Abstract: A test facility where geographic location, orientation, elevation, distance, attitude and altitude are known for every point provides a user with a way to test the accuracy and sensitivity of navigation or positioning equipment. The facility is formed by elevating a test track on a series of piers. The test track may curve, tilt, or spiral under itself. Further, the test track may proceed in known directions to allow easy verification of test vehicle parameters. In operation, a test vehicle moves around the test facility. On board the test vehicle, navigation or positioning equipment measures the parameters of the test vehicle. These measured parameters are then compared with known parameters. This allows a user to test the claimed accuracy or sensitivity of the equipment used.

Abstract: An activity based time accounting system consisting of a plurality of personal data collection devices (PDCD's) which are carried by selected users or workers during a predetermined use period, a central storage and processing facility (SPF) for receiving and storing each of the PDCD units in electrical interconnection during other than said use periods, and circuitry in said PDCD units for recording time accounting data for each of the selected users during each use period; and including collection circuitry for gathering all PDCD unit data during the other than said use periods for compilation and transmission for processing with business accounting software.

Abstract: The present invention is an improved data terminal for use in communication and testing of telephone lines which data terminal is operated by a 16-bit microprocessor operating under control of MS-DOS 5.0 program. The data terminal with operating computer and large plurality of telephone test functions is fully contained in a hermetically sealed, lightweight housing to enable easy field handling through data send and receive operations as well as the multiple of telephone line test operations. Power saving aspects of the invention include automatically adjusted LCD backlight control and LCD adjustment caused by large or abrupt temperature changes in the field. The system uses a large microprocessor with EPROM and random access memory with field programmable gating arrays offering virtually thousands of different gate logic decisions.