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7 Carrier Phase Data Collection 7.1 Introduction When you need to collect a feature with a precision better than 50 cm, you can configure the Asset Surveyor software to log carrier phase data. As this is an important feature, this chapter introduces you to the basic concepts involved, and then describes in detail how to collect and use carrier phase data. 7.2 Before You Begin The following sections discuss some of the concepts associated with using carrier phase data. 7.2.1 Why Use This Feature? In a conventional GPS session, the Asset Surveyor software logs independent GPS positions. If enough satellites are visible and the PDOP is low, it continues to log reliable positions. In a GPS session where the Asset Surveyor software logs carrier phase data, positions collected in the field can be postprocessed to generate more precise positions once you are back at the office. Because measurements are collected from each individual satellite, the positions generated during postprocessing are more precise than positions logged in the field. 162 TSC1 Asset Surveyor Operation Manual
7.2.2 Planning Carrier Phase Data Collection 7 You require a clear view of the sky at all times when collecting carrier phase data, so avoid obstacles such as trees, bridges, and tall buildings. Choose a time of day when you can expect to track a maximum number of satellites with the best possible geometry. Note – Always make sure that you collect sufficient useful data while you are in the field. This is discussed more fully in the following section. 7.2.3 Collecting Sufficient Data Always make sure that at least four satellites remain visible for enough time to provide sufficient useful data for postprocessing. Number of satellites To provide sufficient carrier phase data to achieve the required precision, the Asset Surveyor software needs to log data from at least four satellites for the minimum time specified. However, you must log data from at least five satellites for the postprocessing software to indicate the precision. These five satellites together provide the necessary redundancy for the precisions required—but you can use more. ‘Loss of lock’ occurs when the number of available satellites drops below four. If you minimize the number of times that loss of lock occurs during the session, you greatly increase the precision of the postprocessed results. As you start a session, the Asset Surveyor software starts to record carrier phase data. As soon as four or more satellites are available, a counter starts. When the specified Minimum time has elapsed, all of the carrier phase data recorded during that period can be used during postprocessing. TSC1 Asset Surveyor Operation Manual 163
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TSC1 Asset Surveyor Operation Manua
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Corporate Office Trimble Navigation
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Contents About This Manual 1 Quick
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Data Files . . . . . . . . . . . .
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7 Carrier Phase Data Collection Int
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B Pro XR System Introduction . . .
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Base Station Operation. . . . . . .
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Configuration for Use with the Asse
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About This Manual Welcome to the TS
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About This Manual Technical Assista
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1 Quick Setup In this chapter: ■
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1.2 Before Leaving the Office Quick
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1.5 Rover Configuration Quick Setup
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1.5.1 Data Collection Quick Setup 1
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1.6.1 Base Station Data Collection
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2 Introduction to the Asset Surveyo
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Introduction to the Asset Surveyor
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2.3 System Components 2.3.1 GPS Rec
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Introduction to the Asset Surveyor
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3 Introduction to the TSC1 Datalogg
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Function keys Backspace key Space k
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Introduction to the TSC1 Datalogger
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3.3.4 Menu Key 3.3.5 Next Key 3.3.6
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3.5.1 Choosing a PC Card 3.6 Reboot
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3.7 Data Capacity B Tip Introductio
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3.9.1 Battery Status Introduction t
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Introduction to the TSC1 Datalogger
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3.11Servicing Introduction to the T
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4 Before Leaving the Office In this
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Before Leaving the Office 4 The Qui
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4.3.1 Creating a Project Before Lea
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Before Leaving the Office 4 To star
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4.7 Data Files Before Leaving the O
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Before Leaving the Office 4 To ensu
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4.8 Data Transfer B Tip Before Leav
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4.8.2 Transferring Files to the TSC
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4.9 Configuring the System Before L
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B Tip Before Leaving the Office 4 T
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Table 4.2 Non-critical configuratio
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Table 4.3 Display configuration set
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5 In the Field In this chapter: ■
