Air Defense

Fixed Site LIDS (FS-LIDS)

Also known as
  • FS-LIDS
  • Fixed-Site LIDS
  • Fixed Site LIDS
  • Fixed Site-Low, Slow, Small Unmanned Aircraft System Integrated Defeat System
  • Fixed Site-Low Slow Small Unmanned Aircraft System Integrated Defeat System
  • Low, Slow, Small UAS Integrated Defeat System

Fixed Site LIDS (FS-LIDS) is the U.S. Army's fixed-site Low, Slow, Small Unmanned Aircraft System Integrated Defeat System, built to protect bases and other static sites from small drones. Official SRC, RTX, Army, and U.S. arms-sale reporting describe it as a layered counter-UAS architecture that combines radar and EO/IR sensors, FAAD C2 command-and-control, electronic-warfare defeat, fixed Coyote launchers, and Coyote Block 2 interceptors.

Fixed Site LIDS (FS-LIDS), Fixed-site counter-UAS system, Air Defense
Image source: FS-LIDS offers key protection from drones
Profile / Specs

Profile

Origin
United States
Type
Fixed-site counter-UAS system
Service note
2020s-present
Unit cost
About $100 million per system, derived from a $1 billion Qatar package for 10 FS-LIDS systems

Specifications

System type
Fixed-site or fixed-relocatable counter-UAS system of systems
Deployment
Stationary support for installations, assets, sites, and critical infrastructure
Threat set
Group 1-3 small UAS, including single drones and swarms
Architecture
Modular open architecture over existing programs of record
Sensors
KuMRFS radar, AN/TPQ-50 multi-mission radar, direction-finding sensors, and EO/IR cameras
Electronic attack
SRC Counter Unmanned Aircraft Electronic Warfare System (CUAEWS)
Kinetic layer
Coyote Block 2 interceptors launched from fixed Coyote launchers
Command and control
Northrop Grumman FAAD C2-linked networked defense
Layered Counter-UAS Stack

FS-LIDS is documented as a fixed-site system of systems. The public sources describe a static or relocatable site-defense package in which radar and EO/IR sensors feed command-and-control, electronic warfare provides a non-kinetic defeat option, and Coyote interceptors provide a kinetic defeat layer.

Detection

KuMRFS, AN/TPQ-50, direction-finding sensors, and EO/IR cameras support detection, classification, and target tracking for small UAS.

Control

FAAD C2 links the sensor picture and defeat options into the Army's integrated LIDS architecture.

Defeat

CUAEWS supports electronic attack, while fixed launchers and Coyote Block 2 interceptors provide the kinetic layer listed in the Qatar FS-LIDS package.

Variants

LIDS is publicly described as a family of fixed-site, fixed-relocatable, and mobile counter-UAS configurations.

VariantConfigurationDesignation notes
Mobile LIDS (M-LIDS), Mobile counter-UAS system, Air DefenseMobile LIDS (M-LIDS)Mobile LIDS family member

RTX and SRC describe LIDS as deployable in fixed and mobile configurations; M-LIDS carries the mobile form of the architecture.

Sources: Meet the US Army's LIDS: A sure shot against drones, LIDS Family of Systems Brochure

Kinetic Defeat Layer

FS-LIDS uses fixed launch equipment and Coyote interceptors for the kinetic part of its layered counter-UAS architecture.

Compatible itemItem typeCompatibility evidence
Coyote counter-UAS interceptor / drone, Counter-UAS interceptor drone, Air DefenseCoyote counter-UAS interceptor / droneCounter-UAS interceptor

The Army says Coyote 2C integrates into fixed-site LIDS as a ground-launched, radar-guided interceptor, and the Qatar notification lists Coyote Block 2 interceptors in the FS-LIDS package.

Sources: Army announces rapid acquisition authority contract for Coyote Interceptors, Federal Register Qatar FS-LIDS arms sales notification

Fixed-site Coyote launcher, Fixed-site launcher for Coyote interceptors, Air DefenseFixed-site Coyote launcherFixed-site Coyote launcher

SRC says Coyote is launched from palletized fixed-site launchers, and the Qatar notification lists Coyote launchers with FS-LIDS.

Sources: LIDS Family of Systems Brochure, Federal Register Qatar FS-LIDS arms sales notification

Sensors And Control

The fixed-site system links sensor, command-and-control, and defeat layers rather than operating as a single launcher.

Compatible itemItem typeCompatibility evidence
KuRFS radar, Counter-UAS and counter-RAM radar, Support EquipmentKuRFS radarCounter-UAS radar

Army AL&T identifies KuMRFS as the kinetic-defeat radar used with Coyote in FS-LIDS, and RTX describes KuRFS as the LIDS detect component.

