--- title: High-orbit satellites could light the way for travel to... description: MIT Lincoln Laboratory is developing LightHOUSE (Light High-Orbit Utility Signal Emitter), a concept for a small constellation of satellites in ultrahigh... canonical: https://daily.dev/posts/high-orbit-satellites-could-light-the-way-for-travel-to-the-moon-vjfcf0rug twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: High-orbit satellites could light the way for travel to the moon | daily.dev og:description: MIT Lincoln Laboratory is developing LightHOUSE (Light High-Orbit Utility Signal Emitter), a concept for a small constellation of satellites in ultrahigh... og:url: https://daily.dev/posts/high-orbit-satellites-could-light-the-way-for-travel-to-the-moon-vjfcf0rug og:image: https://api.daily.dev/og/posts/vjfcF0rug.png og:image:alt: High-orbit satellites could light the way for travel to the moon og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # High-orbit satellites could light the way for travel to the moon **[MIT News](https://daily.dev/sources/mit)** · 5 min read · 0 upvotes · 0 comments ## Summary MIT Lincoln Laboratory is developing LightHOUSE (Light High-Orbit Utility Signal Emitter), a concept for a small constellation of satellites in ultrahigh orbits up to ~1 million miles altitude that would serve as cooperative optical beacons for spacecraft navigating cislunar space. Unlike the Deep Space Network, which is Earth-based and limited in angular baseline, LightHOUSE would use free-space optical (laser) communications to provide timely, independent 3D position and velocity data to user spacecraft. The system is designed asymmetrically — beacons carry the heavy hardware burden (tens-of-centimeter telescopes, tens-of-watts lasers) while user spacecraft need only small apertures and milliwatt-class lasers. It builds on prior NASA-sponsored laser comms work including TBIRD and the Artemis II O2O demonstration. A full-scale deployment would cost hundreds of millions of dollars, compared to GPS's $1.8B annual operating budget and ~$85–100M per DSN dish. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What is the LightHOUSE concept from MIT Lincoln Laboratory? LightHOUSE (Light High-Orbit Utility Signal Emitter) is a proposed constellation of satellites in ultrahigh orbits — up to roughly 1 million miles altitude — that act as cooperative optical beacons for spacecraft in cislunar space. Using free-space laser communications and stellar imaging, the beacons estimate user spacecraft 3D position and velocity, reducing reliance on the Deep Space Network and onboard navigation sensors. _Engineers working on cislunar mission design track developments like LightHOUSE on daily.dev as the field moves fast._ ### Why is navigation in cislunar space harder than in Earth orbit? GPS does not extend beyond geosynchronous Earth orbit, and the Deep Space Network — the primary alternative — has all its antennas on Earth, giving it a small angular baseline relative to cislunar distances. This limits orbit determination accuracy, makes precise position estimates take hours, restricts simultaneous mission support to a few at a time, and requires spacecraft to actively emit signals rather than passively receive them. _Spacecraft navigation teams following the push toward the moon keep up with infrastructure gaps like these on daily.dev._ ## Similar posts on daily.dev - [NASA’s Artemis II Moon mission shows space-to-Earth laser comms can scale](https://daily.dev/posts/nasa-s-artemis-ii-moon-mission-shows-space-to-earth-laser-comms-can-scale-eqqybz0bd) · TechCrunch · 0 upvotes · 0 comments - [Lincoln Laboratory and Haystack Observatory team up to unveil hidden parts of the galaxy](https://daily.dev/posts/lincoln-laboratory-and-haystack-observatory-team-up-to-unveil-hidden-parts-of-the-galaxy-dzsibpqzf) · MIT News · 0 upvotes · 0 comments - [Laser Satellite Communication Promises Fiber Speeds](https://daily.dev/posts/laser-satellite-communication-promises-fiber-speeds-qepqrcaxk) · IEEE Spectrum · 0 upvotes · 0 comments - 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Using free-space laser communications and stellar imaging, the beacons estimate user spacecraft 3D position and velocity, reducing reliance on the Deep Space Network and onboard navigation sensors. Engineers working on cislunar mission design track developments like LightHOUSE on daily.dev as the field moves fast."}},{"@type":"Question","name":"Why is navigation in cislunar space harder than in Earth orbit?","acceptedAnswer":{"@type":"Answer","text":"GPS does not extend beyond geosynchronous Earth orbit, and the Deep Space Network — the primary alternative — has all its antennas on Earth, giving it a small angular baseline relative to cislunar distances. This limits orbit determination accuracy, makes precise position estimates take hours, restricts simultaneous mission support to a few at a time, and requires spacecraft to actively emit signals rather than passively receive them. Spacecraft navigation teams following the push toward the moon keep up with infrastructure gaps like these on daily.dev."}}]} ```