Parameters of YW-35254G3 GNSS GPS Locating Module

Item Parameters
Item No. YW-35254G3
Brand Youwei
Chip As per order
Frequency

GPS L1 C/A

SBAS L1 C/A

QZSS L1 C/A

GLONASS L1OF

BeiDou B1

Galileo E1B/C²

Customized

Number of Channels 32 to 99, As per order
Positioning Accuracy 2 meters to 5 meters
Velocity 515 m/s
Velocity Accuracy

Without aid : 0.1m/s

DGPS: 0.05m/s

TTFF (Time-To-First-Fix)

Hot start: 1 second typical

Warm start: 28 seconds typical

Cold start: 30 seconds typical

Sensitivity

Tracking Sensitivity: -162 dBm

Acquisition Sensitivity: -160 dBm typical

Cold Start:-147dBm

Baud Rate 9600 bps (default)
Navigation Update Rate 1Hz (default), maximum 10Hz
Timing Accuracy 25 ns RMS
Interface Type UART, I2C, SPI, USB
Data Output Format NMEA 0183
Power Supply 3.3V ~ 5V
Operating Supply Current Typical 25mA
Environment Temperature Range -40°C to 85°C
Antenna Type patch ceramic antenna
AGPS Supported
Product Size 35x25x4mm
Package Type SMD
Origin of Country China
White label Acceptable
Packing way Tray/Reel/Tube

What is AGPS (Assisted GPS) in GPS Modules?

AGPS (Assisted GPS) is a technology that enhances GPS positioning performance by combining satellite signals with external assistance data (e.g., cellular networks, Wi-Fi) to improve speed, accuracy, and reliability. Below is a detailed explanation of AGPS, including its working principles and advantages:


1. Definition

AGPS improves traditional GPS by using external assistance data, making it particularly effective in weak-signal environments such as urban canyons or indoors.


2. How AGPS Works

Assistance Data Retrieval:

The AGPS GPS device obtains satellite ephemeris, clock corrections, and other aiding data from cellular networks or the internet.

Faster Positioning:

Assistance data helps the GPS device quickly acquire satellite signals, significantly reducing Time-To-First-Fix (TTFF).

Hybrid Positioning:

Combines GPS, cellular, and Wi-Fi signals to enhance accuracy and reliability.


3. Key Advantages of AGPS GPS Module

Faster Fix – Dramatically reduces TTFF (from minutes to seconds).
Higher Accuracy – Maintains better positioning in weak-signal areas.
Lower Power Consumption – Reduces satellite search time, saving battery.
Wider Applicability – Works well in urban, indoor, and complex environments.


4. Typical Applications of AGPS GPS Modules

Smartphones – Enables quick location fixes for navigation and location-based services.

Vehicle Navigation – Provides stable positioning in urban canyons.

IoT Devices – Ideal for devices requiring fast positioning.

Emergency Services – Quickly locates emergency calls (e.g., E911).


5. AGPS vs. Traditional GPS

Feature AGPS Traditional GPS
Data Source Satellite + Cellular/Wi-Fi aids Satellite signals only
TTFF Seconds Minutes (cold start)
Weak Signals Performs well Struggles


6. Conclusion

AGPS significantly enhances positioning speed, accuracy, and reliability by integrating satellite signals with assistance data. It is widely used in smartphones, vehicle navigation, IoT devices, and emergency services—especially in challenging environments like cities and indoors.

Fast TTFF GNSS GPS Module with AGPS Support for Quick Positioning in Cold Start

Fast TTFF GNSS GPS Module with AGPS Support for Quick Positioning in Cold Start

Fast TTFF GNSS GPS Module with AGPS Support for Quick Positioning in Cold Start

Fast TTFF GNSS GPS Module with AGPS Support for Quick Positioning in Cold Start

Fast TTFF GNSS GPS Module with AGPS Support for Quick Positioning in Cold Start

Fast TTFF GNSS GPS Module with AGPS Support for Quick Positioning in Cold Start

Fast TTFF GNSS GPS Module with AGPS Support for Quick Positioning in Cold Start

Fast TTFF GNSS GPS Module with AGPS Support for Quick Positioning in Cold Start

Fast TTFF GNSS GPS Module with AGPS Support for Quick Positioning in Cold Start

Fast TTFF GNSS GPS Module with AGPS Support for Quick Positioning in Cold Start

Fast TTFF GNSS GPS Module with AGPS Support for Quick Positioning in Cold Start

Fast TTFF GNSS GPS Module with AGPS Support for Quick Positioning in Cold Start

Fast TTFF GNSS GPS Module with AGPS Support for Quick Positioning in Cold Start

Fast TTFF GNSS GPS Module with AGPS Support for Quick Positioning in Cold Start

Fast TTFF GNSS GPS Module with AGPS Support for Quick Positioning in Cold Start


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