Sources: Innovation Draws International Interest, Meet the US Army's LIDS: A sure shot against drones, Federal Register Qatar FS-LIDS arms sales notification

Mobile LIDS (M-LIDS), Mobile counter-UAS system, Air DefenseMobile LIDS (M-LIDS)Mobile LIDS family member

RTX and SRC describe LIDS as a family that can be configured in fixed-site or mobile forms, with shared sensor, C2, electronic-warfare, and Coyote defeat layers.

Sources: Meet the US Army's LIDS: A sure shot against drones, LIDS Family of Systems Brochure

Timeline

Fixed Site LIDS (FS-LIDS) Key Events

  1. Army deploys LIDS to ARCENT area

    Army AL&T says the Army initially deployed LIDS to U.S. Army Central Command's area of operations in 2017.

    Sources: Innovation Draws International Interest

  2. Joint C-UAS Office selects FS-LIDS

    Army AL&T says the Joint C-UAS Office selected FS-LIDS and Coyote Block 2 as the initial DoD fixed-site and semi-fixed-site counter-UAS solution.

    Sources: Innovation Draws International Interest

  3. Qatar FS-LIDS sale notified to Congress

    The DSCA notification covered ten FS-LIDS systems, 200 Coyote Block 2 interceptors, CUAEWS, Coyote launchers, KuMRFS radars, FAAD C2, EO/IR cameras, support, training, and sustainment.

    Sources: Federal Register Qatar FS-LIDS arms sales notification

  4. Raytheon announces Army LIDS contract

    Raytheon said the $237 million Army contract included fixed-site and mobile LIDS systems plus Coyote effectors to support U.S. Central Command operations.

    Sources: Raytheon Technologies awarded $237 million counter-UAS contract

  5. Army announces rapid acquisition Coyote award

    The Army announced a rapid acquisition authority award for Coyote 2C interceptors and identified Coyote as a ground-launched, radar-guided component integrated into fixed-site LIDS.

    Sources: Army announces rapid acquisition authority contract for Coyote Interceptors

Media

Fixed Site LIDS (FS-LIDS) Videos

Fixed Site LIDS (FS-LIDS) Images

Fixed Site LIDS (FS-LIDS), Fixed-site counter-UAS system, Air Defense - view 1
Source: FS-LIDS offers key protection from drones
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Sources

FS-LIDS offers key protection from dronesPublisher: CENTCOM Citadel | Note: Supports FS-LIDS background, fixed-site counter-UAS role, component suite, Coyote integration, and image provenance for the article image. | Accessed: 2026-06-27SRC LIDS Counter-UAS TechnologyPublisher: SRC, Inc. | Note: Supports the SRC LIDS role, Group 1-3 UAS threat set, CUAEWS electronic-warfare layer, EO/IR camera context, event and airport protection videos, and LIDS brochure provenance. | Accessed: 2026-07-02Innovation Draws International InterestPublisher: U.S. Army Acquisition Support Center | Note: Supports FS-LIDS component composition, FAAD C2 role, CUAEWS and Coyote defeat layers, AN/TPQ-50 and KuMRFS sensor context, 2017 ARCENT-area deployment, Joint C-UAS Office selection, and LIDS family demonstration background. | Accessed: 2026-07-02LIDS Family of Systems BrochurePublisher: SRC, Inc. | Note: Supports SRC manufacturer context, the LIDS family background, and the fixed-site and mobile layered architecture described for the family of systems. | Accessed: 2026-06-27Meet the US Army's LIDS: A sure shot against dronesPublisher: RTX | Note: Supports the LIDS architecture, KuRFS and Coyote detect-and-defeat roles, fixed and mobile LIDS configurations, 2020 CENTCOM-area operation, 2023 fixed-site/mobile support contract context, and international interest/Qatar context. | Accessed: 2026-07-02Raytheon Technologies awarded $237 million counter-UAS contractPublisher: Raytheon Technologies | Note: Supports the April 19, 2023 Army contract for KuRFS and Coyote effectors, fixed-site and mobile LIDS systems, CENTCOM support context, and integration with FAAD C2 and SRC electronic warfare. | Accessed: 2026-07-02Qatar 22-36 CNPublisher: Defense Security Cooperation Agency | Note: Supports the Qatar FS-LIDS foreign military sales package, the ten-system quantity, the roughly $1 billion program value, and the principal-contractor context. | Accessed: 2026-06-27Federal Register Qatar FS-LIDS arms sales notificationPublisher: Federal Register | Note: Supports the Qatar FS-LIDS package quantities, component list, principal contractors, fielding/training support, and sensitivity descriptions for FS-LIDS, CUAEWS, Coyote launchers, Coyote interceptors, and KuMRFS. | Accessed: 2026-07-02Army announces rapid acquisition authority contract for Coyote InterceptorsPublisher: U.S. Army | Note: Supports the Army's Coyote interceptor background and the public-domain article image used in the gallery. | Accessed: 2026-06-27