Sokkia GPS

Available at Optical Engineering Co., Inc.

770-427-3116, S.E.WATS 800-282-7989, FAX 770-424-3488

Sokkia's Locus survey system sets a new standard for GPS surveying. Combining simplicity, affordability, reliability and accuracy, Locus is ideal for a variety of tough survey applications. Providing substantial productivity increases as a stand-alone solution or as a complement to traditional instruments, Locus is ideal for centimeter-level applications, such as control and boundary surveys. With a kinematic upgrade, Locus can take on additional applications such as topographical and as-built surveys.

Locus provides a complete system with state-of-the-art GPS receivers and integrated post-processing and adjustment software. With single button receiver operation and easy-to-use, comprehensive software, Locus is packaged for entry-level and experienced GPS surveyors alike.

A Complete Survey Package

The Locus survey system comes complete with everything you need for field data collection: receivers, tape measures, carrying cases, manuals even the batteries are included, and for working in your office, post-processing and adjustment software with an infrared device for transferring data. With the optional Kinematic kit, you receive the HP-48GX data collector, case, program card, pole mount and initialization bar. You can start surveying as soon as you open the package. To learn more about the Locus system, watch the comprehensive training video included with every system.

Integrated Receiver

By combining the receiver, antenna and communication interface into a single unit, Locus eliminates cables – all of them. Data is transferred and the receiver is controlled via infrared. With nothing to plug in, nothing to connect, you have no heavy equipment to haul. Locus weighs only 1.75 pounds, which makes it easy for one person to comfortably carry, set up and manage. In addition, Locus operates for up to 100 hours on common C- or D-cell batteries to perform a multitude of surveys effortlessly and economically.


Centimeter-Level Accuracy • Cable-free • Easy Operability

Static System

The Locus static system provides unparalleled ease of use and precision. Locus is capable of accuracies better than 1 cm. The convenient occupation time indicator ensures you have collected sufficient satellite data before you move to the next point. Locus can be fully utilized as a basic two-receiver static system or expanded to include three or more receivers.

Kinematic System

The Locus kinematic system is capable of dynamic data collection with shorter occupation times. Locus is ideal for high-productivity Stop and Go Kinematic surveys. The basic two-receiver kinematic system includes an initialization bar and a handheld controller with a program card, pole mount and environmental case. Use the handheld to enter point-specific attribute information for each site such as site ID, antenna heights and recording parameters.

Locus Handheld

The Locus HP48GX handheld with program card adds flexibility to your fieldwork. Required for kinematic surveys, or as an option for static surveys, the handheld controller is a valuable asset that provides detailed statistics on receiver operation and data collection status. As an option with a static system, the controller allows you to enter site information in the field, thereby removing this task from the person processing the data. The software program card fits snugly into the back of the unit for added convenience and versatility, making software upgrades easy.

Locus Processor

Running on a standard Windows® platform, Locus Processor provides data processing within a user-friendly graphical interface that provides a true representation of your fieldwork. The software is replete with quality analysis tools designed to ensure accurate and reliable results. Locus Processor features data processing, network adjustment, analysis tools, blunder detection and more. And with fully automatic processing, Locus Processor software consistently provides the best possible solutions without requiring you to manually process and manipulate data.

Locus Processor also includes several other features, including Mission Planning and Rinex data conversion. The Processor is comprehensive and intuitive, using three views of your data. The Map View displays the location of each point and allows you to graphically analyze the data such as loop closure analysis, site properties and more. The Time View indicates when each recording session took place, the receiver that recorded the data and all pertinent information about each point. The Workbook view contains all your survey information including data about each site and vector, control ties, loop closures, adjustment analysis and network relative accuracy. Use Locus Processor to create reports in a Rich Text Format suitable for any word processor of your choice.

Economical and Dependable

The Locus survey system is your one-stop solution for reliable results at an affordable price. Combining ease-of-use with proven Sokkia GPS technology, Locus is today's answer for smart surveying. Please contact Sokkia for detailed information about the Locus Survey System.



