Mission and observations
Unlike a low-orbit weather satellite that travels across Earth's surface, a geostationary spacecraft orbits at Earth's rotational rate. That makes its apparent sub-satellite longitude change slowly, enabling frequent monitoring of clouds, storms and atmospheric conditions across its viewing region.
How to read the orbital position
CUPOLA tracks NORAD 51850 using orbital elements and an SGP4 estimate. A nearly stationary position on the globe is expected for a geostationary satellite; it is not a frozen animation. The availability and freshness of GOES imagery are checked separately from the position of the spacecraft.
Important distinction
The orbital marker is not a measurement of cloud conditions. CUPOLA's cloud layers have their own observational time and source provenance.
CUPOLA uses orbital elements and SGP4 to estimate position and ground track. These are mathematical predictions rather than directly measured real-time spacecraft coordinates. Old or unverified source data may prevent a current result from appearing.
Mission source
Read the spacecraft's scientific and operational background from the mission organization.
NOAA — GOES-R series ↗