Excessive Mode S interrogations can saturate the 1030/1090 MHz frequency band, degrade surveillance performance, and risk transponder shutdowns. To address this, EUROCONTROL has published technical guidelines to support the optimal configuration of Mode S radars and WAM (Wide Area Multilateration) systems. The document offers practical configuration guidance and promotes harmonised practices across civil and military surveillance systems.
These recommendations help:
- Improve efficiency of the 1030/1090 MHz spectrum
- Ensure reliable transponder operation
To support consistent implementation, the document also defines common references and terminology - helping to avoid misinterpretation among various parties engaged in the acceptance and configuration of interrogators including the system operators, frequency managers and regulatory authorities.