Vaisala AviMet Pressure Altimeter System - APA501

Vaisala AviMet Pressure Altimeter System System Description

Document code
DOC232783EN
Revision
D
Language
English
Product
APA501
Document type
Technical description

The Vaisala AviMet Pressure Altimeter System collects, processes, and displays pressure, temperature, and humidity data measured by dedicated sensors. The design of the system closely follows International Civil Aviation Organization (ICAO) and World Meteorological Organization (WMO) standards.

The system includes Vaisala AviMet Weather Panel Display WID513, Vaisala BAROCAP Digital Barometer PTB330, and Vaisala HUMICAP Humidity and Temperature Probe HMP155.

Figure 1. Operating principle of Vaisala AviMet Pressure Altimeter System

You can use the data to provide the following information:

  • Pressure data for airports, as defined in ICAO requirements
  • Temperature and humidity data for airports, as defined in ICAO requirements
  • Synoptical pressure data, as defined in WMO standards

The system displays the following meteorological parameters on a WID513 display:

  • Aeronautical pressure parameters (QNH, QFE, and TRL)
  • Air temperature, air humidity, and dew point temperature
  • Synoptical pressure parameters (air pressure, QFF, WMO tendency, and trend)

Both measured and derived parameters are displayed in different formats to support the relevant operations around the airport.