Main Features of Youwei GPS GNSS Positioning Modules

1, Weak-Signal Performance

Reliably acquires and maintains satellite locks even in challenging environments (e.g., urban canyons, indoor-outdoor transitions).

2, Multi-Channel Satellite Tracking

Multi-channel receiver processes signals from GPS, GLONASS, Galileo, and BeiDou simultaneously, enhancing fix speed and accuracy.

3, Rapid Initialization

Hot start: <1s (with ephemeris retention)

Warm start: <28s (using almanac data)

Cold start: <30s (full satellite scan)

4, Energy Efficiency

Optimized power architecture reduces operating current to ≤25mA without sacrificing performance.

5, Environmental Resilience

Stable operation across -40°C to +85°C and high-electromagnetic-noise areas.

6, Anti-Interference Design

Minimizes multipath errors for consistent positioning near reflective surfaces.

7, Global Compatibility

Supports all mainstream GNSS constellations (configurable via firmware).

8, Data & Integration

Standard NMEA 0183 output + customizable binary protocols.

Compact 35mm × 25mm SMD package for space-constrained designs.

9, Quality Assurance

FCC/CE/RoHS certified

Parameters of YW-35254G1 GPS GNSS Locating Module

The Significance of TTFF (Time To First Fix) for GPS Modules

TTFF is a critical performance metric for GPS modules, directly impacting user experience and system efficiency. Here’s why it matters:

1. Enhanced User Experience

Faster Response: Shorter TTFF means quicker location acquisition (e.g., <1s hot start vs. 30s cold start).

Critical for Emergency Use: Rapid TTFF (<10s) is vital for rescue trackers, security devices, and real-time navigation.

2. Technical Performance Indicator

Signal Processing Efficiency: Low TTFF reflects:

High Sensitivity (e.g., -162dBm tracking for weak signals).

Optimized Algorithms (fast satellite ephemeris decoding).

Multi-Constellation Support (GPS + Galileo/BeiDou reduces TTFF).

Power Efficiency: Hot-start-capable modules minimize power drain during frequent restarts.

3. Application-Specific Requirements

4. Industry Benchmarks

Consumer Modules: ≤30s (cold start).

Industrial Modules: ≤20s (e.g., drones, surveying).

Military-Grade: ≤10s (anti-jamming + multi-band support).

5. Design Implications

Battery Life: Frequent cold starts (high TTFF) increase power consumption.

Cost Trade-offs: Low TTFF may require higher-end chips or external flash memory (e.g., for ephemeris caching).