Spectra-precision Survey Pro v3.80 Recon GPS User Manual Manuel d'utilisateur

SURVEY PRO for Recon GPS User’s Manual 2003 Tripod Data Systems, Inc. All Rights Reserved

GPS User’s Manual 6 • Custom Datum Transformations Most North American and international datums are pre programmed into the Survey Pro coordinate sy

GPS Coordinates 7 • NGVD29 The first continental height datum in the United States was the National Geodetic Vertical Datum of 1929 (NGVD29). Accor

GPS User’s Manual 8 GreenwichMeridianEquatorφλXZYhCoordinate Systems A coordinate system is a way to describe positions in a datum. Coordinate syste

GPS Coordinates 9 • ECEF XYZ Geodetic coordinates are some times given in the Earth Centered Earth Fixed (ECEF) Cartesian coordinate system. This

GPS User’s Manual 10 Horizontal Coordinate Systems Survey projects use horizontal coordinates on either a local plane or a map projection. For small

GPS Coordinates 11 • Area A map projection is equi-areal when it correctly plots areas over the entire map. That is, all mapped areas have the sam

GPS User’s Manual 12 Lambert projections are used for about half of the State Plane Coordinate System zones in the USA. • Stereographic The Stereog

GPS Coordinates 13 Fig. 3: Transverse Mercator Mapping Plane A side view of the cylinder shows the effect of scale distortion. EllipsoidMapping Pla

GPS User’s Manual 14 Ellipsoid Scale Factor This scale factor accounts for the height of the ground above the reference surface (the ellipsoid). T

GPS Coordinates 15 Geoid Models in TDS Software Survey Pro has several geoid models in the coordinate system database. All of the geoid models use d

ii TRIPOD DATA SYSTEMS SOFTWARE LICENSE AGREEMENT IMPORTANT: BY OPENING THE SEALED MEDIA PACKAGE, YOU ARE AGREEING TO BE BOUND BY THE TERMS AND CONDI

GPS User’s Manual 16 Survey Pro Coordinate System Database Survey Pro uses a Coordinate System Database file (*.CSD) to store the map projection and

17 GPS Measurements This section gives a brief explanation of GPS measurements. First, a discussion of the basic theory of differential positioning w

GPS User’s Manual 18 Differential Solutions: Types and Quality Code Differential Code differential solutions use the Coarse Acquisition (C/A) naviga

GPS Measurements 19 Differential GPS with Survey Pro DGPS requires raw data measured from separate receivers to be combined into a single range diffe

GPS User’s Manual 20 RTK Settings If you are using Survey Pro for RTK, or RTK and post processing simultaneous data collection, the following cards o

21 RTK Data Collection RTK data collection uses differential GPS corrections broadcast by a base receiver to solve for coordinates at a rover receive

GPS User’s Manual 22 Projection Mode Summary Horizontal Ground - TDS Localization • Local coordinates are at ground level, based on the project heigh

RTK Data Collection 23 Note: If you are using Ground- TDS Localization for your horizontal projection mode, and you want to use a geoid, you only ne

GPS User’s Manual 24 Mapping Plane Setup Use the Mapping Plane Setup screen to either select a map projection zone from one of the zone groups, or se

RTK Data Collection 25 • Use the Key In Parameters button to open the Projection Key In Setup screen where you can configure a custom map projection

iii Table of Contents GPS Coordinates...2 Datums ...

GPS User’s Manual 26 • North\East Grid. Select this choice to have coordinates increase positive in the north and east directions. • South\West Grid

RTK Data Collection 27 Note: Note the sign of the datum shift and rotation parameters. Some datum transformations are given in terms of local datum

GPS User’s Manual 28 Remote Elevation If you set your base on a known benchmark, you can begin collecting data right away. However, if your base stat

RTK Data Collection 29 4. Occupy the benchmark with the rover and tap to access the Occupy Control Point screen and begin measurements to the point

GPS User’s Manual 30 Receiver Setup General Hardware Configuration 7. Connect the power cable or insert the internal battery into the GPS receiver. 8

RTK Data Collection 31 . If this is not the correct baud, then select the correct baud and tap . 16. Communications is now set. Tap Format for R

GPS User’s Manual 32 RTK rover, tap . This will automatically set the switch to Auto Connect RTK with saved configuration. When you tap or fro

RTK Data Collection 33 • A new point, or, an existing plane point when no projection is solved, we start from an autonomous position. You will GET a

GPS User’s Manual 34 GET Autonomous Base Position If you are starting from a new point in the job, you can GET an autonomous GPS position from the re

RTK Data Collection 35 Note: If this receiver has already set an antenna with Survey Pro, the measurement and settings will be recalled from the reg

iv Scale Factor Calculator...61 Convergence Calculator...

