Viasat’s HaloNet: Eliminating Launch Telemetry Blackouts

Why It Matters

Continuous telemetry improves mission safety, enables optimized trajectories, and reduces risk and cost for an industry expecting up to 456 launches per year by 2030.

Key Takeaways

• HaloNet provides continuous launch telemetry via geostationary L‑band network.
• Eliminates blackout periods, enabling real‑time vehicle health monitoring.
• Dynamic beam‑hopping allocates bandwidth, supporting multiple simultaneous launches.
• Reduces reliance on aging TDRSS, lowering cost and scheduling constraints.
• Scalable to hundreds of launches yearly, complementing ground stations.

Pulse Analysis

Telemetry blackouts have long been a pain point for launch operators, forcing them to rely on intermittent line‑of‑sight links or the aging NASA Tracking and Data Relay Satellite System (TDRSS). As launch cadence accelerates, the limitations of TDRSS—high cost, limited scheduling flexibility, and an impending retirement—create operational bottlenecks that can jeopardize mission success. Viasat’s HaloNet directly addresses this gap by repurposing its proven L‑band maritime and aviation network, delivering a dedicated data relay path that follows a vehicle from pad to orbit without interruption.

The technical edge of HaloNet lies in its dynamic beam‑hopping and "dynamic lease" capability. Rather than assigning fixed antennas, the system continuously tracks a rocket’s trajectory, allocating bandwidth on‑the‑fly across overlapping geostationary beams. This approach not only supports multiple launches simultaneously but also ensures redundancy through multiple satellite hops and ground stations. The architecture mirrors the reliability of Viasat’s existing safety services, meaning launch providers can adopt the technology with minimal hardware changes while gaining real‑time telemetry that was previously unavailable over oceans or polar regions.

For the broader launch ecosystem, HaloNet promises a shift toward a new standard of continuous connectivity. By removing blackout zones, launch planners can design more efficient trajectories, increase payload mass‑to‑orbit, and reduce mission risk—all critical factors as the market projects up to 456 launches annually by 2030. Partnerships already in place with Blue Origin, Mitsubishi Heavy Industries, JAXA, and Skyrora signal industry confidence, and the service’s scalability positions it as a complementary layer to ground stations rather than a wholesale replacement. As commercial space matures, uninterrupted telemetry will likely become a baseline requirement, and HaloNet is poised to set that benchmark.