Coverage · Iridium · United States
39.9526°, -75.1652° · nominal shell 780 km
Cross-linked LEO constellation, 66 active + spares, pole-to-pole coverage at 780 km.
Philadelphia is inside the primary service arc for Iridium. Expect frequent short passes and consistent gateway visibility.
[ Open the map centred on Philadelphia with Iridium highlighted → ]
https://www.iridium.com/ — official Iridium sign-up (affiliate link).