Airmar LB150 - Manual (Page 4)

LB150 WeatherStation Technical Manual revision 0.013
Proprietary and Confidential
PRELIMINARY - DRAFT 1
1. Introduction
This document is a supplement to the Airmar LB150 WeatherStation Owner's Guide.
The LB150 WeatherStation is a multifunctional device that integrates several sensors into a single
compact housing. These sensors include:
• Ultrasonic anemometer, providing apparent wind speed and direction
• Thermistor, providing air temperature
• Capacitive humidity sensor, providing % relative humidity
• Piezoresistive pressure sensor, providing barometric pressure
• Magnetoinductive XY sensors, providing magnetic compass heading
• 3-axis MEMS 1 accelerometer, providing pitch and roll angles
• Global Positioning System (GPS) receiver, providing position, and speed and course over ground
In addition to the above directly measured parameters, the LB150 WeatherStation is able to calculate the
following values as well, if the necessary data are available:
• True wind speed and direction
• Heading relative to true north
• Dew point
• Apparent wind chill temperature
• True wind chill temperature
• True wind speed relative to water (with optional Airmar® Smart™ speed sensor, not included)
The LB150 WeatherStation provides one communication interface compliant with the NMEA 0183
protocol
This document provides detailed descriptions of the communications protocol for the NMEA 0183
interface used by the LB150 WeatherStation.
For further information about the NMEA 0183 protocol, refer to the document, NMEA 0183 Standard
for Interfacing Marine Electronic Devices, v3.01. This document is available from the National Marine
Electronics Association ( www.nmea.org ).
1 MEMS is an acronym for Micro Electro-Mechanical Systems