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W W W. S O K K I A . N E T

Sokkia & GPS a solid and lasting relationship For decades, Sokkia has taken the lead in developing and marketing total surveying systems, encompassing all phases of the job from the field to the processing and analysis in the office. As one of the world’s foremost manufacturers of surveying equipment, Sokkia recognized the potential of GPS already in the late 80’s of the last century. Thanks to this early insight Sokkia has developed into a major player in the GPS industry.

In 1991 Sokkia introduced a GPS receiver unique for it’s time, the

have been introduced, all of which have found a successful way into

GSS1. Not much later it became clear that more benefit from GPS

the market. The newest in the line of Sokkia GPS receivers is the

technology would come from combining GPS and optical data.

GSR2700 IS; a high tech GPS receiver in which Sokkia has invested

This concept led to the first ever integration of GPS and ETS

all of it’s 85 years of innovation and creation. The GSR2700 IS

observations in the most innovative survey field book of it’s time;

features: reliable RTK performance with high update rate & low

the SDR33, a milestone in surveying.

latency, wireless technologies for cable-free operation, integrated data-link for radio and GSM/GPRS and a lightweight and rugged

In the new century, Sokkia has continued its strive to provide


surveyors around the world with accurate, easy to use and reliable

In order to further improve flexibility and productivity, Sokkia

GPS solutions. Over the last five years a number of new receivers

has introduced the ultimate successor of the well known SDR33 controller software: SDR+. The uniform GPS-ETS operating concept which Sokkia introduced back in the 90’s has been further improved and refined. SDR+ combines an intuitive workflow, powerful data management, true coordinate system flexibility and the most comprehensive editing capability on the market today. SDR+ is completely prepared to be the foundation for all surveying needs in the coming decade, able to integrate whatever upcoming new technology.

The combination of SDR+, the new GSR2700 IS GPS receiver and any of Sokkia’s total stations will give surveying an extra boost of accuracy, efficiency and flexibility!

Sokkia GPS milestones


Sokkia founded in Azabu, Tokyo as Sokkisha


Sokkia introduces the GSS1; an 8-channel L1 receiver for both static and kinematic surveys


Sokkia introduces SDR33 software that enables the combination of RTK and total station observations within the same Job


Sokkia introduces the Radian, a robust modular dual-frequency receiver for static and RTK surveys


Sokkia introduces the Radian IS, an integrated dual-frequency receiver with revolutionary PAC™ and Pinwheel™ technology


Sokkia introduces the Stratus, a fully integrated 12-channel L1 receiver for static and stop&go applications


Sokkia introduces the GSR2600, a modular version of the successful Radian IS


Sokkia introduces the GSR2650 LB, the world´s first Omnistar HP capable receiver


Sokkia introduces the GSR2700 RS, a unique GPS reference station allowing GPS data access 24 hours a day over the Internet


Sokkia introduces the GSR2700 IS & SDR+, a state-of-the-art GPS receiver and revolutionary new data collection software combining GPS and ETS in a uniform operating concept

GPS Systems GSR2700 IS Fully integrated L1/L2 GPS System

Easy to operate The GSR2700 IS features simple single-button operation and LED indicators for battery life, satellite tracking status, remaining memory and integer fixed occupation time. Ease of use of the receiver is

Full integration, total freedom

further supported by voice messages which indicate the receiver status during field operation. Easy to operate also means: easy to carry. The receiver is light weight which together with the ergonomic

Eighty-five years of experience, innovation and surveying knowledge,

design and cable free operation results in less fatigue and increased

combined with an enduring aim to provide worldwide surveyors with


reliable, high quality and easy to use GPS solutions resulted in an uncompromised symbiosis of form and function; The GSR2700 IS,

Complete system with SDR+

a new and fully integrated GPS system for the most demanding

The GSR2700 IS was designed to fully profit from the revolutionary

jobs. Equipped with modern technologies like Bluetooth® wireless

SDR+ data collection software. With SDR+, the GSR2700 IS can

technology, data link and power supply in a lightweight and durable

be swiftly configured for static, kinematic and RTK use. Or take

package this 24-channel dual frequency receiver with integrated

advantage of the system’s built-in EGNOS and WAAS capability to

antenna works more efficient than any Sokkia GPS receiver ever

provide real-time positioning without the need for a base station.


