Elevating Airspace Safety Autonomously

DETECT & ALERT (D&A) SYSTEMS

Detect and Alert (D&A) systems empower enterprise drone fleets with advanced ADS-B tracking, and air radar capabilities technologies to safely navigate complex airspace beyond visual line of sight (BVLOS). From Drone as First Responder (DFR) deployments in emergency scenarios to critical infrastructure inspections along pipelines, utilities, and railways, and even last-mile drone deliveries, DAA solutions reduce reliance on human observers and enhance operational efficiency.

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What Are Detect and Alert (D&A) Systems?

Detect and Alert (D&A) (sometimes referred to as Sense and alert) systems are essential technologies that enable drones and unmanned aerial vehicles (UAVs) to operate safely within complex and dynamic airspaces. These systems utilize a combination of sensors, algorithms, and communication protocols to identify potential obstacles and other aircraft, ensuring collision avoidance without the need for human intervention.

By integrating DAA systems, commercial and enterprise drone operators can confidently execute Beyond Visual Line of Sight (BVLOS) missions, significantly expanding the operational capabilities of drones across various industries.

DAA systems are indispensable for applications such as Drone as First Responder (DFR) deployments, private security operations, critical infrastructure inspections—including pipelines, utilities, and railways—and last-mile drone deliveries.

Detect and Alert vs. Detect and Avoid: What's the Difference?

Detect and Alert (D&A) systems identify potential airborne hazards—using technologies like radar, acoustic, or optical sensors—and notify a human operator to take action. In contrast, Detect and Avoid (DAA) systems autonomously detect obstacles and maneuver the aircraft away from them without requiring direct human intervention. While both improve situational awareness, Detect and Alert solutions rely on human decision-making. Detect and Avoid systems generally offer a more proactive, automated approach that supports safer, more efficient beyond visual line of sight (BVLOS) operations.

Types of Detect and Alert Systems

Detect and Alert systems encompass a variety of technologies, each tailored to specific operational needs and environments. Understanding the different types of D&A systems is essential for selecting the right solution for your drone operations. The three primary types of D&A systems are Radar, Acoustic, and Optical.

3. Optical DAA Systems

Optical systems leverage cameras and visual sensors to detect and classify other aircraft through image recognition and computer vision.

uAvionix (Iris Automation) Casia G

Pros Cons

High Detection Rates: Tracks multiple targets with precision.

Precise Classification: Easily distinguishes different aircraft types.

Low SWaP: Lighter and consumes less power than radar systems.

Daylight Dependency: Limited to daylight operations.

Weather Sensitivity: Performance hindered by fog, rain, or snow.

Shorter Detection Range: Detects objects up to 2.8 kilometers ground-based.

2. Radar-Based DAA Systems

Radar systems emit radio waves that reflect off objects, enabling the detection and tracking of obstacles and other aircraft.

MatrixSpace Radar™

Pros Cons

All-Weather & Nighttime Operation: Reliable in various conditions and low light.

Extended Range: Detects objects up to 3-3.5 kilometers.

Regulatory Familiarity: Well-recognized by aviation authorities.

High Cost & SWaP Requirements: Expensive and bulky.

Environmental Challenges: Affected by particulates and low-altitude clutter.

Public Acceptance: Concerns over privacy and interference.

3. Acoustic DAA Systems

Acoustic systems use microphones to capture the sounds of other aircraft, identifying and locating potential obstacles through sound analysis.

SquareHead Discovair G2

Pros Cons

Long-Range Detection: Detects aircraft up to 10 kilometers.

Low Power Consumption: Efficient for extended missions.

Passive Operation: No signal emissions, reducing interference.

Positional Accuracy: Limited ability to pinpoint exact locations.

Noise Impact: Performance degrades in noisy environments.

Limited Detection: Cannot detect non-aeronautical objects like balloons or gliders.

Comprehensive Situational Awareness

Recommended D&A Systems

Below are a couple of the top D&A systems we recommend. Trusted by departments, agencies, and companies with active deployments in the field, these Detect and Alert systems are crucial tools for in-air risk mitigation and remote BVLOS flights.