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In the Field 5 When you first start
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In the Field 5 If the Asset Surveyo
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In the Field 5 Note - The entire co
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In the Field 5 The skyplot is a gra
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In the Field 5 The Asset Surveyor s
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In the Field 5 You can perform a va
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Points Well sites Power poles Accid
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In the Field 5 Point features When
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In the Field 5 To segment a line fe
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In the Field 5 Reviewing features W
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B Tip In the Field 5 Repeating feat
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In the Field 5 To nest the updating
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In the Field 5 when driving along a
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B Tip In the Field 5 A line, area,
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B Tip In the Field 5 This form cont
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In the Field 5 When you have finish
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B Tip In the Field 5 The fields in
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In the Field 5 Feature icons Each e
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In the Field 5 Note - Changing a fe
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In the Field 5 You can use this for
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5.5.3 File Operations In the Field
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In the Field 5 To specify the filte
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In the Field 5 Searching In a large
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In the Field 5 Updating attributes
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Page 159 and 160: 5.8 Managing Data Files C 5.8.1 Del
Page 161 and 162: 5.8.3 Copying Files to and from the
Page 163 and 164: 6 Back in the Office In this chapte
Page 165 and 166: B Tip Back in the Office 6 Transfer
Page 167 and 168: Back in the Office 6 To transfer fi
Page 169 and 170: B Tip Back in the Office 6 4. From
Page 171 and 172: The Data Transfer dialog appears: B
Page 173 and 174: Back in the Office 6 6. In the list
Page 175 and 176: 6.4.1 Starting Differential Correct
Page 177 and 178: The Map window now displays this da
Page 179 and 180: Back in the Office 6 To export data
Page 181 and 182: 6.7 Batch Processor Back in the Off
Page 183: CHAPTER 7 7 Carrier Phase Data Coll
Page 187 and 188: Carrier Phase Data Collection 7 Tim
Page 189 and 190: Number of SVs 8 7 6 5 4 3 2 1 A Car
Page 191 and 192: Carrier Phase Data Collection 7 Alt
Page 193 and 194: 7.2.7 Postprocessing Carrier Phase
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Page 197 and 198: 7.4 In the Field Carrier Phase Data
Page 199 and 200: 7.4.2 Starting to Log Data Carrier
Page 201 and 202: 7.4.4 Logging Carrier Phase Data Ca
Page 203 and 204: Carrier Phase Data Collection 7 Ify
Page 205 and 206: 7.5 Back In the Office Carrier Phas
Page 207 and 208: 8 RTK Mapping In this chapter: ■
Page 209 and 210: RTK Mapping 8 While the RTK system
Page 211 and 212: RTK Mapping 8 The difference betwee
Page 213 and 214: C RTK Mapping 8 Warning - If you ar
Page 215 and 216: RTK Mapping 8 In the Asset Surveyor
Page 217 and 218: RTK Mapping 8 Note - You cannot der
Page 219 and 220: 8.2.5 Data Collection RTK Mapping 8
Page 221 and 222: RTK Mapping 8 Positions logged in R
Page 223 and 224: RTK Mapping 8 Selecting a site for
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Page 231 and 232: SC1 datalogger TSC1 data cable PWR-
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RTK Mapping 8 2. Assemble and erect
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The Real-time output options form a
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RTK Mapping 8 To ensure RTK correct
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RTK Mapping 8 8.3.7 Setting up a Ro
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8.4 In the Field RTK Mapping 8 Once
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RTK Mapping 8 Note - These port set
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RTK Mapping 8 8.4.3 Recording Less
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RTK Mapping 8 8.5.1 RTK Positions i
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B Tip RTK Mapping 8 - Use Filter by
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A Pro XRS System In this chapter:
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Pro XRS System A A.4 Configuring th
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A.5.3 RTCM Output Pro XRS System A
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A.6 Cabling Diagram Pro XRS System
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Pro XRS System A A.8 Activating Sat
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C Warning - Make sure that the 24-d
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B Pro XR System In this chapter:
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Pro XR System B B.4 Configuring the
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Pro XR System B If you require the
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B.6 Cabling Diagram Pro XR System B
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C ProXL System In this chapter: ■
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Pro XL System C C.5 Operational Asp
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C.6 Cabling Diagram Pro XL System C
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D Series 4000 In this chapter: ■
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Series 4000 D For Maxwell Technolog
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Series 4000 D If you have changed a
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Series 4000 D 3. Page through the v
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D.5.3 Overdetermined Positions Seri