Because of its flexibility, the GSR2700 IS can be set up for multiple configurations.

Fully integrated design All system components are integrated in the GSR2700 IS’s lightweight magnesium alloy housing: dual-frequency receiver, PinwheelTM

Key features - GSR2700 IS

antenna, data-link, batteries, expandable memory and Bluetooth ®

wireless technology. The Bluetooth wireless technology allows for a completely cable free operation. No more cables to sort out, to connect

Cable-free, lightweight and rugged

and to disconnect. The internal data link is an optional UHF radio or

Flexible and easy operation

GSM/GPRS modem (dual band). The internal radio is both transmit

Multiple configurations

and receive; GSR2700 IS systems are completely interchangeable as

Powered by new SDR+ data collection software

base stations or rover units. Full flexibility guaranteed!

“The GSR2700 IS really is an exiting new GPS product. It includes all features you expect from a state-of-the art GPS receiver and it looks good too! The icing on the cake is the simultaneous introduction of the new SDR+ software. With SDR+ we can really profit from all of the ‘goodies’ the GSR2700 IS offers. Once again Sokkia proves its commitment to go forward with GPS and to provide surveyors with complete solutions.” Rob van Etten, Robert Schmitz GPS group, Sokkia BV European Headquarters

Stratus Fully integrated GPS System

pole drop. The operating temperature ranges from -40 ˚C to +65 ˚C. The Stratus comes with a heavy-duty, field-ready carrying case.

Accurate The Stratus is a 12 channel L1 receiver which can track both code

Low-level entry into GPS surveying

and carrier phase signals. The internal memory can hold 55 hours of continues static data (10s, 8 SV). Processing the data with Sokkia’s

The Stratus is a cost-effective, easy to use GPS receiver with a

Spectrum® Survey will generate sub-centimeter results. This accuracy

professional accuracy. The Stratus is a smart tool for static and

makes the Stratus a suitable tool for high demanding professional

kinematic surveys for baselines up to 25 km. The operation of the

survey applications.


Stratus is easy and flexible with the use of Windows CE software that is compatible with a variety of platforms, from a simple PDA to a

Post processing

rugged field book.

Spectrum® Survey is Sokkia’s solution for processing GPS data. It supports all phases of GPS survey operations including

Easy to use

planning, processing, analyzing and adjusting. Spectrum® Survey is

The Stratus is light, portable and easy to use. The unit is

compatible with all of Sokkia’s GPS receivers (as well as those

fully integrated with the receiver, antenna, batteries and memory

from a number of other manufacturers). Support for the RINEX V2

all in one housing. A display on the receiver provides all vital

format is included.

information: battery status, number of satellites, remaining memory and an occupation timer which helps to make surveying more time-efficient. The Stratus controller software can be installed on a range of different platforms. Communication between the

Key features - Stratus

controller and the receiver is wireless which eliminates the need for cables in the field. •



Easy to use

The Stratus is designed for tough field conditions. Its protective


ring makes the sealed housing rugged enough to withstand a 2.2 m

“For the survey of a building in Ludwigshafen near the river Rhein I used four Stratus receivers to create a control network. The measurements including processing and adjustment took me less then one morning. The easy plug and play setup, hot-swap long life batteries and value for money make the Stratus receiver the ideal instrument for these kind of jobs.” Hans-Peter Hefner, Surveyor Vermessungsbüro Hefner & Patzak Ludwigshafen, Germany

GPS Systems GSR2600 Modular L1/L2 GPS System

GSR2650 LB Versatile L1/L2 GPS System

A highly flexible GPS Solution

GIS to RTK, and everything in between

Sokkia’s GSR2600 is a dual frequency, survey grade receiver that can

The dual-frequency GSR2650 LB utilizes Egnos, OmniSTAR

perform both RTK and post-processed surveys and can function as

VBS and OmniSTAR HP corrections to achieve decimeter-

both base and rover. No software, hardware or upgrade modifications

level results as a stand-alone DGPS system and centimeter-

are required. The GSR2600 can achieve centimeter-level accuracy

level results as a kinematic (RTK) system. The rugged housing

for RTK jobs and millimeter-level accuracy for post processing

protects against shock, water and dust - extending the life of

jobs. These features, combined with the PAC™ and Pinwheel™

the GSR2650 LB receiver.