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MatrixSpace 360 Radar

Situational Awareness Comes Full Circle

MatrixSpace 360 Radar MatrixSpace 360 Radar

Achieve superior monitoring and detection regardless of lighting or weather conditions. Ideal for drone detection and crewed aircraft detection, as well as enhancing outdoor infrastructure security. With easy integration to established surveillance systems, 360 Radar is a highly portable multi-radar sensor stack based on a future-proof edge computing architecture and AI software scalability.

  • 5D Phased Array - Range, altitude, azimuth, velocity, time tracking, with dynamic clutter filtering
  • Edge Perception - AI-enabled classification, probability and more upgradable over-the-air
  • Enterprise Security - Embedded zero-trust security, policy-based expansion, zero-touch provisioning and more
  • Powerful Integration - REST, MQTT, ZMQ APIs for controlling and receiving target track data, long term track history retention

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Casia G

Ground-Based Detect and Alert System

Casia G Ground-based Detect and alert system Casia G Ground-based Detect and alert system

Casia G leverages the same AI and computer vision technology pioneered by uAvionix's (formerly Iris Automation) onboard systems – but stationary – to detect aircraft as they approach your UAS operation.

  • Detect Intruder Aircraft - Full optical, 360° field of view aircraft detection, classification (small plane, helicopter, drone, etc.) and alerting system
  • Gain Situational Awareness - Casia G can be integrated with your existing situational awareness tool to provide your Remote Pilot in Command (RPIC)
  • Network for Unlimited Range - Leverage multiple Casia G nodes in the form of a mesh network to cover large areas
  • Never Tired, Bored, or Distracted - Casia G is a ground based surveillance system that continually monitors the airspace to ensure your UAS operation is safe from intruder aircraft.

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MatrixSpace logo

MatrixSpace 360 Radar

Situational Awareness Comes Full Circle

MatrixSpace 360 Radar MatrixSpace 360 Radar

Achieve superior monitoring and detection regardless of lighting or weather conditions. Ideal for drone detection and crewed aircraft detection, as well as enhancing outdoor infrastructure security. With easy integration to established surveillance systems, 360 Radar is a highly portable multi-radar sensor stack based on a future-proof edge computing architecture and AI software scalability.

  • 5D Phased Array - Range, altitude, azimuth, velocity, time tracking, with dynamic clutter filtering
  • Edge Perception - AI-enabled classification, probability and more upgradable over-the-air
  • Enterprise Security - Embedded zero-trust security, policy-based expansion, zero-touch provisioning and more
  • Powerful Integration - REST, MQTT, ZMQ APIs for controlling and receiving target track data, long term track history retention

Learn more

MatrixSpace logo

Casia G

Ground-Based Detect and Alert System

Casia G Ground-based Detect and alert system Casia G Ground-based Detect and alert system

Casia G leverages the same AI and computer vision technology pioneered by uAvionix's (formerly Iris Automation) onboard systems – but stationary – to detect aircraft as they approach your UAS operation.

  • Detect Intruder Aircraft - Full optical, 360° field of view aircraft detection, classification (small plane, helicopter, drone, etc.) and alerting system
  • Gain Situational Awareness - Casia G can be integrated with your existing situational awareness tool to provide your Remote Pilot in Command (RPIC)
  • Network for Unlimited Range - Leverage multiple Casia G nodes in the form of a mesh network to cover large areas
  • Never Tired, Bored, or Distracted - Casia G is a ground based surveillance system that continually monitors the airspace to ensure your UAS operation is safe from intruder aircraft.

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Detect and Alert (D&A) Use Cases

Drone as First Responder (DFR)

DAA systems empower public safety agencies to deploy drones autonomously in emergency situations, reducing response times and enhancing situational awareness.

  • Use Case: Immediate dispatch of drones to assess emergencies.
  • Key Benefit: Ensures safety by autonomously avoiding airspace obstacles during critical operations.

Utility and Powerline Inspections

DAA-enabled drones perform detailed inspections of utility infrastructure, reducing the need for manual surveys and improving operational efficiency.

  • Use Case: Monitoring powerlines for wear, overheating, or damage.
  • Key Benefit: Expands inspection capabilities across vast or hard-to-reach areas.