Unit Weight: 1 lb,12 oz
With C Batteries: 2 lb, 6 oz/1.1 kg
With D Batteries: 3 lb/1.4 kg
Height: 5.70 in./0.145 m
Diameter: 5.30 in./0.135 m

Internal Memory: 4 Mb
5 VDC with C-cell batteries
5 VDC with D-cell batteries
Up to 100 hours of operation with alkaline D-cells
Up to 50 hours of operation with alkaline C-cells
Status Panel: Four LED indicators for power, satellite tracking, memory and an Occupation Time Indicator
On/Off: Single button power on/off
Antenna: Integrated microstrip
Communications: Infrared communications link, cable- less operation 2400-57,600 baud rate
Certification: FCC and CD Mark approved


Operating Temperature: -20 to +65 C
Storage Temperature: -40 to +65 C
Weather: MIL-STD 810E approved
Shock: 2.2 meter pole drop


Horizontal: 5mm +1ppm
Vertical: 10mm + 2ppm (times baseline length)
Azimuth: <1 arc second


Horizontal: 12mm +2.5ppm (times baseline length)
Vertical: 15mm + 2.5ppm (times baseline length)
Occupation: 2 epochs minimum with 5 satellites

Sokkia L1 C/A code and full cycle carrier
Time to First Fix (95%):
Warm Start 54 seconds
Hot Start 12 seconds
Datalogging to Internal memory
Epoch Interval: 2 seconds to 999 seconds
(6 satellites): 12.5 hours @ 2 seconds
62.5 hours @ 10 seconds

(1) Infrared Communication devices
(1) Locus Processor software kit
(2) Height measuring systems
(2) Padded carrying cases
(2) Field survey cards
(2) Manuals


Two-Receiver Static System ------------------------- LIST ---$ 8995.00
Three-Receiver Static System ------------------------ LIST ---$13495.00
Two-Receiver Kinematic System--------------------- LIST ---$10195.00
Three-Receiver Kinematic System ------------------- LIST ---$15900.00


Additional Locus Receivers
Kinematic Upgrade Kit
HP-48GX Calculator with Locus Program card
Rugged Environmental Case


The Locus Processor is a new, Windows (R) based, automatic post-processing software package. It is extremely user-friendly, simplifying many of the office tasks, a fact which will be appreciated by novice and experienced users alike.

This powerful package includes components designed to assist you in all stages of planning and post-processing a GPS survey, including:


Project management
Network adjustment

Mission planning
Quality analysis

Receiver setup
Coordinate transformation

Data transfer
Report generation

Vector processing


Pentium 133 MHz or higher. Locus Processor runs on a slower Pentium or an older 486, but productivity will be impaired.

Operating system
Windows 95, 98, or NT 4.0 or later

Hard disk
35 MB for installation of Locus Processor software

32 MB recommended

Removable disk
CD ROM drive

Serial port
Spare serial port for data transfer between PC and receiver/handheld

Pointing device
Compatible pointing device

© 1998 Sokkia Corporation. Sokkia is a trademark of Sokkia Co., Ltd., Windows is a trademark of Microsoft Corporation.
All other trademarks are property of their respective owners.
¹Accuracies assume minimum of 5 satellites, following the procedures recommended in the product manual. High-multipath areas, high PDOP values, and periods of high activity atmospheric conditions will degrade accuracy. Post processing with Locus Processor™.

The Locus Processor integrates one of the fastest post-processing engines available, as well as superior blunder detection to ensure proper processing the first time. As the processing takes place, Locus Processor continuously updates a graphical display to provide a true representation of your fieldwork.

Need pricing? Call us at one of the numbers above or E-mail us here...

Copyright ©1999 by

Optical Engineering Co.,Inc

Last update 06/21/99

Prices and specifications subject to change without notice.