Match Navara satellite landscapes to the Re:Earth Fuji view

DATA_SOURCES.md

@@ -33,6 +33,7 @@ How to read this:
 | **AISStream.io**                                                      | Live vessels (AIS)                                                                                                                  | Free, beta, no formal ToS; AIS is a public broadcast                                                                                                                                                                                                                                                                                                  | "AISStream.io" (courtesy)                                                                                                                   |
 | **CelesTrak**                                                         | Satellite TLEs (SGP4)                                                                                                               | US-government-origin data, no license; citation requested                                                                                                                                                                                                                                                                                             | "CelesTrak (celestrak.org), Dr. T.S. Kelso"                                                                                                 |
 | **The Space Devs — Launch Library 2 v2.3**                            | Recent launch, payload, stage, and recovery metadata for Space Missions (30d)                                                       | [The Space Devs terms of use](https://github.com/TheSpaceDevs/Tutorials/blob/main/faqs/faq_TSD.md#terms-of-use): data may be used and shared in any form; avoid forwarding it without added value; attribution is encouraged (not mandatory). [Official API limits](https://ll.thespacedevs.com/docs/): 15 unauthenticated calls/hour; optional token | "Launch Library 2 — The Space Devs" (courtesy attribution)                                                                                  |
+| **EOX Sentinel-2 cloudless 2020**                                     | Optional satellite basemap in Cesium and Navara. Navara uses daylight for terrain inspection.                                       | [EOX Maps](https://maps.eox.at/) and [imagery licence](https://cloudless.eox.at/)                                                                                                                                                                                                                                                                     | Sentinel-2 cloudless 2020 by EOX IT Services GmbH (contains modified Copernicus Sentinel data 2020)                                         |
 | **Esri World Imagery** (ArcGIS Online tile service)                   | The keyless satellite basemap — the default landing when no Google/ion credential is configured, and the "Esri Satellite" map stack | [Esri Master Agreement](https://www.esri.com/en-us/legal/terms/full-master-agreement): the public World Imagery service is usable in public-facing apps with attribution; no key is required for this classic endpoint, but Esri governs and can change access — an app at scale should review current ArcGIS Location Platform terms                 | "Powered by Esri — Source: Esri, Maxar, Earthstar Geographics, and the GIS User Community" (provider carries the service's own credit line) |
 | **USGS**                                                              | Earthquakes                                                                                                                         | U.S. public domain                                                                                                                                                                                                                                                                                                                                    | "Data courtesy of the U.S. Geological Survey"                                                                                               |
 | **Environment and Climate Change Canada** (MSC GeoMet OGC API) | Air quality (AQHI) — Canadian station observations | [ECCC Data Servers End-use Licence](https://eccc-msc.github.io/open-data/licence/readme_en/) (open, attribution required, no endorsement implied) | "Contains information licensed under the Environment and Climate Change Canada Data Servers End-use Licence" |