Technology, provide comprehensive tracking capability with complete multipath rejection.

As the first autonomous system for GIS/Mapping and surveying with

With a focus on efficiency, the GSR2600 system enables an individual

decimeter-level accuracies, Sokkia’s GSR2650 LB system sets a new

user to complete the toughest task, saving time and money. Designed

standard in GPS solutions. With a focus on versatility, the system

to work right out of the box and combined with Spectrum® Survey

enables the user to work from start to finish in less time, with fewer

and SDR+ software, the GSR2600 system provides high accuracy

people and with less cost. The system works with most RTK surveying

results. With a rugged waterproof and dustproof design, the system

software, such as Sokkia’s SDR+. The GSR2650 LB system is ideal

is ideal for a variety of applications, including topographic mapping,

for a variety of applications, including topographic mapping, roading

control surveys and construction staking.

and construction stake out.

Key features

Key features - GSR2650 LB

- GSR2600


EGNOS, OmniSTAR, RTK capable

Simple operation

Wide accuracy range

Lightweight & rugged

Lightweight & rugged

“Since May 2005 we successfully use a GSR2600 RTK system including a heavy duty Sokkia Allegro field book for creation of point fields and mapping inaccessible areas for cadastral purposes. We work in the middle of the mountains, near the Ukrainian border, which are heavily covered by forests. Sokkia’s GPS technology is a very powerful tool that efficiently helps in mapping this kind of terrain that is very difficult to access.” Ján Harmanos, Surveyor Geodet Snina s.r.o. Snina, Slovakia

GSR2700 RS Internet GPS Reference Station Access valuable GPS information via the Internet The GSR2700 RS provides the ideal easy way to establish a reference

information (number, DOP, etc.), and much more. The GSR Reference

station. The GSR2700 RS will log valuable GPS data and make this

Station Software is compatible with all Sokkia GPS Receivers.

data accessible from any computer with an Internet browser. The GSR2700 RS features a high precision, dual frequency GPS receiver, Pentium-based PC with 80 GB hard drive and a 19”rack mount. The Reference Station Software is pre-installed, but is compatible with all of Sokkia’s dual-frequency receivers.

Key features - GSR2700 RS

Reference Station Software Sokkia’s GSR Reference Station Software gives access to

Data access 24/7

valuable GPS data via the Internet 24 hours a day, seven days a

All hard- & software included

week. Accessible from any computer with an Internet browser, the

Compatible with a variety of Sokkia GPS antennas

software can be used to create custom data collection sessions and

GSR Reference Station Software pre-installed

log several sessions simultaneously, to perform remote uploads of

Built-in Ethernet port for easy connectivity

receiver firmware, to view graphical plots of current and past satellite

Includes a Pentium-based PC with 80 GB hard drive

19” rack mount to fit standard 19” PC equipment racks (rails included)

Where to use which receiver GIS Stratus GSR2600 GSR2650 LB GSR2700 IS GSR2700 RS

control point & densification


stake-out & construction

machine guidance

reference networks

GPS Software Spectrum® Survey Suite GPS post processing software

Key features - Spectrum® Survey Suite •

Set up GPS receiver parameters in the office and know ahead of time how many satellites are visible at what time of the day

Seamless post-processing, adjustment and planning software

Process single and dual-frequency GPS data (code and carrier)

An integrated GPS data processing and network adjustment environment makes it easy to process and adjust data in a few simple steps

Spectrum® Survey Suite is Sokkia’s flexible solution for GPS survey

Display data in geographic, state plane, UTM or user-defined coordinates. Compute and export data in ground coordinates

View and edit baselines before processing, either through menus or through the graphical interface

In-depth reporting of processing and analysis results in plots and test reports

Supports commonly used methods of survey data collection, including static, rapid-static, kinematic and stop-and-go

Compatible with Sokkia’s GSR2700 IS, Radian IS, GSR2600, GSR2650 LB and Stratus GPS receivers, along with other proprietary data formats, including RINEX

data analysis, processing and adjustment. Spectrum is compatible with all of Sokkia’s recent models of GPS receivers. Spectrum’s settings have been optimized to make processing easy for novice users, while giving advanced users the flexibility to modify and allowing them to experiment with these settings.

