MySatVis Help
Why Satellites Appear And Disappear
Understand the geometry and timing reasons satellites move in and out of view during a tracking session.
Horizon Limits
Satellites appear when they rise above your local horizon and disappear when they set below it.
Observer Location Matters
Changing location changes your viewing geometry, so pass paths and timing differ between observers.
Time Window Effects
A pass may be real but still outside your selected time window, which can make it look like the satellite disappeared.
Frequently Asked Questions
Is disappearing caused by bad data?
Usually not. Most apparent disappearances come from geometry, filtering thresholds, or time-window limits.
Can clouds affect pass visibility?
Yes. Cloud cover can hide visually trackable satellites even when geometry is favorable.