True Wind Direction and Speed Measurements System on the Ship with 433 MHz Radio Telemetry
Aprilia Erlita Lisnawati (a*), Nanda Winata (a), Satria Raya Putra (a), Tegar Allfi Ariyandy (a), Agus Tri Susanto (a)

a) Indonesia Agency for Meteorology Climatology and Geophysics (BMKG)
Jl. Angkasa I, No.2 Kemayoran, Jakarta Pusat, Indonesia
*aprilia.lisnawati[at]bmkg.go.id

Abstract

The wind is a collection of air masses that traverses the air pressure disparity. The true wind is an actual wind speed and direction that did not affected by the ship^s speed and direction. It is an essential thing for the safety of marine transportation. The research aims to establish the effectiveness of the true wind direction and speed measurements system. The system will make the ship captain easier for monitoring the true wind data without having to analyze the apparent wind data. This system uses two primary sensors, such as GPS and an anemometer. The GPS Ublox Neo M8N generates the ship^s speed and the coordinate data in latitude and longitude, while the anemometer delivers the signal as the apparent wind data. All data will be automatically measured using an algorithm to obtain the true wind data. This measurement will be processed by the Arduino mega 2560 as a microcontroller that additionally also needs an RTC to generate the time data. The output data, such as time, coordinates, and true wind speed and direction, are recorded on the SD card and displayed on LCD. In addition, the true wind data is also sent from transmitter to receiver through a 433 MHz 3DR telemetry communication and displayed on the user interface as real-time data. The conclusion is that system is truly efficient and effective for knowing the real-time true wind data, and the communication distance can achieve roughly 87.02 meters.

Keywords: True wind- Apparent wind- Speed- Direction- Anemometer

Topic: Ocean Remote Sensing and Marine Technology