It’s a comprehensive, user-friendly, Windows® based postprocessing software package that supports all phases of GPS survey operations. It’s highly suitable for commonly used methods of survey data collection like static, rapid-static, kinematic and stop-and-go. Spectrum® Survey Suite combines Spectrum® Survey and Planning into one software package. This package provides all of the tools you need to successfully manage your project, from planning to processing and from adjusting to analyzing GPS survey data.

Baseline analyses

Planning & configuration

Loop closure & adjustment

S D R SDR+ Data collection software A new era in GPS & ETS data collection How to surpass the success of Sokkia’s SDR33, the unrivalled data collector which was a revolution for surveying in the 90’s? Now Sokkia has the answer: SDR+. Keywords for SDR+ are: total flexibility, total control and total freedom. SDR+: staking out a point

With its unique “live” database, SDR+ controller software defines a new era in data-collection. It provides all possible flexibility in collecting, viewing and editing your survey data.

Data management This powerful data management makes SDR+ unique. The database is coordinating all observed points and checking the tolerances constantly. When editing target details in, or adding new control points to the database, SDR+ will check previous observations automatically and will notify the user if there are points which breach their tolerances. This real time observation checking functionality is based on settings configured by the user. The user determines if and when breaches in tolerance are reported as warnings or errors

SDR+: taking a reading

depending on the application.

Customized workflow All observations and relevant accompanying data are stored in one

This makes it possible to observe backsights at any time and to

job and can be reviewed as plan view or list of data. Simple operation

occupy coordinated points later in the survey. All of this independent

helps navigating through the data and all necessary details. All

of what sensor is being used, total station or GPS.

frequently used options can be placed on the customizable toolbar. All of this is presented in a modern and intuitive looking touch screen Of course SDR+ offers the freedom to survey in any sequence. The software allows customizing the workflow, project and application settings and save them as a template for later use.

interface with both text and graphic display.

GPS Software


Stake out Simply load the design coordinates into the SDR+ database; Select the point either from the Plan view or job list for stake out. User definable thresholds will provide quick and easy guidance to the location. A complete and easy to read stake out screen presents information required for effective staking out the point.

Topography Simply define a station setup and bother about the details later. Back sights can be added at any time. The user decides whether to include them in the coordination of points or not. Setting up a SDR+: planview

RTK Base is not much different, SDR+ allows the user to enter the definite control coordinates at any stage of the job. Multiple ways of measuring offset points are available while original observations are always kept in the database. At any point in time the user can verify where your detail points are derived from.

Key features - SDR+ •

Total user flexibility

Flexibility in entering, collecting, and modifying survey data

“Live” coordinate update after editing

Easy control of the survey workflow

Modern color display and icons, easy to navigate screens and menus

Coordinate Systems

Coordinate system flexibility

SDR+ offers endless possibilities to define custom coordinate

Save frequently used settings in a template for re-use in other projects

Easy customizable projects, with integrated workflow

Broad pre-survey setup capability, reducing setup time in the field

Context-specific toolbar and tools menu give you shortcut access to frequently used settings and functions.

Ability to modify project and application settings during a survey

SDR+: current job settings

systems; projected, local grid or geographic. Creating custom ellipsoids and datums; entering datum transformation parameters and even defining relationships from one coordinate system to the other is easier then ever. Once defined, they can be used throughout all jobs and switches from one system to the other can be made instantaneously.

Controllers Sokkia Allegro CX Windows CE controller

Back in the office the user will appreciate the Allegro Power Dock (optional) which automatically charges it and enables a swift USB connection to an office PC. Sokkia’s new SDR+ software and the Allegro CX data collector

Rugged, cable-free data collector for GPS and ETS

provides the leading edge to get the most out of any Sokkia GPS receiver!

The Allegro CX is the ideal platform for any survey job. It offers performance, reliability, flexibility and is built to perform in the most demanding environments. It’s the ideal partner both in the field and in the office.

In the field the Allegro user will like the Allegro’s large display,

Sokkia JETT ce Windows CE controller Cost effective data collector for GPS and ETS

(monochrome or color), the clear keyboard with oversized numeric keys, the large and extendable storage capacity and the long-life ®

battery. The light yet rugged Allegro features Bluetooth wireless

The JETT ce is the cost-effective alternative for GPS and ETS surveys. It offers a unique one-hand operation, sunlight reading



technology which guarantees a flawless cable-free operation of

and integrated Bluetooth wireless technology. The JETT ce is the

your instrument.

affordable solution to meet a full range of survey requirements.