GPS User’s Manual 36 f. If your receiver does not support antenna height configuration, Survey Pro will attempt to calculate the height. You must ve

RTK Data Collection 37 Solve Localization When you start a GPS survey from an autonomous base position, you need to solve a Localization to adjust GP

GPS User’s Manual 38 Localization with Control Points Horizontal localization is a simple 2D similarity transformation from mapping plane coordinates

RTK Data Collection 39 Note: When you resolve the localization, all of your GPS measured points will automatically be recalculated based on the late

GPS User’s Manual 40 5. Check the Results tab for details of the previous measurement. Check the Map tab to see the number and position of control p

RTK Data Collection 41 12. For both horizontal and vertical, the solution type and RMS value from the control points are displayed. The solution ty

GPS User’s Manual 42 Manual Entry of Parameters Manual entry of parameters is used when you already know the appropriate horizontal and vertical loca

RTK Data Collection 43 Localization Parameters Explained Before you accept a localization solution, you should evaluate the parameters and the qualit

GPS User’s Manual 44 Mapping Plane Mode: Scale: is the scale difference between the intermediate mapping plane using the autonomous GPS position and

RTK Data Collection 45 Vertical Calibration and Geoid Modeling If you do not use a geoid model, vertical localization will solve for slope and sepa

Introduction This book is divided into two parts. The first part is the user’s manual. The second part is the reference manual. The users manual i

GPS User’s Manual 46 • Geometry of control points: the control points should be distributed evenly surrounding the survey area. • Check point

RTK Data Collection 47 Ground - TDS Localization Explained: When the horizontal projection mode is Ground - TDS Localization, a default map projectio

GPS User’s Manual 48 • When you collect geodetic measurements, each new point is assigned the set up group of the current base station. • When you se

RTK Data Collection 49 • Delta N and E are the translations between the desired local start coordinate and the origin of the TDS Localization map pro

GPS User’s Manual 50 6. Examine the results. The Rotation is the negative of meridian convergence between the central meridian of the selected map p

RTK Data Collection 51 RTK Data Collection Once your horizontal and vertical projections are solved, you are ready to collect data. The different me

GPS User’s Manual 52 Note: Raw data types + Rx Raw (and/or + OBN for Ashtech users) are only available when Receiver Dynamics is set to Static on oc

RTK Data Collection 53 Data Collection Methods Data Point Use this method if you want to occupy points one at a time. 1. Go to Data Collection from t

GPS User’s Manual 54 Offset Point Use this method if you cannot occupy a point directly, but you can occupy a location close by and provide an azimut

RTK Data Collection 55 Occupying a point on line with the reference point and the offset point. After you occupy the reference point, tap and th

2 GPS Coordinates To represent positions in space you need two things. First, you need a datum to define an origin, an orientation, and a scale. Seco

GPS User’s Manual 56 4. Tap . On the Feature Collection screen, select a Method. An explanation of the selected method is displayed at the bottom

RTK Data Collection 57 RTK Stake Out Stake out with GPS is very similar to stake out with conventional instruments. See the user’s manual for detail

GPS User’s Manual 58 Bluetooth Communication Survey Pro can communicate wirelessly with a supported receiver using a Bluetooth connection when the fo

RTK Data Collection 59 Bluetooth Limitations Bluetooth can be thought of as a short-range radio link. As with any radio link of this type, communica

61 Projection Utilities Projection Calculator You can use the Projection Calculator to calculate combined scale factor for scaling conventional dista

GPS User’s Manual 62 Convergence Calculator 1. Go to Projection Calculator from the Survey menu. 2. Choose a point on the mapping plane for converge

Projection Utilities 63 4. Tap . You will be warned that coordinates will be changed. If you are sure you are ready to proceed, tap . 5. The fina

