Page 41: of Maritime Reporter Magazine (February 1986)

ELECTRONICS

UPDATE

Texas Instruments

Offers New GPS Software —Literature Available

A new relative-positioning soft- ware package, called Geomark, de- signed to process data collected by

TI-4100 Global Positioning System (GPS) Navigators was recently in- troduced by Texas Instruments.

The Geomark software for GPS provides highly accurate postpro- cessing positioning information from data collected by two TI-4100

GPS Navigators simultaneously tracking the same four GPS satel- lites.

The TI-4100 is a satellite-based navigation system that provides precise absolute positioning or rela- tive point-positioning surveys, in- cluding aerial surveys, offshore plat- form positioning, marine navigation and oceanographic and geophysical surveys.

According to John Applegate, marketing manager, commercial

GPS, the introduction of the Geo- mark software gives the TI-4100 user a totally self-contained, on-site collection and postprocessing sys- tem that can be used anywhere in the world. "The software provides compre- hensive, documented solutions to relative positioning problems that were previously cumbersome and expensive," he said. "Additionally,

Geomark provides these solutions with much greater accuracy, speed, flexibility, ease and economy."

Accuracies are obtained using the broadcast ephemeris data recorded by the TI-4100 and do not require the use of precise ephemeris that some GPS systems must obtain from other sources, he added.

The Geomark software provides typical solutions in less than one hour of off-line processing using as little as 30 minutes of collected data, including data cassette translation.

Geomark offers totally automatic operation. Users may enter custom specifications by overriding the au- tomatic defaults. Users can also specify the reference location or derive the location using the TI- 4100. Geomark processes both Pre- cise Code (P-Code) or Coarse/Ac- quisition (C/A Code). The software uses broadcast empheris, but can also support post-mission precise ephemeris.

Geomark records all necessary data on a one-page report that pro- vides the user with the monument- to-monument baseline vector. The system can provide the answer in standard latitude, longitude, alti- tude; state plane; UTM; or local datum.

The complete TI-4100/Geomark package is available now and in- cludes Geomark and MS-DOS™ software. The package also includes the TI Portable Professional Corn-

February 1, 1986 puter with 256K bytes RAM, a mul- tifunction board with an additional 256K RAM, a single floppy diskette drive, a 10-megabyte Winchester hard disk drive, an 8087 coproces- sor, three-plane graphics board, a built-in high-resolution 9-inch color monitor, two Memtec cassette read- ers, two RS-232 cables, and the TI 855 microprinter.

For additional information about the TI-4100 and Geomark software, including detail-filled literature,

Circle 18 on Reader Service Card

THE FIRST AND SEVENTH—The Aleutian Key became the first semisubmersible oil drilling rig and seventh vessel to be drydocked at Beth- lehem Steel Corporation's floating drydock at the firm's new Sabine Yard,

Port Arthur, Texas. Inspected and repaired in November, the rig measures 260 feet by 200 feet by 111 feet high. In addition to the semisubmersible, the yard has serviced one jackup rig, four ships and a large barge. The floating drydock is one of the nation's largest and is said to be the only one in the world that can be configured in either a ship mode or a rig mode. jf^ JIM'S PUMP REPAIR INC. || rn ,„ated 48-55 36th STREET, LONG ISLAND CITY, NEW YORK 11101

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Circle 195 on Reader Service Card

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Circle 240 on Reader Service Card 43