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ADSC - Array Advanced Digital Scan Converter

The Array Advanced Digital Scan Converter (ADSC) is a multi-featured Weapon Replaceable Assembly (WRA) that processes radar returns from the sweeps of a spinning aircraft antenna and uses this data to generate images on a display screen.

The ADSC uses specialized Digital Signal Processors (DSPs) to produce images with several overlays in the following formats:

• Plan Position Indicator (PPI)
• A-Scan
• B-Scan
• Range-Azimuth-Sector (RAS)

This Weapon Replaceable Assembly (WRA) also performs Track-While-Scan (TWS) operation on up to 64 designated areas.

Array's ADSC manages all traffic to and from all of the external interfaces. The ADSC gathers aircraft navigation data (such as aircraft latitude, longitude, altitude, or heading with respect to North) and uses this information to generate one of the following displays:

• Ground-Stabilized
• Heading Up
• North Up

During Ground-Stabilized operation, ground stationary targets remain stationary on the display. Using Heading and North stabilized operation, stationary targets drift off of the display screen at the platform velocity projected to the slant range plane.

The Array ADSC includes the following key features:

• Capable of performing TWS operation on up to 64 designated targets with speeds of up to 100 knots
• Supports different antenna rotation speeds (from 6 RPM to 300 RPM) and can be configured to automatically adapt its processing to a variable antenna scan rate
• Supports different antenna scanning modes such as full scan (antenna scanning in a complete circle) or sector scan (antenna scanning back and forth over a designated area)
• Provides decay function that simulates the decreasing brightness of an analogue Cathode Ray Tube (CRT) display
• Provides functions to Freeze and Clear display
• Capable of overlaying Identification Friend or Foe (IFF) Symbols on the display screen based on IFF antenna returns
• Supports data exchange over either a Serial Manchester Interface or MIL-STD-1553B Interface
• Supports navigational data input from Embedded Global Positioning System/Inertial Navigation Set (EGI) over 1553B Interface
• Is well-integrated with Array's Tri-Mode Synthetic Aperture Radar (TriSAR) Processor and could be hosted on the same hardware platform