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7 Carrier Phase Data Collection<br />

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162<br />

Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162<br />

Why Use This Feature? . . . . . . . . . . . . . . . . . . . . . 162<br />

Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163<br />

Collecting Sufficient Data . . . . . . . . . . . . . . . . . . . . 163<br />

Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164<br />

What Is a Block of Data?. . . . . . . . . . . . . . . . . . . . . 166<br />

Recording Features. . . . . . . . . . . . . . . . . . . . . . . . 168<br />

Postprocessing . . . . . . . . . . . . . . . . . . . . . . . . . . 171<br />

Configuring the Asset Surveyor Software . . . . . . . . . . . . . . . 172<br />

In the Field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175<br />

Opening a Data File . . . . . . . . . . . . . . . . . . . . . . . 175<br />

Starting to Log Data . . . . . . . . . . . . . . . . . . . . . . . 177<br />

Starting a Feature. . . . . . . . . . . . . . . . . . . . . . . . . 178<br />

Logging Carrier Phase Data . . . . . . . . . . . . . . . . . . . 179<br />

Back In the Office. . . . . . . . . . . . . . . . . . . . . . . . . . . . 183<br />

Centimeter Processing Option . . . . . . . . . . . . . . . . . . 183<br />

8 RTK Mapping<br />

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186<br />

Introduction to RTK. . . . . . . . . . . . . . . . . . . . . . . . . . . 186<br />

Real-Time Kinematic Data Collection . . . . . . . . . . . . . . 187<br />

Satellite Signals and GPS Receivers . . . . . . . . . . . . . . . 189<br />

RTK Correction Messages . . . . . . . . . . . . . . . . . . . . 190<br />

Accuracy Considerations. . . . . . . . . . . . . . . . . . . . . 192<br />

Data Collection. . . . . . . . . . . . . . . . . . . . . . . . . . 197<br />

Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199<br />

Setting Up a Base Station . . . . . . . . . . . . . . . . . . . . 200<br />

Equipment Setup and Use . . . . . . . . . . . . . . . . . . . . 202<br />

Radios . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203<br />

Antennas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204<br />

Contents<br />

TSC1 Asset Surveyor Operation Manual ix

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