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Main ❯ Navigation & tracking systems ❯ RedNode: Device specification
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RedNode - Universal navigation receiver Device specification |
KEY FEATURES
- 3D position in absolute geographical coordinates
- Emulation of the protocol of conventional GNSS receivers
- Update rate of 3D position up to 1 Hz
- Completely acoustically passive device
- Minimum dimensions and weight
- Simultaneous operation of an unlimited number of devices*
- Reliable and noise-resistant digital broadband underwater acoustic communication technology
- Patented** monoblock design
DESCRIPTION
RedNWave is the only system to date, created using patented** technology, that implements the so-called “underwater GPS”: following exactly the ideology of GPS and other satellite systems, it allows an unlimited number of underwater objects to determine their geographical position at the same time.
With the support of four floating navigation sonobuoys RedBase, simultaneous operation of an unlimited number of RedNode and RedNav devices is possible in one operating area.
RedNode is the universal navigation receiver of the RedWave system. It receives underwater acoustic navigation signals from the buoys and determines its own geographical coordinates, which it transmits via a serial interface (UART) to the control system. It emulates the sentence format used in conventional GNSS receivers, which ensures maximum simplicity of integration.
* Patents US10989815B2, WO2017044012A1, EP3349040A4, RU2599902C1.
** Patent RU2659299C1.
TECHNICAL SPECIFICATIONS
| PARAMETER | VALUE |
|---|---|
| DIMENSIONS (REMOTE UNIT, Ø x h) | 64 x 62 mm |
| WEIGHT (dry) | 0.3 kg |
| SUPPLY VOLTAGE1 | 12 V |
| DATA LINE VOLTAGE | 3.3 V |
| DATA LINE OUTPUT IMPEDANCE | 1 kΩ |
| POWER CONSUMPTION | 0.35 W |
| MAXIMUM VELOCITY RELATIVE TO BUOYS | +/- 1.8 m/s |
| OPERATING TEMPERATURE RANGE | -5 .. 50 °C |
| MAXIMUM IMMERSION DEPTH | 300 m |
| MAXIMUM WORKING AREA SIZE | 700 x 700 m inside the buoy figure |
| MAXIMUM ACOUSTIC COMMUNICATION RANGE2 | 3000 m |
| CARRIER FREQUENCY | 20100 Hz |
| MINIMUM SIGNAL-TO-NOISE RATIO (IN BAND)3 | -6 dB |
| REFERENCE ELLIPSOID | WGS-84 |
| NOMINAL HORIZONTAL ACCURACY4 (2DRMS) | 0.84 m |
| NOMINAL DEPTH ACCURACY5 | 0.1 m |
| NOMINAL TIME TO FIRST FIX | 28 s |
| NOMINAL POSITION UPDATE RATE | 1 Hz |
| NOMINAL STARTUP TIME | 100 ms |
| BUILT-IN TEMPERATURE SENSOR ACCURACY | 0.1 °C |
| CABLE LENGTH | 1 m |
| CABLE DIAMETER | 5 mm |
| INTERFACE6 | UART, 9600 |
| COMMUNICATION PROTOCOL | NMEA0183 (RMC, GGA, WTW) + extended set of sentences |
1 For devices manufactured after June 2020. For devices manufactured earlier, the supply voltage is 5 V.
2 A parameter that determines the maximum range at which signal reception is possible, based on the electro-acoustic parameters of the transmitter and receiver, the spatial decrease in the intensity of sound energy, attenuation in the medium and the acoustic noise level.
3 The value was obtained without taking the multipath propagation effect into account.
4 The value was obtained by measurement in a real body of water with the buoys and the navigation receiver fixed in place for 60 minutes.
5 The value may depend on the correctness of the salinity of the water in which the work is performed, as set by the user.
6 By agreement, the device can be supplied with an RS422 interface converter mounted on the cable in a maintenance-free urethane housing.