{"id":51701,"date":"2026-03-30T14:43:07","date_gmt":"2026-03-30T14:43:07","guid":{"rendered":"https:\/\/www.europesays.com\/dk\/51701\/"},"modified":"2026-03-30T14:43:07","modified_gmt":"2026-03-30T14:43:07","slug":"inside-europes-first-laser-satellite-link-in-greenland","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/dk\/51701\/","title":{"rendered":"Inside Europe’s first laser satellite link in Greenland"},"content":{"rendered":"

Communication systems rely on either radio waves or laser beams to transmit data. As satellite constellations multiply and Earth-observation payloads become more data-hungry, the balance between the two is shifting. Laser communication systems can achieve data transfer rates of up to 10 gigabits per second<\/a> \u2014 roughly five to ten times faster than traditional radio frequency (RF) systems.<\/p>\n

Now, the European Space Agency (ESA) is contracting Lithuanian space\u2011tech startup Astrolight to build the first optical ground station (OGS) in Greenland. The project is part of a broader goal to strengthen Europe\u2019s polar satellite data links, following suspected GPS spoofing incidents<\/a> near Svalbard in 2025 that exposed the vulnerability of RF\u2011dependent infrastructure in Arctic regions.<\/p>\n

Unlike radio signals, which spread over wide areas and can be jammed or intercepted with relatively simple equipment, laser\u2011based links transmit data through a tightly focused beam \u2014 one that is inherently difficult to detect or disrupt.<\/p>\n

Astrolight designs and builds free\u2011space optical communication systems<\/a> for satellites and ground stations, including the terminals and adaptive optics hardware needed to maintain stable laser links through atmospheric turbulence.\u00a0\u00a0<\/p>\n

Interesting Engineering (IE) spoke with Laurynas Ma\u010diulis, CEO of Astrolight, to understand the engineering challenges behind building an optical ground station at one of the most demanding locations on Earth.<\/p>\n

What those challenges reveal is as much about the physics of light as it is about surviving the Arctic.<\/p>\n

Why Greenland?<\/p>\n

Europe\u2019s primary polar satellite infrastructure<\/a> centers on Svalbard, Norway, where the RF\u2011based Svalbard Satellite Station tracks all 14 daily passes<\/a> of polar\u2011orbiting satellites.\u00a0<\/p>\n

\"CopernicusThe Svalbard satellite station as of 2023. Credit: European Union, Copernicus Sentinel-2 imagery<\/a>.<\/p>\n

Greenland\u2019s interior town of Kangerlussuaq, also under polar\u2011orbit tracks, gives similarly frequent, high\u2011elevation passes ideal for short\u2011window laser downlinks. Situated further west, it also diversifies polar coverage geographically, and its Arctic-desert interior offers relatively clear skies for much of the year, increasing the number of usable optical downlink windows.<\/p>\n

But RF downlinks are bandwidth\u2011limited. Satellite operators relay less than 30%<\/a> of the data from modern remote-sensing instruments, a gap projected to widen as the number of Earth-observation satellites rises by 190%<\/a> over the next decade.<\/p>\n

Astrolight\u2019s OGS in Greenland addresses this directly. Operating as a space-to-ground laser receiver, the station will downlink data from satellites during each overhead pass.\u00a0<\/p>\n

The company draws on experience building systems for nanosatellites, where thermal deformation and pointing stability constraints closely mirror those of ground-based optical hardware<\/a>.<\/p>\n

On who the station serves, Ma\u010diulis told IE, \u201cThe OGS will support customers in telecommunications and Earth Observation, including space agencies, governments, and commercial satellite operators. It will provide faster, more reliable downlinking of terabytes of data, particularly for optical, hyperspectral, radar, and infrared imaging.\u201d\u00a0\u00a0<\/p>\n

How the laser link works<\/p>\n

At its core, an OGS is a precision telescope system housed inside a protective dome. When a satellite passes overhead, the dome opens, and the telescope locks onto the spacecraft, acquiring the signal, tracking its movement across the sky, and maintaining a stable laser link for the duration of the pass.\u00a0<\/p>\n

On the satellite side, a compact optical terminal transmits the data downlink as a focused laser beam, typically at a wavelength around 1550 nanometers<\/a>. That wavelength occupies an optical channel \u2014 similar to a radio station frequency, but operating at roughly 200 terahertz rather than megahertz. The data is encoded onto the light using modulation techniques \u2014 the same spirit as AM, FM, or phase modulation.<\/p>\n

The ground station receives that beam with its telescope, focuses it onto a detector, and converts the optical signal back into digital data. Because the laser beam is extremely narrow, multiple laser links<\/a> can reuse the same wavelength without interference, as long as their beams do not cross paths.\u00a0<\/p>\n

The lasercom link itself is a free-space channel \u2014 light travelling through air. From the ground station onward, the data pipeline typically runs over conventional fiber-optic backhaul.<\/p>\n

The precise nature of the laser beam also makes it difficult to jam. This is in contrast to RF signals, which radiate outward in all directions.\u00a0<\/p>\n

\u201cA lasercom link is inherently more resilient to jamming because it is highly directional,\u201d said Ma\u010diulis. \u201cTo intercept a laser link, an adversary would need to physically interfere with the narrow beam path, which is difficult because the beam is invisible. Even if an adversary manages to get close enough to locate the laser link, it would then be operationally challenging and would likely be noticed fast.\u201d<\/p>\n

Engineering the Arctic<\/p>\n

The Arctic presents an environment that works against the OGS at every layer.<\/p>\n

