INTRODUCCION SISTEMA GNSS RTK EFIX

Review of EFE 4 F7 Equipment and FCU Controller

Introduction to Field Test

• The session focuses on a field test of the EFE 4 F7 equipment and FCU controller, emphasizing technical training for handling and interpreting data in Bogotá's dense weather conditions.

Overview of Equipment

• The training involves the EFE 7.004 click system and ACS reference data controller one from Fitz, noted for its robust design that protects against falls.

Receiver Features

• The EFE 7 receiver includes multiple LED indicators:

• Satellite LED: Blue light indicates satellite reception.

• RTK Mode LEDs: Two arrows indicate RTK operation.

• Static File Recording LED: Pages icon shows static file recording status.

• Battery Indicator: Red light signals battery status.

Configuration Options

• Key buttons include:

• Power button for turning on the device.

• Page button to initiate static mode without needing to access the collector directly.

• The equipment features a Type C port for charging and Wi-Fi capabilities for downloading configurations wirelessly.

Base Receiver Specifications

• The base receiver (F4) has similar LED indicators as the EFE 7, with additional ports for antenna communication, SIM card insertion, and charging/communication needs. It also supports Bluetooth and NFC technology for easy connectivity without cables.

Configuring the Data Collector

Initial Setup Steps

• Users must connect to their data collector software (EFE), ensuring proper connection to the receiver (903). A green checkmark confirms successful connection.

Project Creation Process

• When creating a new project:

• Set project name, author details, time zone (-5), and coordinate system (Bogotá Sirgas).

• Verify angle units are in degrees/minutes/seconds; horizontal/vertical measurements should be in meters.

Work Mode Configuration

• Users can establish work modes from scratch or select predefined options:

• RTK configuration.

Static Positioning Configuration

Setting Elevation Mask and Duration

• The elevation mask is set to mitigate multipath effects, with values between 5-10 degrees in flat areas and 15-20 degrees in steep mountainous regions. For this exercise, it is set at 10 degrees due to the urban environment.

• The duration for tracking time can be established based on seconds, with multiples of 60 being used for configuration purposes. This allows for automatic positioning adjustments.

Antenna Height Measurement

• The height of the antenna must be measured accurately; if using a stick, it will be verified against a standard measurement. A typical height of 180 cm is suggested for practical applications.

• If measuring from an inclined position or tripod, adjustments should be made accordingly to ensure accurate data collection from the measurement card inside packages.

Saving Configuration and Starting Recording

• The equipment will save a ring YX file in a compressed format compatible with various software versions (not older than version 3.0). This ensures accessibility across different platforms.

• After saving the configuration under a characteristic name (e.g., "static123"), users can initiate recording by confirming settings, which will trigger LED indicators every two seconds as confirmation of active recording status.

RTK Configuration Process

Static File Management

• To stop recording static files efficiently, hold down the designated button on the receiver until the LED indicator ceases flashing, confirming that data has been saved correctly. This process applies to both receivers involved in data collection.

Base and Rover Setup

• In RTK configurations, one receiver acts as a base positioned at known coordinates while transmitting corrections to a mobile rover receiver during surveys across various points within the area of interest. Both devices must be strategically placed for optimal performance.

Data Processing and Coordinate Systems

• The base receiver collects initial satellite information and sends RTK corrections to determine precise positions throughout surveying tasks; this requires careful setup of coordinate systems within project parameters to ensure accuracy in measurements taken from average points or recognized coordinates per second.

Finalizing Equipment Settings

Verification of Coordinate System

• It’s crucial to verify that the coordinate system aligns with required projections and ellipsoids as specified by relevant resolutions before proceeding with data collection activities; equipment typically comes pre-loaded with necessary configurations like CTM12 settings for ease of use during operations.

Manual Base Configuration

• Users are guided through creating new work modes from scratch rather than relying solely on presets; defining manual base settings ensures tailored configurations suited specifically for each unique survey scenario encountered during fieldwork activities involving geodetic measurements and assessments.

RTK Configuration and Setup Process

Internal Radius Correction Format

• The internal radius correction format involves an X protocol similar to the frequency list for SHC protocols, allowing easy connection with HC teams by selecting the X option.

Equipment Settings

• The system operates at a step value of 25,000 Hz, with channel 1 set to a frequency of 456.5 MHz. Sensitivity is prioritized for effective operation in dense vegetation.

Environmental Conditions

• An elevation mask is selected at 10 degrees; static options are turned off to conserve battery life while tracking averages for position determination.

Manual Coordinate Entry

• Users can manually input coordinates if known, specifying point types (normal, topographic, or base). This includes entering North-East and Z coordinates.

Tracking Averages and Data Collection

• The equipment tracks averages (set to 10), displaying data on-screen as it processes information to establish coordinates in various formats before saving them.

Base Station Configuration

Base Station Setup Confirmation

• Once coordinates are established, the system transmits data to the rover. After configuration, users confirm base station activation through LED indicators showing stable RTK correction.

Rover Configuration Steps

• The rover's serial number (452) and antenna type (17) are selected for connection. Successful connection leads to fixed status due to matching configurations between base and rover.

Rover Work Mode Creation

Mobile Auto Work Mode

• A new work mode is created for the rover with RTK enabled. Key settings include mobile auto mode and a fixed step value of 25 keyloggers at a frequency of 456.05 MHz.

Elevation Mask and Frequency Consistency

• The elevation mask remains set at 10 degrees; operational limits can be modified as needed while ensuring that frequencies match those configured in the base station.

Finalizing Rover Settings

Saving Rover Configuration