GPS Course

Lesson 1 • GPS System Architecture

Describes the three segments: space, control, and user. Connects segment roles to overall system reliability and accuracy.

Lesson 2 • Satellite Signals and Frequencies

Explains L-band frequencies, signal codes, and navigation messages broadcast by satellites. Builds the signal literacy needed for understanding positioning calculations.

Lesson 3 • Coordinate Systems and Datums

Covers WGS-84, geographic coordinates, and the concept of geodetic datums. Ensures students can interpret and convert position outputs correctly.

Lesson 4 • History and Purpose of GPS

Traces GPS from military origins to civilian adoption and explains its role in modern positioning. Provides context for understanding why GPS design choices were made.

Lesson 1 • Signal Quality Indicators

Interprets SNR, HDOP, VDOP, and PDOP values to assess fix quality in real time. Connects quality metrics to decisions about data acceptance or rejection.

Lesson 2 • Antenna Selection and Placement

Covers antenna types, gain patterns, and placement rules for optimal signal reception. Poor antenna setup is a leading cause of degraded accuracy.

Lesson 3 • Receiver Initialization and Acquisition

Explains cold start, warm start, and hot start acquisition modes and their time-to-fix implications. Connects initialization choices to field efficiency.

Lesson 4 • Types of GPS Receivers

Compares handheld, survey-grade, and embedded receivers by accuracy class and use case. Guides equipment selection decisions for different professional contexts.

Lesson 1 • Error Budgeting and Accuracy Prediction

Combines individual error sources into a total error budget using DOP and URE concepts. Enables students to predict and document expected accuracy before fieldwork.

Lesson 2 • Satellite and Receiver Clock Errors

Quantifies clock bias contributions from both satellites and receivers. Shows how clock modeling reduces systematic range errors.

Lesson 3 • Atmospheric Errors

Explains ionospheric and tropospheric delay mechanisms and their magnitude. Establishes why atmospheric correction is essential for precise positioning.

Lesson 4 • Multipath and Signal Obstruction

Analyzes multipath reflection geometry and its effect on pseudorange and carrier phase. Teaches field techniques and hardware choices to minimize multipath.

Lesson 1 • Post-Processing Differential Correction

Teaches offline correction using base station logs and rover data to achieve sub-meter accuracy. Covers software workflows and data format compatibility.

Lesson 2 • Satellite-Based Augmentation Systems

Covers SBAS networks that broadcast integrity and correction data via geostationary satellites. Students can enable and verify SBAS use on compatible receivers.

Lesson 3 • Ground-Based Augmentation Systems

Describes GBAS and CORS networks that provide high-accuracy corrections over regional areas. Connects network infrastructure to survey and precision agriculture workflows.

Lesson 4 • Selecting the Right Augmentation Method

Provides a decision framework comparing cost, accuracy, latency, and coverage of augmentation options. Prepares students to justify augmentation choices in project planning.

Lesson 1 • RTK Data Collection Workflows

Covers point, line, and area data collection methods using RTK with field controller software. Builds practical data collection skills tied to survey and GIS deliverables.

Lesson 2 • Ambiguity Resolution Techniques

Covers LAMBDA and other ambiguity resolution algorithms that fix integer unknowns rapidly. Connects resolution success to initialization time and baseline length.

Lesson 3 • RTK System Setup and Configuration

Walks through base station placement, radio link setup, and rover configuration for RTK. Ensures students can establish a working RTK link in the field.

Lesson 4 • Carrier-Phase Measurement Principles

Explains carrier-phase observables, integer ambiguity, and why they yield centimeter precision. Distinguishes carrier-phase from pseudorange-based positioning.

Lesson 1 • Accuracy Reporting and Metadata

Teaches how to document processing parameters, accuracy statistics, and data provenance. Produces professional-grade metadata that supports data reuse and audit.

Lesson 2 • Precise Point Positioning Processing

Introduces PPP as a standalone high-accuracy technique using precise orbits and clocks. Covers convergence time, accuracy limits, and online PPP services.

Lesson 3 • Coordinate Transformation and Projection

Applies datum transformations and map projections to convert GPS coordinates to local systems. Prepares students to deliver data in client-specified coordinate systems.

Lesson 4 • Raw Data Formats and Import

Covers proprietary binary formats, RINEX conversion, and data import into processing software. Ensures students can handle diverse receiver outputs without data loss.

Lesson 1 • Mobile GIS and Field Data Collection Apps

Integrates GPS receivers with mobile GIS apps for real-time field data collection and editing. Covers app configuration, offline maps, and data synchronization.

Lesson 2 • Spatial Data Quality Assessment

Applies positional accuracy testing against reference datasets to validate GPS-derived layers. Connects accuracy assessment to professional data quality standards.

Lesson 3 • Map Production from GPS Data

Guides layout design, symbology, and cartographic output using GPS-derived datasets. Produces professional maps that communicate spatial information clearly.

Lesson 4 • Feature Digitizing and Attribution

Teaches GPS-guided digitizing of points, lines, and polygons with attribute schema design. Builds skills for creating GIS-ready feature classes from field observations.

Lesson 1 • GPS Project Planning and Risk Management

Develops project planning skills including site reconnaissance, contingency planning, and schedule management. Prepares students to lead GPS projects from scoping to delivery.

Lesson 2 • Emerging Trends in GPS Technology

Surveys high-accuracy PPP-RTK, LEO augmentation, and anti-spoofing advances shaping GPS's future. Positions students to adapt workflows as technology evolves.

Lesson 3 • GPS for Unmanned Systems and Precision Agriculture

Applies RTK and SBAS GPS to UAV navigation and precision agriculture guidance systems. Covers autopilot integration, variable-rate application, and yield mapping.

Lesson 4 • GPS in Challenging Environments

Addresses GPS performance in urban canyons, forests, and indoor-adjacent areas. Teaches mitigation strategies and sensor fusion to maintain positioning continuity.