Other available GPS brochures

Sokkia GSR2600

Sokkia GSR2650 LB

Sokkia GSR2700 RS

Sokkia Stratus

Product brochure

Product brochure

Product brochure

Product brochure






Position accuracy 1 Static 3 Rapid static 3 Kinematic, stop & go 3 RTK 2



GSR2650 LB

GSR2700 IS

GSR2700 RS

5.0 mm + 1 ppm (horizontal) 10.0 mm +2 ppm (vertical) -

3.0 mm + 0.5 ppm (horizontal) 10.0 mm + 1ppm (vertical) 5.0 mm + 1ppm (horizontal) 10.0 mm + 1ppm (vertical) 10.0 mm + 1ppm (horizontal) 20.0 mm + 1ppm (vertical) 10.0 mm + 1ppm (horizontal) 20.0 mm + 1ppm (vertical) EGNOS/WAAS: 0.8 M CEP 12 x L1 and 12 x L2 with full code and carrier


5.0 mm +1 ppm (horizontal) 10.0 mm + 1 ppm (vertcal) -

10.0 mm + 1 ppm (horizontal) 20.0 mm + 1 ppm (vertical) 10.0 mm + 1 ppm (horizontal) 20.0 mm + 1 ppm (vertical) EGNOS/WAAS: 0.8 M CEP 12 x L1 and 12 x L2 with full code and carrier

3.0 mm + 0.5 ppm (horizontal) 10.0 mm + 1 ppm (vertical) 5.0 mm + 1 ppm (horizontal) 10.0 mm + 1 ppm (vertical) 10.0 mm + 1 ppm (horizontal) 20.0 mm + 1 ppm (vertical) 10.0 mm + 1 ppm (horizontal) 20.0 mm + 1 ppm (vertical) EGNOS/WAAS: 0.8 M CEP 12 x L1 and 12 x L2 with full code and carrier

12.0 mm + 2.5 ppm (horizontal) 15.0 mm + 2.5 ppm (vertical) -



Differental Channels

12 x L1 with full code and carrier

Time to first fix Cold / warm / hot start Signal reacquisition Data rate RTK Initialization 6

2 min / 40 sec / 15 sec 1 sec 1 Hz -

50 sec / 40 sec / 30 sec 0.5 sec L1, 1.0 sec L2 20 Hz 3-10-sec (typical) based on satellite constellation and baseline length PAC™ technology

50 sec / - / 0.5 sec L1, 1.0 sec L2 20 Hz 3-10-sec (typical) based on satellite constellation and baseline length PAC™ technology

50 sec / 40 sec / 30 sec 0.5 sec L1, 1.0 sec L2 20 Hz 3-10-sec (typical) based on satellite constellation and baseline length PAC™ technology

50 sec (typical) / - / 0.5 sec L1 and 1.0 sec L2 (typical) 20 Hz -

Single-button operation for power, receiver reset and clear memory LED displays status indicators


Radio link UHF5


Single-button operation for power, receiver reset and clear memory Front-panel LCD to view information and /modify parameters -



Single-button operation for power, receiver reset and clear memory LED display status indicators



GSM/GPRS Physical Weight / size Memory




Optional internal UHF 370 to 470 MHz options available (Tx/Rx) 10 km range (typical) 850/1800 MHz or 900/1900 MHz band, optional GSM/GPRS

0.80 kg / 15.5 cm x 12.5 cm 4 MB internal

1.3 kg / 18.3 cm x 15.0 cm x 7.0 cm 1.1 kg / 18.0 cm x 15.4 cm x 7.1 cm 1.5 kg / 22.5 cm x 10.0 cm Internal - 64 MB standard Internal, removable Compact-Flash memory card (16 MB card provided)

-40º C to +65º C -40º C to +85º C 2.2 m pole drop, 1.0 m stand alone infrared communications link, cable communications link

-40º C to +55º C -40º C to +85º C 1.0 m drop -


2x 3x External Bluetooth® adapter available -

2x 1x 1x

Internal +7.2 VDC, External +8 to +16 VDC 2 x BDC46 recharchable batteries

Multi sources power port (12 V car battery, AC/DC adaptor) Various power options

+7 to +15 VDC

Operating time

30 hours at +20º C

Varies with power option chosen

8 to 12 hours

Standard input/output


Antenna specs Operating temperature Storage temperature Weight Water resistance Shock and vibration

