GNSS positioning lab
Learn GNSS positioning.
Follow every number.
Step-by-step numerical learning for GNSS positioning algorithms.
Work from observation files to receiver coordinates, relative baselines and integer ambiguities. Inspect the equations, intermediate values and assumptions at each step.
From your first GNSS calculation to carrier-phase positioning
Start with the guided introduction if GPS time, RINEX records or line-of-sight geometry are new to you. Each published lesson states its inputs, units and limitations, so you can connect a formula to a computed value.
1. Single point positioningTrace GPS observations, satellite clocks, corrections and iterative weighted least squares.Open worked tutorial2. LAMBDA ambiguity resolutionFollow covariance decorrelation, integer search, candidate ranking and validation limits.Open worked tutorial3. Double differenceBuild a base–rover baseline from a real RINEX epoch, correlated observations and a float solution.Open worked tutorial