1. GPS and Inspection Basics

2. GPS Basics GPS = Global Positioning System GPS = Global Positioning System Requires minimum of 4 satellites’ signals. Requires minimum of 4 satellites’ signals. PDOP < 8 (dilution of precision) PDOP < 8 (dilution of precision) “R” for radio signal Realtime correction (or little tower symbol) “R” for radio signal Realtime correction (or little tower symbol) Trimble GPS unit with data collector (TDC1, TSC1, TDCe) or Trimble GeoXT, GeoXH, etc) Trimble GPS unit with data collector (TDC1, TSC1, TDCe) or Trimble GeoXT, GeoXH, etc)

3. Satellite Signals Number of satellites Number of satellites Location of satellites. Location of satellites. Trees and buildings block satellites. Trees and buildings block satellites. Satellites low on horizon not used. Satellites low on horizon not used. High PDOP = poor configuration. High PDOP = poor configuration. “Quick Plan”, in Pathfinder Office, to see satellite availability. “Quick Plan”, in Pathfinder Office, to see satellite availability.

4. Quick Plan: Satellites vs PDOP

5. Trimble ProXR Antenna Antenna Receiver Receiver Batteries Batteries Data collector Data collector

6. GPS Settings

7. Inspection Procedure Create Data File: Create Data File: Name it – MN23MP22.ssf Name it – MN23MP22.ssf Choose Data Dictionary – NewFeatV5.ddf Choose Data Dictionary – NewFeatV5.ddf

8. Data Dictionary is Important! Use NewFeat data dictionary for features new to HydInfra Use NewFeat data dictionary for features new to HydInfra Use ExistFeat data dictionary for features previously inventoried. Use ExistFeat data dictionary for features previously inventoried. Must have HydInfra ID Must have HydInfra ID Must have correct HydInfra ID Must have correct HydInfra ID

9. Begin Inspection at Feature Create New Records: Create New Records: Basic Session (always first) Basic Session (always first) T_SpStrucandInsp T_SpStrucandInsp T_PipeandInsp T_PipeandInsp T_StrucandInsp T_StrucandInsp

10. Data Collector Use arrow keys to choose menu items Use arrow keys to choose menu items Arrow down to next feature Arrow down to next feature Choose a letter to move to menu choice Choose a letter to move to menu choice Fill in all required fields Fill in all required fields Hit Enter to save the record Hit Enter to save the record Esc to not save the record Esc to not save the record

11. Most Common Mistakes No GPS location recorded No GPS location recorded Watch for message that no positions were recorded Watch for message that no positions were recorded If no location is recorded, the data will be lost If no location is recorded, the data will be lost

12. Pipe Inspection Report