Integrated antenna -

RTCA, CMR, RTCM, NMEA-0183 out, 1 PPS (out), mark-in SK-600 LB -55º C to +85º C -55º C to +85º C 0.73 kg Equivalent IPX7 -

Phase center


Ground plane


L1 and L2 phase center in same location (zero offset) Choke ring-like performance Pinwheel™ technology to provide exceptional multipath rejection Built-in


Multipath performance

RTCA, CMR, RTCM, NMEA, 1 PPS (out), mark-in SK-702 -40º C to +85º C -55º C to +85º C 0.48 kg IEC 60529 IPX7 MIL-STD-810F method 514.5, Salt Spray: MIL-STD-810F method 509.4 L1 and L2 phase center in same location (zero offset) Choke ring-like performance Pinwheel™ technology to provide exceptional multipath rejection Built-in

Internal +10.8 VDC, External +9 VDC to +18 VDC Internal batteries standard, external batteries available rover: 10 hours with internal batteries and UHF radio, Static 14 hours with internal batteries and no internal radio usage RTCA, RTCM, CMR, CMR+, NTRIP, NMEA, 1 PPS (out), mark-in Integrated 700 series antenna IP67 -

110-220 V AC Power (nominal)


Receiver technology Interface Operation

Environmental Operating temperature Storage temperature Shock 4 Communication ports

RS-232 USB Bluetooth® Power Requirements Power port

1. 2. 3.

-40º C to +75º C -40º C to +90º C 1.0 m drop -

2 x 2300 mAh camcorder batteries

L1 and L2 phase center in same location (zero offset) Features an integral ground plane to reduce the effects of multipath Built-in

Accuracy depends on the number of satellites used, obstructions, satellite geometry (DOP), occupation time, multipath effects, 4. atmospheric conditions, baseline length, survey procedures and data quality. 5. 1 sigma 6. 95% confidence level

12 x L1 and 12 x L2 with full code and carrier

PAC™ technology


11.1 kg / 4.5 cm x 43.0 cm x 60.9 cm Internal hard disk

-40º C to +65º C -40º C to +85º C 2.0 m pole drop 1 x internal radio

+5º C to +35º C -40º C to +70º C Computer: 2 x Ethernet (10/100 MB and 1 GB LAN), 1 x parallel, 1 x VGA GPS, 1 x Antenna, 1 x External Oscililater (SMA) Computer 1 x, GPS 1 x 3x -


GPS-533 -55º C to +85º C -55º C to +85º C 4.1 kg Protective radome

Built-in choke ring -

Shock specifications based on receiver withouth cables attached Transmit mode. 1W unit RTK initialization time based on unobstructed observing conditions, 7 satellites and a baseline length less than 5.0 km

SOKKIA is preparing for future GPS system enhancements, such as L2C and L5. When future satellites begin broadcasting these new signals, an upgrade to the GSR2700 IS will be available, which will allow access to all GPS signals. SOKKIA’s line-up of surveying instruments includes everything from Global Positioning Systems (GPS), software, electronic total stations and distance meters, to electronic and optical theodolites, levels and laser products. Whether you’re involved in construction, building a highway, bridge or tunnel, or charting a nationwide map, SOKKIA surveying instruments and systems always provide the best solution. The Bluetooth® word mark and logos are owned by the Bluetooth SIG, Inc. and any use of such marks by [licensee name] is under license. Other trademarks and trade names are those of their respective owners. Designs and specifications are subject to change without notice. Sokkia is a trademark of Sokia Co., Ltd. Product names mentioned in this brochure are trademarks of their respective owners. Designs and specifications are subject to change without notice.

SOKKIA (EUROPE) B.V. Business park De Vaart, Damsluisweg 1, 1332 EA Almere, P.O. Box 1292, 1300 BG Almere, The Netherlands, Phone +31 (0)36 5496000, Fax +31 (0)36 5326241 BV-10/2005-GPS Overview-E Printed in the Netherlands © 2005 SOKKIA (EUROPE) B.V.

W W W. S O K K I A . N E T

Sokkia is a sponsor of the International Federation of Serveyors

Sokkia GPS Timeline and Brochure  

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