Why High Earth Orbit Satellites Are Re-Emerging as a New Layer in Enterprise Connectivity

This Industry Viewpoint was authored by David Idle, Bigleaf Networks CPO

For most of the last decade, enterprise satellite strategy has revolved around Low Earth Orbit (LEO) constellations. In the background, though, High Earth Orbit (HEO) systems—typically highly elliptical, high-apogee orbits such as Molniya and Tundra—are moving into serious consideration as another layer in the enterprise underlay.

The goal is not for HEO to “beat” LEO on latency. It won’t. The real conversation for network planners now revolves around where HEO offers a better cost-to-coverage trade, and how it fits into a multi-orbit design that already blends terrestrial, LEO, and fixed wireless.

LEO vs HEO: Understanding the Core Differences in Satellite Internet Architecture

LEO satellites orbit a few hundred to roughly two thousand kilometers above Earth, keeping round-trip latency in the tens of milliseconds and delivering near-terrestrial performance for real-time applications. The trade is architectural complexity: dense constellations, frequent handovers, extensive gateway siting, and sophisticated routing across a constantly moving mesh.

HEO sits at the opposite end of that spectrum. Highly elliptical orbits with apogees beyond geostationary altitudes linger for hours over a region, especially at high latitudes. Instead of hundreds or thousands of spacecraft, a small HEO constellation can provide persistent high-latitude coverage over broad, sparsely served areas such as the Arctic and offshore energy fields. Long dwell time and high look angle favor users who prioritize coverage assurance over ultra-low latency.

Latency is the key drawback. Signals that traverse tens of thousands of kilometers at apogee sit in the hundreds of milliseconds. Many enterprise applications tolerate that, such as SCADA, telemetry, logging, bulk transfers, while voice, real-time collaboration, and transaction-heavy workloads generally do not.

In design terms, LEO is a low-latency but operationally complex fabric. HEO is a coverage-first, latency-tolerant fabric that can be built and run with fewer space assets.

What’s Driving Interest in HEO Satellites for Enterprise Connectivity?

HEO is being pulled back into conversations for these two main reasons.

First, demand for high-latitude and remote-infrastructure connectivity is rising as energy, mining, maritime, and research operators push deeper into regions where GEO look angles degrade and LEO still has gaps or frequent handovers. HEO orbits were created to serve these latitudes, and early broadband forecasts for Molniya/Tundra systems reflect that demand.

Second, the underlay is becoming more heterogeneous and programmable. Modern SD-WAN and SASE platforms treat “orbit” as just another path attribute alongside latency, jitter, loss, and throughput. They steer flows across fiber, LEO, GEO, and HEO and react to live performance rather than static policy. This turns HEO from a specialist link into something the overlay can consume and optimize.

Once the overlay can classify applications and assign them to the right orbit, HEO’s limitations become manageable and its strengths compelling.

Connectivity in Hard-to-Reach Places: The Role of HEO in Rural and Critical Infrastructure

Rural and remote businesses still face limited terrestrial options, expensive backhaul, grid fragility, and long repair times. Even where LEO is installed, operators can run into capacity saturation, regulatory friction, or practical challenges in harsh environments.

Here, HEO offers distinct value. A single HEO beam can illuminate a wide area for long periods and acts as a regional resilience layer. A utility can use HEO capacity as shared backup for many rural substations and towers. A mining or energy operator can treat HEO as the backbone for telemetry, automation traffic, and safety systems across scattered sites, while reserving lower-latency LEO or microwave for interactive traffic.

High-latitude infrastructure is an even clearer fit. GEO coverage degrades as elevation angles drop near the poles. HEO orbits park apogee above those regions, with high look angles and fewer obstructions from terrain or structures. That geometry makes HEO attractive for Arctic shipping routes, remote sensing sites, defense installations, and research stations where “always some connectivity” matters more than “always low latency.”

Strategic Layering: Combining HEO, LEO, and Terrestrial Connections for True Internet Redundancy

For enterprises and service providers, the opportunity is to treat orbits as layers, not competitors. A resilient underlay might combine fiber or fixed wireless as the primary, LEO as the low-latency augmentation, and HEO as the slow but stubborn backbone that remains available when everything more fragile fails.

To make that work, complexity has to stay buried. Multi-orbit terminals and antennas must handle tracking, power, and band agility without turning every remote site into a science project, and gateways and spectrum coordination across constellations must mature so coexistence with terrestrial and satellite systems does not erode resilience. Integration into SD-WAN or SASE platforms must be deep enough that policy operates at the application level, not as a manual “flip to backup satellite” switch.

When that stack is in place, HEO becomes an anchor path for control planes, management access, and bulk or delay-tolerant services. It supports Day-1 connectivity for greenfield sites that will eventually gain fiber or 5G, letting enterprises light up operations on schedule and not on trenching timelines. It underpins command-and-control networks for public safety, defense, and disaster response that cannot depend on terrestrial survivability alone.

HEO will not be the right answer in every network design, and that’s not its purpose. Its strength lies in specific environments (large, remote, or high-latitude regions) where wide coverage and reliability matter more than ultra-low latency. In those cases, HEO provides a stable, long-lived safety net beneath LEO and terrestrial links, which continue to handle most of the interactive, latency-sensitive workloads.

Similarly, HEO is unlikely to generate the same headlines as blockbuster LEO constellations or satellite-to-phone deals. Yet for teams designing networks where downtime is measured in lost production, environmental risk, or safety incidents, it opens an important new option—a quiet layer that keeps the lights on when the obvious paths fail.

If you haven't already, please take our Reader Survey! Just 3 questions to help us better understand who is reading Telecom Ramblings so we can serve you better!

Categories: Industry Viewpoint · satellite