Ashtech Z-Surveyor Service Manual

Z-Xtreme GPS ReceiverSystem Guide for Post-Process SurveyingMagellan CorporationAshtech Precision Products471 El Camino RealSanta Clara CA 95050-4300P

2 Post-Process GPS Surveyingconsiderably so. RTK systems are somewhat more complex, requiringmanagement of a communication link between GPS receivers.

Introduction 3Introductionthe other(s). The positional relationship between the receivers is presented in theform of a vector, i.e. (delta X, delta Y,

4 Post-Process GPS SurveyingStatic data collection produces the most accurate and reliable results due to theamount of data collected during each obse

Introduction 5Introductionof one or more known points. If the survey included any redundant observations(closed loops, repeat observations), then a le

6 Post-Process GPS Surveyinglocation, 7-10 GPS satellites may be visible and available for use, although theGPS system does not require this many sate

System Components 72System ComponentsA GPS surveying system is made up of a number of components that, at firstglance, may seem a bit overwhelming. On

8 Post-Process GPS SurveyingThe Z-Xtreme supports an integral battery, removable PC card memory, andoptional internal radio. It is capable of function

System Components 9System ComponentsGeodetic IVThe Geodetic IV antenna, Figure 2.2, is the standard antenna offered.The Geodetic IV is small, lightwei

10 Post-Process GPS SurveyingChoke Ring AntennaThe choke ring antenna, Figure 2.3, is the ultimate antenna for multipathrejection.For points located i

System Components 11System ComponentsCompaq Aero Pocket PCThe Z-Xtreme Survey System offers, as an option, the Compaq Aero Pocket PC,Figure 2.4, a low

ii Post-Process GPS SurveyingCopyright NoticeCopyright © 2001 Magellan Corporation. All rights reserved.No part of this publication or the computer pr

12 Post-Process GPS Surveyingtemperature. For most users, the available power from the internal battery will besufficient. Figure 2.5 shows a typical

System Components 13System Componentspower source, the receiver should function un-interrupted for approximately 20hours at room temperature.630045.bo

14 Post-Process GPS SurveyingCable-to-User-Supplied Power SourceIn addition to the external power source, an optional cable is available to allowuse o

System Components 15System ComponentsThe Z-Xtreme Survey System offers, as an option, the following field applicationsoftware.Survey Control CESurvey

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Connecting System Hardware 173Connecting System HardwareAt this point, you should have an understanding of the function of each hardwarecomponent of a

18 Post-Process GPS SurveyingThe GPS antenna cable connects to the Z-Xtreme via a TNC type connectorfound on the back panel of the receiver. The prope

Connecting System Hardware 19Connecting HardwareHandheld Computer – GPS ReceiverThe optional handheld computer must communicate with the Z-Xtreme GPSr

20 Post-Process GPS SurveyingGPS Receiver – Receiver Power SystemSupplying power to the GPS receiver can be accomplished in two ways. The Z-Xtreme rec

Connecting System Hardware 21Connecting HardwareThe external power source can be connected at any time without concern of theinternal battery.This con

iiiSOFTWARE LICENSE AGREEMENTIMPORTANT: BY OPENING THE SEALED DISK PACKAGE CONTAINING THE SOFTWARE MEDIA, YOU AREAGREEING TO BE BOUND BY THE TERMS AND

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Survey Preparation & Execution 234Survey Preparation & ExecutionThe previous chapters laid the ground work for understanding the purpose of ea

24 Post-Process GPS SurveyingIn the kit bag you should find the Z-Xtreme GPS receiver, Geodetic IV antenna withtribrach adapter, antenna cable, HI mea

Survey Preparation & Execution 25SurveyingStatic Survey Prior to leaving the office to perform a GPS survey, check the following items:1. Check th

26 Post-Process GPS Surveying4. Ensure that each operator of a GPS receiver has blank GPS observation logsto utilize during data collection. Fill out

