Arc Second and Automated Precision Announce Collaboration

Two Companies to Collaborate on Automatic Calibration Options for Constellation 3Di

DULLES, Va.--(BUSINESS WIRE)--Aug. 7, 2002--Arc Second, Inc., the leading provider of 3D-Intelligence products, and Automated Precision Inc, the inventor of the laser tracker and the 5D/6D interferometer, announced today their intention to jointly develop automated calibration techniques for Constellation 3Di, the world"s first proven indoor GPS system with the accuracy, reliability and utility to support large scale metrology.

According to Arc Second"s president and CEO, Edward Barrientos, "Many of Constellation 3Di"s customers need the ability to trace their measurement systems to primary standards. By combining Constellation 3Di"s automatic measurement capabilities with API"s world class interferometers, we are able to provide users with the ability to self-calibrate their indoor GPS system continuously."

"API has always been at the leading edge of new technology trends and we are excited to be working with Arc Second on making indoor GPS a reality," commented Dr. Kam Lau, President and CEO of Automated Precision, Inc. "Automatic self-calibration will provide Constellation 3Di with in-use accuracy advantages by neutralizing a variety of environmental factors that typically degrade accuracy in the factory environment."

About Constellation 3Di

Constellation 3Di was developed utilizing Arc Second"s proprietary 3D-Intelligence technology and is the first proven indoor GPS system with the accuracy, reliability and utility to support large-scale metrology. Using signals from transmitters that emit infrared light, small receivers can calculate their position coordinates independently.

Like GPS, the number of receivers in a single workspace is unlimited. Uses include the measurement and inspection of large tooling, sub-assemblies and infrastructure in the aerospace, automotive, rail, and shipbuilding industries.

Constellation 3Di is providing facility owners, metrologists, toolmakers and other users of accurate coordinate data with unparalleled flexibility in collecting critical metrology data. For more information about Constellation 3Di, log on to

About Arc Second, Inc.

Arc Second develops, manufactures and markets 3D-Intelligence (3Di) measurement and tracking products and mobile CAD software solutions. Arc Second markets its products to the construction, architecture, manufacturing, product design, forensics, aerospace, virtual reality and movie special effects sectors.

Founded in 1990, Arc Second is a privately held company located in Dulles, Virginia in the heart of the Northern Virginia technology corridor. For more information about Arc Second, go to

About Automated Precision Inc.

Automated Precision is a world leader of advanced metrology solutions for industry. Founded by Dr. Kam Lau in 1987, API has pioneered progressively higher standards of accuracy for coordinate measuring and machine tool operation. API holds the basic patents on the laser tracker and the 5D/6D interferometers which have become the standards for inspecting and certifying machine tools.

API products are installed and used by all of the world"s leading automotive, aerospace, machine tool, and CMM manufacturers. API"s experienced engineering team is unmatched in its ability to create advanced innovative products, which meet the needs of rapid evolving industrial technologies. For more information about API, go to

PocketCAD, Arc Second, and 3D-Intelligence are registered trademarks of Arc Second, Inc. Constellation 3Di, The Mobile CAD Standard and Indoor-GPS are trademarks of Arc Second, Inc. Other trademarks may be the property of their respective owners.

     Arc Second, Inc., Dulles
     Ms. Marg Donnelly, 703/435-5400 ext. 231
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