Pipeline Inspections

Energy companies leverage DAA technology to ensure safe BVLOS flights for monitoring pipelines over long distances.

  • Use Case: Detecting leaks or structural issues in pipelines spanning remote locations.
  • Key Benefit: Enhances safety and reduces costs compared to manned aircraft or on-ground inspections.

Railway Inspections

DAA systems enable drones to autonomously monitor railway tracks and associated infrastructure, minimizing operational disruptions.

  • Use Case: Detecting obstructions, damage, or irregularities along rail lines.
  • Key Benefit: Enhances safety and supports preventive maintenance efforts.
Thermal drones for private and commerical security patrols

Private/Commercial Security

DAA systems support drones in conducting autonomous surveillance for perimeter security or high-value asset monitoring.

  • Use Case: Patrolling large areas to detect unauthorized activities or breaches.
  • Key Benefit: Improves security outcomes with reduced reliance on human operators.

Defense and Counter-UAS

Military and defense organizations leverage DAA systems to detect and avoid threats in contested airspaces.

  • Use Case: Monitoring airspace and neutralizing unauthorized drones.
  • Key Benefit: Enhances situational awareness and protects sensitive locations.

Choosing the Right D&A System

Selecting the appropriate Detect and Alert (D&A) system ensures safe and efficient Beyond Visual Line of Sight (BVLOS) drone operations. Here are the key factors to consider:

Technology Compatibility

D&A systems use a mix of cooperative and non-cooperative technologies:

  • Cooperative Systems (e.g., ADS-B): Designed for integration with manned aircraft systems, cooperative solutions ensure mutual communication between airspace users.
  • Non-Cooperative Sensors (e.g., radar, acoustic, and optical): Essential for detecting objects or aircraft without transponders. These sensors expand situational awareness, particularly in uncontrolled or high-traffic airspace.

Environmental Conditions

The operational environment significantly impacts system performance:

  • Radar: Reliable in all-weather and low-light conditions, making it ideal for diverse climates.
  • Acoustic Sensors: Best suited for low-noise environments with minimal ambient interference.
  • Optical Systems: Highly accurate in clear weather and daylight but limited in poor weather or low visibility.

System Design

The size, weight, and power (SWaP) requirements of DAA systems play a crucial role in system selection, especially for small drones:

  • Radar Systems: High SWaP demands may limit use on smaller UAS.
  • Acoustic and Optical Systems: Typically lighter and more power-efficient, making them better suited for drones with limited payload capacity.

Operational Range

The detection range varies significantly by sensor type:

  • Acoustic Systems: Detect objects up to 10 kilometers, ideal for long-range operations.
  • Radar Systems: Offer reliable detection within 3-3.5 kilometers, suitable for medium-range missions.
  • Optical Systems: Provide precise but shorter detection ranges (up to 2.8 kilometers for ground-based systems).

Budget

Budget is a crucial factor when selecting a D&A system:

  • Radar-Based Systems: Typically more expensive due to their advanced capabilities.
  • Acoustic Systems: A cost-effective option for low-noise environments.
  • Optical Systems: Offer a balance between price and performance but may require additional hardware for integration.

Regulatory Compliance

Regulatory approval is essential for BVLOS operations:

  • Ensure the system complies with FAA Part 107.31 requirements and is recognized by regulators for safe integration into controlled airspace.
  • Radar systems are often favored by regulators due to their proven reliability, while acoustic and optical systems may have fewer regulatory hurdles but require justification in high-traffic airspace.

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D&A Systems FAQ

What are Detect and Alert (D&A) systems, and how do they work?

Detect and Alert (DAA) systems use advanced sensors and algorithms to identify potential obstacles or aircraft in the airspace. These systems autonomously calculate collision risks and take action, such as altering the drone's flight path, to avoid hazards without human intervention.

What is the difference between cooperative and non-cooperative D&A technologies?

Cooperative DAA systems rely on other aircraft transmitting data, such as location and trajectory, using ADS-B or transponders. Non-cooperative systems detect aircraft or obstacles that do not emit signals by using technologies like radar, acoustic, or optical sensors.

What is the difference between Detect and Alert and Detect and Avoid?

