M990 GNSS Receiver
M990 is a SUNNAV independent research and development , the application of tianbao BD990 board card , Trimble's latest Maxwell 7 technology , It supports l-band function . single antenna reception . Support for multi-satellite reception . The highest positioning frequency canreach 50Hz. A strong, lightweight metal case with watertight results is suitablefor a variety of operating environments . Based on its high efficiency and stable positioning accuracy , it is widely used in surveying and mapping, water-conservancy, tran-sportation, municipal admini-stration, agriculture, ocean, aviation and other fields

Features
■ Trimble Maxwell 7 Technology
■ 336 Channels for multi-constellation GNSS support
■ Trimble RTX and OmniSTAR Support
■ Compact design for mobile applications
■ Flexible RS232, USB and Ethernet interfacing
■ Centimeter level position accuracy
■ Advanced RF Spectrum Monitoring

Specifications
SINGNAL TRACKING
336 Channels
-GPS:L1/L2/L5
-BeiDou: B1/B2/B3
-GLONASS: L1/ L2 / L3
-Galileo: E1/ E5/E6
-SBAS: L1/L5
-MSS L-Band: OmniSTAR, Trimble RTX
POSITIONING SPECIFICATIONS
PostProcessing Static：Horizontal:2.5mm+1ppm, Vertical:5.0mm+1ppm
RealTime Kinematics (RTK)：Horizontal:8.0mm+1ppm, Vertical:15mm+1ppm
Initializationtime: <8s
Initializationreliability: > 99.9%
Up to50 Hz raw measurement & position outputs
Timeto First Fix
Cold start < 45s
Hot start < 11s
Signal re-acquisition< 2s
PHYSICAL AND ELECTRICAL CHARACTERISTICS
Size.：200mm x 126mm x 49mm
Weight：960g
Temperature Operating：-40℃~70℃
TemperatureStorage：-45℃~80℃
Humidity：95% condensation
Power：9~16v
Communication interface: 2 RS232 interfaces /2 external powerinterfaces /1
Ethernetinterface
Radio frequency interface: 1 GNSS antennainterface
REFEERENCE OUTPUTS/INPUTS
CMR/CMR+/sCMRx/RTCM 2.1、2.2、2.3、3.0、3.112、3.2
INSTRUCTIONS
3 LED indicator lights (power light/starsearch light/data transmission light)