GPS User’s Manual 64 5b. Tap to generate new GPS coordinates based on the plane coordinates. This action will change point records and you will

Projection Utilities 65 Note: If your projection is a localized site, then any errors in the localization solution will propagate through to the new

GPS Coordinates 3 Geocentric datums such as WGS84 use a rotational ellipsoid to model the shape of the earth. The WGS84 ellipsoid was based on and i

66 Managing GPS Coordinates with TDS Survey Pro for Windows CE uses a binary file with the extension *.job. A .JOB file point record will contain a

Managing GPS Coordinates 67 • GPS Control Point: You can ‘occupy’ a localization and hand enter a geodetic location. • GPS Check Point: You can ‘

GPS User’s Manual 68 Import a .GPS File You can use Import Coordinates from the Job menu to merge DOS control point measurements (in a *.GPS file) wi

Managing GPS Coordinates 69 Survey Link File Import To create a .CR5 or an ASCII text file from a .JOB file, go to Survey Pro CE Import/Export from t

GPS User’s Manual 70 File Export To create a .JOB file from either an ASCII text file or a .CR5 file, go to Survey Pro CE Import/Export from the Tran

71 Post Processing Data Collection Post processing data collection uses GPS raw data stored in the receiver’s internal memory. Raw data from multipl

GPS User’s Manual 72 Start Recording in Receiver 1. With the GPS Mode set to Post Process, go to the Survey menu. 2. Choose Start Static Rx. if you

Post Processing 73 file only, the site ID can be any valid name for the receiver and you are not prompted for layer or attributes. Note: If you are

GPS User’s Manual 74 Office Procedure 1. Use the software supplied by the receiver manufacturer to download the files from receiver internal memory o

75 Tutorial Jobs This section contains sample jobs to illustrate all of the main functions of Survey Pro GPS Module. Each job illustrates different

GPS User’s Manual 4 Below is a description of some common horizontal and vertical datums used by Survey Pro. Horizontal Datums • NAD27 The North Am

GPS User’s Manual 76 Scenario Your firm has done many jobs over the years at a particular site. You want to use your RTK system to generate new coor

Trouble Shooting 77 • Enter the antenna measurement for the rover. • Tap 5. Collect control points. • From the GPS Survey menu, tap Control Points

GPS User’s Manual 78 • The Delta values represent the shift from the TDS Localization stereographic zone false northing and easting (100000.0, 100000

Trouble Shooting 79 • Tap to configure the base station. Since the Localization adjustment is already solved, you will not be prompted to solve th

GPS User’s Manual 80 Reuse Localization Solutions Objectives This tutorial job will teach you: • How to reuse a localization solution in a new job. •

Trouble Shooting 81 • Go to Rover Setup. Set the rover 4. Check point • Go to Control Points and select point 3 for a . The results should be near

GPS User’s Manual 82 Procedure 1. Create a new job. • Enter 1 as the default starting point name and accept the default start location (5000, 5000, 1

Trouble Shooting 83 Mapping Plane with GPS and Conventional Measurements Objectives This tutorial job will teach you: • How to use GPS Stake Out. • H

GPS User’s Manual 84 record. You can also key in a custom map projection zone using the wizard. • Make sure Oregon North is still selected and tap

Trouble Shooting 85 • Stake out to Point 101 has now begun. Watch the design location move to the rover location, as you get closer. • Press to ac

GPS Coordinates 5 (ITRF). Because the earth’s center of mass and spin axis drift over time, you will often see the WGS84 datum followed by brackets

GPS User’s Manual 86 • Select a starting point and a direction. • Enter a horizontal distance in the Horz Dist field, tap the corresponding power but

Trouble Shooting 87 Trouble Shooting Hardware Configuration o You attempt to auto detect and the program fails to find the baud rate of the receiver.

GPS User’s Manual 88 o You attempt to change the radio channel on a radio that supports software breaks and you are still prompted to toggle the powe

Trouble Shooting 89 o You set up the rover and the Rx. Light on the rover radio is not blinking. Make sure the radio serial cable is connected. Mak

GPS User’s Manual 90 when you do a check point, the errors are larger than the instrument precision. Make sure you did not occupy the wrong control

91 References Books: The following books are available from various sources, including the America Congress on Surveying and Mapping: 5410 Grosvenor