Detect and Alert systems identify potential airborne hazards—using technologies like radar, acoustic, or optical sensors—and notify a human operator to take action. In contrast, Detect and Avoid systems autonomously detect obstacles and maneuver the aircraft away from them without requiring direct human intervention.

How do DAA systems enhance flight safety in Beyond Visual Line of Sight (BVLOS) operations?

DAA systems provide situational awareness and collision avoidance capabilities, allowing drones to safely operate beyond the pilot’s line of sight. They ensure compliance with regulations, reduce reliance on visual observers, and enhance operational safety.

What regulatory requirements must be met for BVLOS flights using DAA systems?

In the U.S., BVLOS flights require FAA Part 107.31 waivers, which mandate robust collision avoidance measures. Operators must demonstrate that their DAA system ensures safety equivalent to having a visual observer.

What are the key components of a D&A system?

Key components include sensors (radar, optical, or acoustic), onboard processing units, ADS-B receivers, and software algorithms to evaluate collision risks and execute evasive maneuvers.

What role do ADS-B sensors play in D&A systems?

ADS-B sensors allow drones to identify cooperative aircraft by receiving broadcasted location, altitude, and velocity data. This enables drones to track and avoid other aircraft operating in the airspace.

Can D&A systems be integrated with unmanned traffic management (UTM) systems?

Yes, DAA systems can integrate with UTM platforms to enhance airspace awareness, allowing seamless coordination with other airspace users and regulatory systems for safe BVLOS operations.

What types of obstacles can D&A systems detect and avoid?

DAA systems can detect various obstacles, including other aircraft (cooperative and non-cooperative), buildings, power lines, and even natural hazards like birds, depending on the sensors used.

How do D&A systems handle non-cooperative aircraft like ultralights or gliders?

Non-cooperative aircraft are detected using radar, optical, or acoustic sensors. These systems analyze signals or visuals to identify and track objects that do not emit ADS-B or transponder data.

What types of sensors are commonly used in D&A systems (e.g., radar, acoustic, optical)?

Radar provides long-range, all-weather detection. Acoustic sensors detect sound signatures and are effective in quieter environments. Optical sensors, like cameras, offer high precision but require clear weather and daylight.

How does a D&A system determine the "well-clear" zone and initiate evasive maneuvers?

DAA systems calculate the "well-clear" zone by analyzing the distance, speed, and trajectory of potential obstacles. If a collision risk is detected, the system autonomously alters the flight path to maintain safe separation.

What is the range and accuracy of radar-based D&A systems?

Radar-based DAA systems can detect objects up to 3-3.5 kilometers away. They are highly accurate in tracking multiple targets but may face challenges with low-altitude clutter or environmental interference.

How do EO/IR (electro-optical/infrared) sensors compare to other detection technologies?

EO/IR sensors offer precise classification of objects and are effective for low-altitude detection. However, they are limited to clear weather and daylight conditions, unlike radar, which works in all weather.

Are D&A systems effective in adverse weather conditions?

Radar-based DAA systems are effective in all-weather and nighttime conditions. Optical systems perform poorly in fog, rain, or snow, and acoustic sensors may struggle in high-noise environments.

What is the typical detection range for acoustic sensors in D&A systems?

Acoustic sensors can detect aircraft up to 10 kilometers away, making them suitable for long-range monitoring in quieter environments.

Can DAA systems handle multiple intruder scenarios simultaneously?

Yes, modern DAA systems are designed to track and manage multiple intruders simultaneously, using advanced algorithms to assess and respond to complex collision risks.

What are the budget considerations when choosing a D&A system?

Radar systems are typically the most expensive due to their advanced features. Acoustic and optical systems offer cost-effective alternatives for operators with limited budgets. Budget considerations should balance cost with operational and safety needs. Compare the cost of a DAA system vs hiring visual observers and RPICs.

How do ground-based D&A systems differ from onboard solutions for drones?

Ground-based systems monitor airspace from fixed locations and are ideal for centralized operations. Onboard systems are mounted directly on drones, providing autonomous collision avoidance during flight. Ground-based solutions often cover larger areas, while onboard systems are better for mobile, localized operations.