December 15, 2017 Germany Launches Communication Satellite

You're close on the date, but Germany didn't launch a communications satellite on December 15, 2017. What actually happened was on December 14, 2017, Germany signed the launch contract for the Heinrich Hertz satellite. Built by OHB System AG, it's a geostationary platform designed to test roughly 20 military and civil communications experiments. The actual launch came much later than originally planned. There's quite a story behind this mission's development, delays, and ultimate outcome.

Key Takeaways

Germany did not launch a communication satellite on December 15, 2017; instead, a launch contract was signed on December 14, 2017.
The contract signed in December 2017 was for launching the Heinrich Hertz satellite aboard an Ariane 5 rocket.
Heinrich Hertz is Germany's first dedicated satellite program, built by OHB System AG, weighing approximately 3.5 tons.
The satellite was designed to validate next-generation communications technology through roughly 20 civil and military experiments.
The initial target launch was Q4 2021, significantly later than the 2017 contract signing date.

The Heinrich Hertz Mission: Germany's Dedicated Communications Satellite

Germany's Heinrich Hertz Mission marks the country's first dedicated satellite program for testing new communications technologies in space. Built by OHB System AG in Bremen, this 3.5-ton spacecraft will operate in geostationary orbit roughly 36,000 km above Earth. You can think of it as a technology validation platform rather than a standard commercial relay satellite.

DLR signed the manufacturing contract with OHB on June 28, 2017, and OHB followed with a launch contract with Arianespace on December 14, 2017. The satellite will launch from Kourou, French Guiana, aboard an Ariane 5 rocket, targeting Q4 2021.

Carrying around 20 experiments, the mission advances Germany's satellite communications capabilities across both civil and military objectives, supporting secure infrastructure for the future.

Why Germany Needed Its Own Dedicated Communications Satellite

As a global leader in engineering and technology, Germany needed a dedicated platform to test and validate next-generation satellite communications before committing to full operational deployment. Without technology validation in an actual space environment, you can't reliably assess how advanced antennas, high-frequency components, or inter-satellite links perform under real conditions.

Communication security added another layer of urgency. Germany's Bundeswehr required verified, secure Ku- and Ka-band capabilities before integrating them into active military infrastructure. Relying on third-party satellites meant compromising control over sensitive testing outcomes.

The Heinrich Hertz mission gave Germany direct oversight of roughly 20 experiments across civil and military objectives. It wasn't just about innovation—it was about ensuring that future communications systems met Germany's strategic standards before large-scale operational commitment.

How OHB System AG Built the Heinrich Hertz Satellite

OHB System AG took on the task of designing and manufacturing the Heinrich Hertz satellite at its facility in Bremen, Germany. The team worked through significant engineering challenges to develop a spacecraft weighing roughly 3.5 tons, built to operate in geostationary orbit at approximately 36,000 km above Earth. The satellite design had to accommodate around 20 experiments covering advanced antennas, high-frequency components, inter-satellite links, and both Ku- and Ka-band military communications payloads for the Bundeswehr. You can see how that breadth of testing requirements made the build far more complex than a standard commercial relay satellite. OHB signed the manufacturing contract with DLR on June 28, 2017, and locked in the Arianespace launch contract on December 14, 2017, targeting a launch from Kourou, French Guiana.

20 Experiments the Heinrich Hertz Satellite Carried Into Orbit

When Heinrich Hertz reached geostationary orbit, it carried roughly 20 experiments spanning communications technology, antenna systems, high-frequency components, and inter-satellite links. These tests weren't academic exercises—they directly informed Germany's future secure communications infrastructure by validating technologies before deploying them operationally.

You can think of the satellite as a flying laboratory. Engineers tested advanced antennas alongside Ku- and Ka-band military communications payloads serving the Bundeswehr. Each experiment targeted a specific gap between current capability and what Germany's secure communications networks would eventually require.

Rather than launching a routine relay satellite, Germany used Heinrich Hertz to compress years of ground-based research into real orbital conditions. The data gathered would shape procurement decisions, reduce technical risk, and strengthen Germany's broader position in satellite communications technology.

Military and Civil Goals Behind the Heinrich Hertz Mission

Those 20 experiments didn't exist in a vacuum—they served two distinct masters. The Heinrich Hertz mission blended civil military integration into a single spacecraft, letting Germany test secure communications technology for both federal agencies and the Bundeswehr simultaneously.

Here's what that dual mandate actually covered:

Testing advanced antennas for future civil telecommunications networks
Validating Ku- and Ka-band payloads for military use
Demonstrating inter-satellite links for secure communications infrastructure
Supporting German federal ministries with operational technology insights
Strengthening Germany's independent satellite communications capability

You're looking at a program that didn't separate civilian curiosity from defense necessity—it fused them. DLR and OHB designed Heinrich Hertz to answer pressing questions for both sectors before committing to full operational systems. That efficiency defined the mission's strategic value.

The Heinrich Hertz Mission Contract and Launch Timeline

The Heinrich Hertz mission's contractual foundation rested on 2 key agreements signed in 2017. On June 28, DLR and OHB System AG finalized the contract signing that authorized the satellite's manufacture, testing, and launch. Just months later, on December 14, OHB locked in Arianespace as the official launch provider, securing an Ariane 5 rocket for the mission.

These agreements set a development timeline that stretched several years, with the initial target pointing toward Q4 2021. As Ariane 5 transitioned toward Ariane 6, reports shifted the expected launch window to late 2021 or early 2022. You can see how the mission reflected a deliberate, multi-year path — from contract award through spacecraft development — ensuring Germany's first dedicated communications technology satellite reached geostationary orbit properly equipped and thoroughly tested.

Heinrich Hertz Launch Delays and Final Deployment Outcome

Despite early ambitions of a Q4 2021 liftoff, Heinrich Hertz didn't make it off the ground on schedule. Delays pushed the timeline into late 2021 or early 2022, reflecting the complexities of validating new launch technologies and confirming precise satellite positioning in GEO.

Here's what shaped the delay:

Ariane 5 to Ariane 6 transition created scheduling uncertainty
Technology validation requirements extended pre-launch timelines
Satellite positioning parameters required additional verification
Integration of 20+ experimental payloads added complexity
Civil and military coordination slowed final approvals

You can see how each factor compounded the others. The mission wasn't a routine deployment — it was Germany's dedicated communications technology testbed, and that ambition demanded extra rigor before the satellite ever left Kourou.