Which national security space missions are typically flown in a Molniya orbit?

• A. Weather.
• B. Navigation and surveillance.
• C. Communications and surveillance.
• D. Reconnaissance and missile warning.

Answer: (C)

Molniya orbits are highly elliptical with a high inclination and a ~12-hour period, so the satellite spends a long, slow pass over high latitudes, especially near apogee over the northern hemisphere. That long dwell time over northern latitudes makes it ideal for keeping reliable communications links with ground stations and assets in those regions, as well as for persistent surveillance of polar areas where other orbits offer limited and less stable coverage. In national security terms, this combination—prolonged visibility and reach to northern regions—makes communications and surveillance the typical missions suited to Molniya orbits. Weather satellites usually favor geostationary or polar sun-synchronous paths for global, timely data; navigation satellites rely on mid Earth orbits for global navigation signals; recon and missile warning use other orbital configurations tailored to broad, continuous global coverage.