AWOS FAA Advisory Circular (AC) & Transport Canada (CAR 804) compliant

M-AWOS-432 Aviation Weather Observation System

A fully integrated, aviation-grade automated weather observation system — delivering FAA and ICAO compliant measurements of pressure, wind, temperature, humidity, visibility and present weather for airports and aerodromes of all sizes.

Overview

M-AWOS-432 Aviation Weather Observation System

The M-AWOS-432 is OSI's aviation-grade automated weather observation system, purpose-built to meet the stringent requirements of FAA and ICAO aeronautical weather standards. It integrates six sensor parameters — pressure, wind, temperature, humidity, visibility and present weather — into a single, certified platform delivering continuous METAR-ready observations around the clock.
Key Benefits
  • ICAO & Transport Canada compliant — meets all aeronautical weather observation standards
  • Full parameter suite in one integrated system — no multi-vendor complexity
  • Continuous 24/7 automated operation with no operator intervention
  • Aviation-grade visibility measurement from 20 ft to 10 miles
  • Precision present weather discrimination — rain, snow, fog and precipitation type
  • Proven in demanding field deployments at airports and remote aerodromes
  • Supports automated METAR, SPECI and ATIS generation
Measured Parameters

Complete Aviation Weather Coverage

The M-AWOS-432 delivers every parameter required for ICAO and FAA aeronautical weather observation reporting in a single certified platform.

Barometric Pressure
17.6 – 35.6 inHg

High-accuracy pressure sensing covering the full operational altitude range for altimeter setting and QNH/QFE reporting.

Wind Speed & Direction
0 – 60 m/s  |  0 – 360°

Precision ultrasonic wind measurement with no moving parts — reliable in icing conditions and gusts up to 60 m/s.

Air Temperature
−40 to +85 °C

Wide-range temperature measurement covering arctic deployments through to hot desert airfield environments.

Relative Humidity
0 – 100% RH

Full-range humidity measurement for dew point calculation and fog likelihood assessment in aviation briefings.

Visibility (MOR)
20 ft – 10 miles

Aviation-grade forward-scatter optical visibility measurement from Category III minima to clear-sky visual range.

Present Weather
WMO Codes

Automated discrimination of rain, snow, fog and precipitation type — delivering standardized WMO present weather codes for METAR reporting.

6
Integrated Parameters
10 mi
Max Visibility Range
24/7
Unattended Automated Operation
FAA
& ICAO Certified
Specifications

Primary Specifications

ParameterRange / Value
Barometric Pressure17.6 – 35.6 inHg
Wind Speed0 – 60 m/s
Wind Direction0 – 360°
Air Temperature−40 to +85 °C
Relative Humidity0 – 100% RH
Visibility (MOR)20 ft – 10 miles
Present WeatherRain, snow, fog, precipitation type
ComplianceFAA and ICAO aeronautical standards
OperationAutomated, continuous, unattended
OutputMETAR, SPECI, ATIS compatible
Present Weather Detection

What the M-AWOS-432 Reports

The system automatically classifies current weather conditions and outputs standardized WMO present weather codes — ready for direct insertion into METAR and SPECI reports.

Rain Drizzle Snow Fog Mist / Haze Freezing Rain Mixed Precipitation
IES Deployment — India Heliports

IES deployed OSI-based AWOS sensor suites across 10 heliport sites in India, providing precise ICAO-compliant weather observations for safe aviation operations across diverse terrain and climate conditions — completing a nationwide precision heliport weather monitoring deployment in September 2023.

Standards & Compliance

Built to Aviation Standards

The M-AWOS-432 meets the principal international standards governing aeronautical weather observation systems.

FAA Advisory Transport Canada CAR ICAO WMO Present Weather Codes METAR / SPECI Reporting
Applications

Where the M-AWOS-432 Is Deployed

Commercial & Regional Airports

Provides certified automated weather observations to support ATC operations, runway selection, approach procedures and pilot briefings at commercial and regional airports worldwide.

Remote Aerodromes & Heliports

Ideal for unmanned remote aerodromes and heliports where continuous certified weather observation is required without on-site personnel — proven across IES deployments in India and internationally.

Military Airfields

Ruggedized aviation-grade performance for military airfield applications requiring reliable operations across extreme temperature ranges and demanding environmental conditions.

IES Integration

Connected to IES WebGIS

M-AWOS-432 observations integrate directly into the IES WAFS-WebGIS and Met-WebGIS platforms — enabling airport weather data to be displayed alongside NWP model outputs, radar, satellite imagery and OPMET data in a single operational environment.

This makes the M-AWOS-432 the natural ground sensor choice for airports already using IES aviation weather software solutions, creating a seamless pipeline from in-situ observation through to flight briefing.

  • METAR output feeds directly into IES WAFS-WebGIS OPMET display
  • Sensor observations mapped geospatially in Met-WebGIS
  • Visibility and present weather alerts configurable in IES platform
  • Historical observation archive for climate analysis and reporting
Pair with WAFS-WebGIS

The IES WAFS-WebGIS aviation briefing system is UK-Met SADIS certified and displays METAR, TAF, SIGMET and WAFS products alongside local M-AWOS-432 observations in one browser-accessible platform.

Pair with Met-WebGIS

For National Meteorological Services, M-AWOS-432 data feeds into the IES Met-WebGIS forecasting platform, contributing surface observations to the national synoptic network and NWP model data assimilation.

Equip Your Airport with Certified Weather Observation

Contact IES to discuss the M-AWOS-432 for your airport or aerodrome, request a technical specification sheet, or learn how it integrates with our aviation weather software solutions.

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