Aerospace & Defense

Information Technology


Emerging Capabilities

Integrated Sensor Is Structure (ISIS)


Integrated Sensor Is Structure (ISIS) is a disruptive Command & Control, Intelligence, Surveillance and Reconnaissance (C2ISR) extremely large dual-aperture radar capability integrated in a fully autonomous stratospheric unmanned airship. This solar and regenerative fuel-cell powered, electric propulsion, extreme endurance stratospheric airship provides broad-area coverage using a dual-band (X- & UHF-Band) radar capable of detecting and tracking Air Moving Tracking Indication (MTI), Ground MTI, Dismounts MTI and Maritime MTI targets of interest; in addition prosecuting targets beneath foliage and Camouflage, Concealment and Deceptive (CC&D) cover with its UHF-Band FOPEN (Foliage Penetrating) abilities. Operating at 70,000 feet the inherent look-down CONOP becomes a low observable (LO) buster and increases combat identification of operating and inbound targets.

Concept of Operations

ISIS will have the ability to track a multitude of targets ranging from dismounts to ballistic targets. ISIS can track ballistic targets at ranges well beyond 1080 nautical miles (nm), air targets at ranges beyond 373 nm and ground/dismount/maritime targets at ranges of 186 nm. A single ISIS system can cover 5,507,560 nm2 as compared to a combined AWACS & JSTARS 153,348 nm2 coverage of the mission space. At a goal of 10 years of continuous airborne mission ISIS becomes the most affordable C2ISR asset in tomorrow’s DOD fleet. ISIS has developed a first of its kind dual-band extremely large light-weight Airborne Electronic Steerable Array (AESA), ISIS < 2kg/m2 compared to legacy AESA of > 6 kg/ft2. With an extremely large radar aperture ISIS requires a fraction of the power of what legacy small aperture radar would require to detect, track and provide fire control quality data to a myriad of users. Technical challenges have been met in regards to high strength-to-weight materials, ultra-lightweight antennas, antenna calibration technologies, solar and regenerative power systems. ISIS will demonstrate an integrated airship with sensor within 52 months of the undertaking of Phase III. This contract was awarded to a Lockheed Martin/Raytheon team in April 2009.


  • Provides simultaneous 3600 AMTI, DMTI, GMTI, MMTI and FOPEN engagements
  • Ten years on-station
  • Ninety-nine percent on-station availability
  • Globally re-locatable in fewer than 10 days

Key Features

  • Affordability: Greater than 75% less operating cost compared to legacy C2ISR assets
  • Operability: No forward based operational footprint required
  • Zero reliance on fossil fuels
  • Fulfills all COCOMs requirements for extreme endurance and Net Centric communications interoperability


ISIS cutaway

The ISIS program has developed extremely large light-weight, phased-array radar dual-band antennas

Integrated Sensor Is Structure

The ISIS stratospheric airship will provide distruptive C2ISR capability

ISIS cutaway

The ISIS program has developed extremely large light-weight, phased-array radar dual-band antennas