Survey Preparation & Execution 27Surveying3. Measure and record instrument height (HI) of GPS antennaRemember that measurements of satellite data

28 Post-Process GPS SurveyingDifferent GPS antennae will have different HI measurement points. For theGeodetic IV, the HI measurement point is the top

Survey Preparation & Execution 29Surveyinga new data file. Data will be recorded at an interval of 20 seconds, i.e oncevery 20 seconds, a data sam

30 Post-Process GPS SurveyingDetermine if the GPS receiver is observing satellites and storing raw data.This can be accomplished by either using the f

Survey Preparation & Execution 31SurveyingKinematic Survey When using the kinematic method of GPS data collection, one of the GPS receiversystems

iv Post-Process GPS SurveyingDISCLAIMER OF WARRANTIES AND LIMITATION OF LIABILITYLICENSOR AND ITS THIRD-PARTYSUPPLIERS MAKE NO WARRANTIES OR REPRESENT

32 Post-Process GPS SurveyingThe rover system for a kinematic survey is set up in a slightly different manner dueto the fact that kinematic data colle

Survey Preparation & Execution 33Surveyingantenna, as shown in Figure 4.7. A special mounting bracket for the handheldis included in the rover sys

34 Post-Process GPS SurveyingAs with performing a static survey, the only parameter that may require to bechanged is the recording interval. The recor

Survey Preparation & Execution 35SurveyingNow that the base and rover systems are configured, point location can begin.Using the rover system, you

36 Post-Process GPS Surveyingthe integer ambiguities. Once the integer ambiguities have been calculated, yourcurrent location can be determined very p

Survey Preparation & Execution 37SurveyingYou arrive on a new project site where you need to perform a kinematicsurvey. You set up the base statio

38 Post-Process GPS Surveyingon some arbitrary location. After two minutes, you are ready to begin locatingtopo points. You decide to start at the nor

Survey Preparation & Execution 39Surveyingwhile walking. The ability to determine positions while observing a feature for aperiod of time and the

40 Post-Process GPS SurveyingThe Stop&Go Kinematic method is more precise than the Continuous Kinematicmethod since multiple data samples are used

Troubleshooting 415TroubleshootingSo, you followed all the steps to prepare the Z-Xtreme Survey System to performa survey and the system is not workin

vTable of ContentsChapter 1. Introduction ... 1TheGlobalPositioningSystem(GPS)...2S

42 Post-Process GPS SurveyingGPS receiver does not track satellitesA satellite tracking LED on the front panel of the Z-Xtreme receiver displays thenu

Troubleshooting 43Troubleshooting2. Is the GPS antenna connected to the receiver?Look on the back panel of the receiver for a cable connecting the rec

44 Post-Process GPS Surveying1. Is the GPS receiver tracking satellites?The GPS receiver must first be tracking satellites before it can log data to m

Troubleshooting 45TroubleshootingThis concludes the troubleshooting section. If the tips given here did not help youto resolve your problem with your

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Index 47Reliance FundamentalsIndexNumericsNumericsNumericsNumerics1227.60 MHz, 21575.42 MHz, 2AAAAambiguities, 36as-built surveys, 5assumed coordinate

48 Post-Process GPS SurveyingGGGGGPS vectors, 3grid systems, 2HHHHheight of antenna, 8HI, 24, 29, 32HI tool, 27horizontal angle, 3horizontal position,

Index 49set of coordinates, 3severe obstructions, 26slope distance, 3stakeout, 1status information, 14TTTTtheodolite, 1TNC type connector, 18topograph

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vi Post-Process GPS SurveyingPost-ProcessingSoftware...15AshtechSolutions ...15Chapter 3.

viiList of FiguresFigure2.1. Z-XtremeGPSReceiver...8Figure2.2. GeodeticIVAntennawithoutandwithGroundplane...9

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Introduction 11IntroductionAlthough difficult to believe, it has been nearly 20 years since precise positioningusing the Global Positioning System (GP