How to use GPS RTK for Surveying | Global Positioning System with Hi-Target V30

Summary

This training session on GNSS surveys focuses on GPS RTK technology, explaining the roles of the Base and Rover receivers. The Base remains stationary to collect satellite signals, while the Rover moves to gather data. The session covers setup procedures, including connecting devices via the Hi-SurveyRoad app, creating projects, and marking positions for data collection. After fieldwork, participants learn how to download data in CSV format and organize it using Excel. The video highlights the importance of ensuring accurate data collection and positions GPS RTK as an effective alternative to traditional total stations.

Takeaways

• 😀 GPS RTK surveying involves two receivers: a Base, which remains stationary, and a Rover, which collects data while moving.
• 🛠️ To set up, install the Base first, ensuring it's centered, and then set up the Rover on a pole.
• 📱 The Hi-SurveyRoad application is used to connect the controller to both the Base and Rover receivers.
• 📊 Projects can be created within the Hi-SurveyRoad app, allowing users to set relevant projection and coordinate system details.
• 📡 It's essential that both the Base and Rover receivers have antennas and are configured to the same radio frequency for proper communication.
• 🔍 The Base receiver must have its height set accurately and can either record its position automatically or allow for manual input.
• ✔️ The status 'RTK Fix' indicates that the Rover is ready to collect accurate coordinate data.
• 🚶‍♂️ To collect data, use the 'Mark' function while ensuring the RTK status is fixed to maintain data integrity.
• 💾 After fieldwork, data should be transferred to a specified project directory, ideally in CSV format for ease of analysis.
• 📈 Data can be cleaned up and organized in Excel, using features like 'Text to Column' to separate entries for better clarity.

Q & A

What is the primary purpose of GPS RTK in GNSS surveying?

The primary purpose of GPS RTK is to provide real-time accurate positioning by using two receivers: a stationary Base to collect satellite signals and a Rover that moves around to gather data.

How does the setup process for GPS RTK differ from static GNSS surveying?

In GPS RTK, the setup involves two receivers (Base and Rover), whereas static GNSS typically uses one stationary receiver for data collection.

What steps should be taken to ensure the Base and Rover receivers are ready for use?

First, install the Base receiver properly and ensure it's centered, then install the Rover. Make sure both receivers have antennas and that their radio frequencies match.

What is the significance of RTK Fix on the controller during surveying?

RTK Fix indicates that the Rover is connected properly to the Base and is ready to collect accurate coordinate data without floating errors.

What should be done if definitive coordinates for the Base are not available?

If definitive coordinates are not available, the user can utilize the automatic alignment feature of the receiver to obtain approximate values.

How do you transfer collected data from the RTK GPS to a computer?

After completing the survey, turn off the Base and Rover, then transfer the data from the controller to the designated project directory on a computer, typically in CSV format.

What is the purpose of using the Hi-SurveyRoad application in this process?

The Hi-SurveyRoad application is used to manage the project settings, connect the Base and Rover receivers, and facilitate data collection during the RTK GPS survey.

What are some common statuses for the collected data points, and what do they indicate?

Common statuses include RTK Fix, indicating good accuracy; Float, indicating lower accuracy; and DGPS, meaning data is collected but not within acceptable accuracy tolerances.

What feature in Excel can be used to tidy up the imported CSV data, and how does it work?

The 'Text to Columns' feature in Excel can separate the data into different columns using delimiters like commas, making the data more readable and organized.

In what ways can RTK be beneficial compared to traditional surveying methods?

RTK offers higher accuracy, real-time data collection, and can replace traditional Total Stations, providing more efficient surveying capabilities.