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D.5.10 Receiver Outputs D.5.11 Velo
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D.7 Equipment List Series 4000 D Ta
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APPENDIX E E Site Surveyor 4400 Rec
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Site Surveyor 4400 Receiver E E.5 O
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E.5.7 Base Station Operation Site S
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E.7 Equipment List Site Surveyor 44
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F 4600LS Surveyor In this chapter:
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F.5 Operational Aspects Specific to
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F.5.6 Base Station Operation 4600LS
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4600LS Surveyor F Figure F.2 Two-po
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F.7 Equipment List 4600LS Surveyor
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G GPS Total Station 4700 In this ch
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GPS Total Station 4700 G G.5 Config
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G.6.6 Receiver Outputs GPS Total St
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G.8 Equipment List GPS Total Statio
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H GPS Total Station 4800 In this ch
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H.2 Switches and Indicator LEDs GPS
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H.4 Turning the Receiver On GPS Tot
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H.7.3 Real-Time Output GPS Total St
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H.9 Equipment List GPS Total Statio
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I Laser Rangefinders In this chapte
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Laser Rangefinders I Compass detail
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Laser Rangefinders I Cabling for th
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Laser Rangefinders I 2. Press the
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Laser Rangefinders I 5. Use the ←
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Laser Rangefinders I Entering a com
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Laser Rangefinders I I.2.5 Using th
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C Laser Rangefinders I Set the Type
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Laser Rangefinders I If you attempt
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B Tip Laser Rangefinders I 5. Press
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I.3 Laser Atlanta ProSurvey 1000 La
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Laser Rangefinders I Calibration of
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Laser Rangefinders I Select Externa
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Laser Rangefinders I Activating the
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C Laser Rangefinders I Checking the
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C Laser Rangefinders I Warning - Th
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I.4 Laser Atlanta Advantage Laser R
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Laser Rangefinders I Calibration of
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Laser Rangefinders I Configuring th
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Laser Rangefinders I If you attempt
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Laser Rangefinders I 3. Keeping a s
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I.4.5 Collecting Data The following
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Laser Rangefinders I Powering The L
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Laser Rangefinders I I.5.3 Configur
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Laser Rangefinders I You can press
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I.5.5 Collecting Data Laser Rangefi
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I.6.2 Accessories Laser Rangefinder
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I.7.2 Accessories Laser Rangefinder
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Laser Rangefinders I Testing When y
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J External Sensors In this chapter:
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External Sensors J You can configur
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3. Change the fields in this form a
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B Tip External Sensors J - After co
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J.3 Digital Cameras External Sensor
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3. Change the fields in this form a
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J.4 Echo Sounders External Sensors
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B Tip 3. Change the fields in this
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B Tip External Sensors J The Asset
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K NMEA Output Messages In this chap
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K.2 Common Message Elements NMEA Ou
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Longitude of ascension node Mean an
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NMEA Output Messages K Fields 3 to
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NMEA Output Messages K K.3.8 ZDA: U
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Index Symbols .ddf files 42 importi
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B back in the office 4, 141, 226 ba
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waypoints 68, 101, 135 in GPS Pathf
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File manager module 14, 137-140 fil
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I icons 97 update status 98 Import
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Info panels 133 proximity alarm 130
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echarging the TSC1 battery 32 recom
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statistics, on files 138 status bat
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Reader Comment Form TSC1 Asset Surv
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