The ICARUS consortium has created a new video demonstrating the Vertical Alert Service (VALS) and Common Altitude Reference Service (CARS) that have been implemented as a result of the ICARUS project.

The Vertical ALert Service is part of the UTM Services listed in ISO UAS traffic management (UTM) — Part 12: Requirements for UTM service providers

VALS – Alert manned and unmanned aircraft on present vertical distance above the common geodetic reference system from ground, when such distance becomes too small.

ISO/DIS 23629-12:2021

International Organization for Standardization

What is the Vertical ALert Service?

The VALS performs live analyses of known obstacles and Surface Model (DSM) to inform about the “clearance” from obstacles within one minute of the flight (length of the BAR express velocity of an aircraft).

In other words, VALS informs about a potential collision within a minute of flying at a given speed and direction.

VALS is supported by the highly responsive DSM (Digital Surface Model) and real-time altitude conversion (CARS) which means that the source of altitude can be either a barometric sensor (typical for manned aviation) or GNSS.

The VALS features three levels of alert:

  • GREEN – No risk of collision
  • YELLOW – The clearance from terrain is less than 5m
  • RED –  Collision imminent, within 1 minute from the alert*

The color and the length of the bar changes in real-time according to the speed and the direction of the UAS

* The VALS reaction time can be set individually