Atmospheric turbulence<\/p>\n

In the Arctic, temperature gradients and thermal convection are the dominant drivers of atmospheric turbulence. These distort the wavefront of the incoming beam and degrade signal quality.<\/p>\n

\"GeodesicThe Arctic environment presents additional challenges to the laser link. Credit: Bernt Rostad\/Flickr<\/a>.<\/p>\n

As Ma\u010diulis explained, \u201cThere are different techniques, but the classical approach is to measure how the wavefront is distorted by atmospheric turbulence.\u201d Once measured, the system acts fast. \u201cA sensor detects those distortions, and a specialised device known as a deformable mirror is adjusted to compensate for them \u2014 the system continuously corrects the beam, reshaping it to a more uniform distribution,\u201d he continued.<\/p>\n

Thermal deformation<\/p>\n

But turbulence is only one layer of the problem. Once the dome opens, the telescope and its supporting mechanical structures<\/a> are exposed to extreme cold and sharp thermal gradients.<\/p>\n

\u201cThese shifts can cause the telescope and supporting mechanical structures to deform, which affects the pointing accuracy that laser communication depends on,\u201d explained Ma\u010diulis. \u201cThe system has to be designed so those shifts can be measured and compensated for, allowing the laser to remain accurately referenced and precisely pointed at the satellite.\u201d<\/p>\n

The thermal swings are not unlike those Astrolight\u2019s hardware already contends with in space. According to Ma\u010diulis, the company\u2019s systems routinely cycle between about -30 and +60 degrees Celsius orbit to orbit, a design experience that directly informed their approach to the ground station.<\/p>\n

Polar day calibration<\/p>\n

The Arctic also strips away a tool that optical ground stations elsewhere take for granted: stars. At lower latitudes, star-tracking is the standard method for calibrating a telescope\u2019s pointing reference. During polar day in Greenland, when the sun never sets, that option disappears entirely.<\/p>\n

\u201cYou cannot rely on stars to calibrate the system,\u201d Ma\u010diulis noted. \u201cThat means more advanced methods are needed to maintain precise altitude knowledge and calibration; otherwise, the link cannot be established.\u201d<\/p>\n

Together, these constraints define the core engineering problem. Once solved, the data flowing through the station spans optical, hyperspectral, radar, and infrared imaging. For civilian and governmental users alike, that translates to environmental monitoring, disaster response, and Arctic situational awareness.<\/p>\n

Beyond Svalbard<\/p>\n

The Greenland station is not an endpoint.<\/p>\n

\u201cThe ambition is not to stop at one location, but to build out a network of OGSs that can provide high-throughput communications to Europe\u2019s satellite networks, such as IRIS\u00b2, as well as other constellations,\u201d said Ma\u010diulis. \u201cIt has the potential to contribute to ESA\u2019s HydRON project.\u201d<\/p>\n

Both programmes represent significant bets on optical infrastructure. IRIS\u00b2 is the EU\u2019s flagship secure connectivity constellation, with first launch envisioned in 2029<\/a>, while HydRON aims to demonstrate the world\u2019s first all-optical multi-orbit<\/a> transport network.<\/p>\n

Greenland\u2019s value as a starting point is partly strategic and partly practical. If the system performs reliably in one of the most demanding operating environments on Earth, it demonstrates the ruggedness needed for deployment elsewhere. \u201cGreenland is a particularly important starting point because it is one of the more extreme operating environments,\u201d noted Ma\u010diulis.<\/p>\n

Europe is not alone in this push. NASA operates optical ground stations in Hawaii and California as part of its Laser Communications Relay Demonstration<\/a> project. China, meanwhile, completed its first commercially operational satellite-to-ground laser station on the Pamir Plateau in 2024 and has since rapidly scaled throughput \u2014 hitting 120 Gbps<\/a> by early 2026.<\/p>\n

The broader implication is resilience. A distributed optical ground network is harder to disrupt than a single RF-dependent node \u2014 not just because laser links are difficult to jam, but because the architecture itself distributes the risk.<\/p>\n

\"MynaricThe Mynaric CONDOR Mk3.1, a production satellite laser communication terminal mounted on satellite to transmit laser beams to ground stations like Greenland\u2019s OGS. Credit: Blervis\/Wikimedia Commons<\/a>. <\/p>\n

According to Ma\u010diulis, the key lessons from Greenland will centre on designing systems adaptable to different climates and robust enough to operate across a wide range of conditions \u2014 knowledge that will directly inform the next generation of optical ground stations.<\/p>\n","protected":false},"excerpt":{"rendered":"Communication systems rely on either radio waves or laser beams to transmit data. As satellite constellations multiply and…\n","protected":false},"author":2,"featured_media":51702,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_share_on_mastodon":"0"},"categories":[5],"tags":[28601,28602,57,28603],"class_list":["post-51701","post","type-post","status-publish","format-standard","has-post-thumbnail","category-greenland","tag-communication-satellite","tag-defense-amp-military","tag-greenland","tag-satellite"],"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@dk\/116318661182918331","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/dk\/wp-json\/wp\/v2\/posts\/51701","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/dk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/dk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/dk\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/dk\/wp-json\/wp\/v2\/comments?post=51701"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/dk\/wp-json\/wp\/v2\/posts\/51701\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/dk\/wp-json\/wp\/v2\/media\/51702"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/dk\/wp-json\/wp\/v2\/media?parent=51701"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/dk\/wp-json\/wp\/v2\/categories?post=51701"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/dk\/wp-json\/wp\/v2\/tags?post=51701"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}