Ground Track Visualizer
Visualize spacecraft ground tracks on a 2D map projection. See coverage patterns, revisit times, and ground station access windows for any orbit.
What It Does
The Ground Track Visualizer plots the sub-satellite point trace on a 2D Mercator map projection for any orbit. Configure orbital elements (altitude, inclination, RAAN, eccentricity), and the tool renders the ground track for multiple orbit periods. Overlay ground station locations to visualize access windows, and see how the track shifts over time due to Earth rotation and J2 perturbation.
Key Features
- 2D Mercator projection with orbit ground trace overlay
- Multi-revolution plotting showing track drift over time
- Ground station access window computation and visualization
- Support for circular and elliptical orbits with J2 perturbation
Why It Matters
Ground track analysis is essential for understanding mission coverage. Whether you are designing an Earth observation constellation, planning ground station contacts for a deep space relay, or verifying that your orbit provides the revisit rate your customer needs, the ground track is where orbit design meets mission requirements. Visual ground track analysis catches coverage gaps that pure numerical analysis can miss.
Calculator
Δλ per rev = −ω_E · T, repeat when k·T = m·(solar day)
Inputs
Result
What this does not model. Circular orbit, secular J2 only. The shift per revolution ignores the nodal regression itself, which is the right approximation for a single day and wrong over a season. A sun-synchronous orbit is the case where the regression equals 0.9856 deg/day.
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