The use of a commercial ADS-B receiver to derive upper air wind and temperature observations from Mode-S EHS information in The Netherlands

Ministry of Infrastructure and the Environment, Royal Netherlands Meteorological Institute (KNMI), S. de Haan, M. de Haij and J. Sondij
De Bilt : KNMI

Only recently, a new method to derive weather information from aircraft has been developed and tested on quality, availability and applicability for use inoperational meteorological applications. This method exploits the information retrieved from an enhanced surveillance (EHS) terminal area radar at an airport. This radar interrogates all aircraft in the range of the radar in a special or selective mode (Mode-S) on which the aircraft responds with information on e.g. heading, airspeed, Mach number and ground track. These messages aretransmitted through UHF channels using the Broadcast Dependent Surveillance (BDS) protocol. The so-called Automatic Dependent Surveillance Broadcast (ADSB) data is gathered by ATC and can be combined with tracking information to create Mode-S EHS derived wind and temperature observations in the upper air. The derived observations are of good quality (De Haan, 2011, 2013b) and have proven to be valuable for numerical weather forecasting (De Haan and Stoffelen2012, De Haan 2013a). The ADS-B messages can be collected with a wide range of commercial 1090 MHz receivers. This is widely done by aircraft spotters all over the world. The data protocols are described in ICAO and EUROCAE/RTCA documentation and this opens the opportunity to install an ADS-B receiver to downlink the Mode-S EHS data as interrogated by ATC The Netherlands.

48 p.
Fig., tab.
(Technical report = Technisch rapport ; TR-336)
XIII.d.44/336 KNMI uitleenbaar