产品尺寸: 18.5mm L x 20.5mm W x 7.5mm H
主要特性: High-Performance Low-Cost 167 Channel high sensitivity
S1818
High-Performance Low-Cost 167 Channel SMD Global Positioning Receiver Module
The S1818 is state-of-the-art global navigation satellite system receivers capable of using GPS, GPS/Beidou signal under the same footprint. User can upgrade from GPS navigation system to GPS/Beidou dual-satellite navigation systems by choosing appropriate model type without hardware redesign.
Its NMEA output is the same format as GPS receivers, thus users can effortlessly upgrade GPS product to GPS/Beidou product without needing modification on the application software.
Dual-satellite navigation receiver module receives greater number of satellites than available for GPS-only receivers. The increased satellite number offers superior performance in challenging urban canyon and multipath environments.
The S1818 module contains SkyTraq Venus 8 positioning engine inside, featuring high sensitivity for indoor fix, low power consumption, and fast TTFF. The superior -148dBm cold start sensitivity allows it to acquire, track, and get position fix autonomously in difficult weak signal environment. The receiver’s -165dBm tracking sensitivity allows continuous position coverage in nearly all application environments. The high performance signal parameter search engine is capable of testing 16 million time-frequency hypotheses per second, offering industry-leading signal acquisition and TTFF speed.
The S1818 module contains LNA for easy integration with passive antenna and a SAW filter for increased jamming immunity. It works with both passive and active antenna; the self-contained antenna detection and short circuit protection feature enables lowest integration cost for system integrators using active antenna.
Receiver Type
L1 C/A code, 167-channel Venus 8 engine
Accuracy
Position 2.5m CEP
Velocity 0.1m/sec
Time 10ns
Startup Time
1 second hot start under open sky
< 29 second warm start under open sky (average)
29 second cold start under open sky (average)
Reacquisition
1s
Sensitivity
-148dBm cold start
-160dBm re-acquisition
-165dBm tracking
Multi-path Mitigation
Advanced multi-path detection and suppression
A-GPS
7-day sever-based AFPS(ROM and Flash type)
Self-aided ephemeris estimation（Flash type）
Update Rate
1/2/4/5/8/10/20/25/40/50HzforFlashGPS(default1Hz)
1 / 2 / 4 / 5 / 8 / 10 / 20 Hz for GPS/Beidou (default 1Hz)
Dynamics
4G (39.2m/sec2)
Operational Limits
Altitude < 18,000m or velocity < 515m/s
Serial Interface
3.3V LVTTL level
Protocol
NMEA-0183 V3.01 Skytraq binary
9600 baud, 8, N, 1
Datum
Default WGS-84
User definable
Input Voltage
3.3V DC +/-10%
Input Current
40mA Tracking 48mA Acquisition S1818
50mA Tracking 55mA Acquisition S1818-BD
Dimension
18.5mm L x 20.5mm W x 7.5mm H
Operating Temperature
-40Oc ~ +85oC
Storage Temperature
-55 ~ +100oC
Humidity
5% ~ 95%
