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This positioning application meets strict needs such as car navigation, mapping, surveying, security, agriculture and so on. Only clear view of sky and certain power supply are necessary to the unit. It communicates with other electronic utilities via compatible dual-channel through USB interface and saves critical satellite data by built–in backup memory. With low power consumption, the GR-213U tracks up to 20 satellites at a time, re-acquires satellite signals in 100 ms and updates position data every second. Tracks up to 20 satellites * Receiver: L1, C/A code * Max update rate: 1 HZ. Acquisition time * Reacquisition: 0.1sec.averaged * Hot start: 8 sec., averaged * Warm start: 38 sec., averaged * Cold start: 42 sec., averaged Position accuracy: * Non DGPS (Differential GPS) * Position: 5-25 m CEP without SA * Velocity: 0.1 m/sec, without SA * Time: 1 usec sync GPS Time * EGNOS/WAAS: Position: < 2.2 m, horizontal 95% of time < 5 m, vertical 95% of time Dynamic Conditions: * Altitude: 18,000 meters (60,000 feet ) max * Velocity: 515 meters / second (700 knots) max * Acceleration: 4 G, max * Jerk: 20 meters/second, max Antenna Type:Built in Patch Antenna Minimum signal tracked:-159dBm Dimension: 2.54 × 1.65 × 0.7 Inch Weight : < 84g LED function: * Power On/Off and Navigation * Update Indication Operating temperature: * -40 C to +80 C Storage temperature: * -45 C to +100 C Operating humidity: * 5% to 95% No condensing. Power consumption * < 80mA at 4.5- 5.5V input Protocol and interface: * NMEA output protocol: V.2.2 Standard: * Baud rate: 4800 bps * Data bit: 8 * Parity: N * Stop bit: 1 * Format: GGA,GSA,GSV, RMC. Optional: * Baud rate: 9600,19200,38400 * Format: GLL,VTG, ZDA, SiRF * binary Interface: * USB interface