High Precision Direction Finding Board

 ER-237 High precision direction finding BoardER-237 is a small size and high precision DF positioning board. The board adopts double Antenna port, can achieve high precision direction finding and positioning. It can be locked in the satellite, continue to provide a reliable course data; not only that, the board also supports the board Measurement of heading, pitch and roll, smaller size, higher cost, new ER-237 receiver will be more easy system integration.Specifications:GNSS PerformanceBDS:B1&B2&B3GPS:L1&L2GLONASS:G1&G2GPS sensitivity:-142dBmChannel number:372Horizontal   positioning accuracy(RMS):Single point1.2mDGPS 0.3mRTK 10mm+1ppmHeading precision:<0.17˚ rms @   0.5m Baseline length<0.09˚ rms @   1.0m Baseline length<0.04˚ rms @   2.0m Baseline length<0.02˚ rms @   5.0m Baseline lengthPitch / roll:<1˚ rmsFluctuation   precision:750px DGPS,125px   RTKSpeed:100˚/s Maximum   valueCold start time:<40sWarm start-up   time:<20sHot start time:<5sHeading lock:<10s（Position   available)Heavy capture:<1sThe standard data   update rate5HzMaximum data   update rate20Hz1PPS accuracy20nsEvent flag input1Event flag inputCommunicationInterface:3 Full duplex main   serial port; CMOS level; 1 USB device; one USB HostBaud rate:4800 ~ 115200Difference data:ROX, RTCMv2.3,   RTCM3.0, RTCMv3.2, CMR,CMR+Data input /   output protocolNMEA0183; Own   binaryPower SupplyPower supply   voltage:3.3VDC± 5%Power waste:<3.8W   rated(GPS/GLONASS/BDS double frequency)Antenna voltage   input:15V DC Maximum   valueAntenna short   circuit protection:yesAntenna input impedance:50ΩEnvironmental ScienceOperating   temperature-40 ~ 85℃ (-40 ~ 185°F)Storage   temperature:-40 ~ 85℃ (-40~   185°F)Humidity:95%Shock and   vibration:non-condensingE M C:EP455PhysicsSize:7.8 L × 7.8 W ×   0.5 H mmWeight:45gPin:34pin 1.27mm   spacingAntenna interface:MCX Female seat,   StraightTop:When the satellite   is locked out of the lock, the heading    precision of 3 degree is provided within 1 minutesTilt sensor:To speed up the   course calculation initialization time, while providing the angle of pitch   and roll ER-321 High precision direction finding BoardIn this world full of complex and dynamic environments, with the development of advanced mechanical control and navigation solutions, ER-321 is one of the most high-end GNSS orientation and positioning module. Adapting to dual antenna port, it brings ER-321 a series of additional functions. Including fast, high accuracy of short baseline orientation and RTK Positioning, L-band China precision satellite based enhancement of receiving signals from, for the ups and downs of the RTK, low power consumption and precise timing. ER-321 features with flexibility, low cost. This GNSS module uses high-end multipath suppression technique, and provides an extended support for BDS L1/L2 to GPS/GLONASSRTK B1/B2/B3 performance.Specifications:GNSS performanceReceiving type：GNSS multi frequency RTK carrier phaseCan receive signal：BDS,GPS,GLONASS,Galileo& QZSSChannel number：372GPS sensitivity：-142dBmSBAS tracking：3 channel, parallel trackingUpdate rate：Standard 20Hz, 5Hz optionalAccuracy：Level (RMS) Gao Cheng (RMS)RTK：10mm + 1ppm 20mm + 1ppmSBAS (WAAS):0.25m 0.50mAutonomous positioning, no SA:1.2m 2.5mDirection finding accuracy:<0.17˚ rms @ 0.5m Antenna spacing<0.09˚ rms @ 1.0m Antenna spacing<0.04˚ rms @ 2.0m Antenna spacing<0.02˚ rms @ 5.0m Antenna spacing<0.01˚ rms @ 10.0m Antenna spacingRoll / roll precision：<1˚ rmsFluctuation precision：30 cm RMS (DGPS), 5 cm RMS (RTK)Timing accuracy (1PPS)：20nsTurning rate：The maximum to 100 or /Scold boot：<40 s (no calendar or clock)Warm start：<20 s(or a typical calendar clock)Hot start：<5 s(a typical calendar, clock and   location)Heading lock：<10 s typical (hot start)Antenna input resistance：50ΩCommunicationSerial port：4 serial CMOS 3.3V (3 main serial ports, 1   only supports differential serial port, 1 Host USB, 1 Device USBBaud rate：4800 - 115200Differential input / output protocol：RTCM SC-104,L-Dif™,RTCM v2.3,RTCM v3 (RTK),CMR,CMR+Data input / output protocol:NMEA0183, Crescent binary, L-DifTiming output：CMOS 1PPS, low level, falling edge   synchronous, 10K, 10pF loadPower SupplyInput voltage :3.3VDC ± 5%power waste：<3.9W (L1/L2 GPS/GLONASS；L-band);<3.2W (L1/L2 GPS/GLONASS)electric current :<1180mA (L1/L2 GPS/GLONASS；L-band);<970mA (L1/L2 GPS/GLONASS)Environmental Scienceworking temperature：-40 ~ 85℃ (-40 ~ 185°F)Storage temperature：-40 ~ 85℃ (-40~ 185°F)Humidity：95% no condensation (integrated into the   system)PhysicsSize：152.4L × 71.1W × 16.3H mmWeight：105gStatus indicator (LED)：Power supply, first and second GPS lock,   differential lock, DGPS position, heading, RTK lock, L-BandPower / data connector：70-pin male head pin, 1.27mm spaceAntenna connector：MCX, female head, straight shape 

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