Why wireless Auto-METAR

  • Airport and Heliport Weather Monitoring System (WMS) for small and private airports/heliports for real-time VFR decision making.
  • High system reliability is assured by the weather station's redundant power control/management system called PowerProtect with full lightning protection.
  • PowerProtect is designed to isolate sensor power faults and any unforeseen sensor electrical problems for high up-time and reliability.
  • METARlogGSM is the Auto-METAR generating unit. It is a field proven meteorological data logger and future-proof with very good expandability and upgradeability. 

Start small and grow

Basic sensor set for limited METAR report generation includes:

  • Wind speed & wind direction (available with heating for all-weather reliability in winter climates)
  • Temperature, humidity, dew/frost point
  • Barometric pressure - multiple options available
  • Wireless Auto-METAR transmission via GSM/GPRS for placement flexibility and to minimize cables and associated ground work and permits

Reliability & robustness

Proven reliable sensors tested in all climates featuring:

  • Heated wind sensor is optional for cold climates
  • Sensors feature 3-stage lightning protection
  • PowerProtect automatically disconnects electrical faults to maintain weather station up-time in case of electrical faults, short circuits or lightning strikes
  • Backup 12 V Pb (lead-acid) battery charging and monitoring of battery performance parameters for preventative battery replacement detection
  • ESD, EMI, surge, transient & lightning protection on all logger power and data lines

Expandability & growth

 FUTURE PROOF High-accuracy triple redundant pressure sensor upgrade for IFR airports.

Future-Proof Sensor Expandability

  • Ability to add multiple high-accuracy barometric pressure sensors for redundancy and reliability to meet IFR airport requirements
  • Expandability is assured via fully independent digital sensor ports to suit specific airport requirements
  • Option to add a ceilometer for cloud base monitoring
  • Up to 8 total RS-485 MODBUS sensors
  • 2 fully independent sensor power branches/lines


At the heart of our Auto-METAR generating weather station for airports is the METARlogGSM real-time data logger & PowerProtect electrical management & protection system. Weather data from METARlogGSM can be directly fed into your existing servers and software system or on-line METAR widget on your website.

What is AUTO-METAR explained

What does the word "AUTO" in a METAR message indicate?

  • The presence of "AUTO" in a METAR report message indicates a fully automated report with no human intervention.
  • Absence of AUTO indicates that the report is either a manual report or an automated report with an observer logged on to the system.
    (The report modifier group which contains the AUTO or COR modifiers does not appear in all reports.)

What does the word "COR" in a METAR message indicate?

  • Presence of "COR" in a METAR means that a corrected METAR or SPECI is being transmitted. "COR" report invalidates a previous message and replaces it with a "COR" message.

Can "AUTO" and "COR" be in a METAR message simultaneously?

  • "AUTO" and "COR" cannot be transmitted in the same METAR. Logic indicates that if the term "COR" is used, the observation cannot be "AUTO", because someone (observer) is correcting it.
  • Any automatic "AUTO" report generating system has no way of knowing that the previous message needs to be corrected since it was generated by the rules programmed into the system.
  • If an observer is not monitoring METAR observations from a weather station, than by default, the METAR report messages sent from the weather station must contain the modifier word "AUTO".
  • "AUTO" informs the pilot that the system is not being monitored by a human observer and the associated risks.

When is SPECI report generated and what is it?

  • SPECI is issued and transmitted when a significant change in weather conditions occurs (deterioration or improvement). Significant change in winds and gusts, visibility, cloud base height or occurrence of severe weather. It can be issued by an AUTO METAR generating system based on ICAO & WMO guidelines.

Paraphrased from: Aeronautical Information Manual Study Guide For The Private Pilot: 2013