Galaxy IV outage (1998)
A telecommunications satellite lost attitude control on May 19, 1998, cutting off about 80% of US pagers along with radio and payment services, showing how whole economies can depend on a single satellite.
A geostationary communications satellite often serves thousands of customers who do not know which satellite carries their signals: paging operators, radio networks, payment terminals. When that satellite loses its pointing, all of them lose service at once, with no damage on their own premises. Galaxy IV put that mechanism in front of the public: its primary control processor failed, the switch to the backup failed, and the satellite rotated out of its pointing position. For a space insurer, the event is a classic total loss, settled on the value of the satellite. But the real economic loss lies elsewhere, with customers cut off from service, and it falls under contingent business interruption, rarely covered because the dependency was never identified. The case remains the reference for showing that concentrating capacity on a single orbital slot is an accumulation risk.
On May 19, 1998, at around 6 p.m. Eastern time, Galaxy IV, a PanAmSat satellite built by Hughes, lost attitude control; about 80% of pagers in the United States, some 40 million devices, stopped working, and the roughly 600 NPR member stations lost their network programming. PanAmSat declared the satellite lost on May 20 and moved its customers to other satellites over the following days.
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