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docs: create individual ST-01/ST-02 pages, fix XH-02/XH-03 English versions

Browse Source 
New pages:
- ST-01 万星源号/Stellaria zh+en: dual-origin story (base mothership→pause→reconfigure)
  7 mission subsections: Inner Solar System, Mars One 2, Europa Outpost 1,
  Major Overhaul (2nd gravity ring), Saturn 1, Star Port upgrade, Neptune
- ST-02 克里斯滕/Kristen zh+en: extended reconfiguration (884 days)
  Mars Expedition 1, Europa Outpost 2, Europa Expedition 2 (ongoing)

Fixed:
- XH-02 en: align with zh version (dates, missions, status)
- XH-03 en: align with zh version (dates, trial run status)

All pages: hyperlinks on first mention, database-sourced dates,
natural Chinese terminology, specific VLT numbers and orbiter names

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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2026-05-29 18:16:04 +08:00
co-authored by Claude Opus 4.7
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<article class="mw-parser-output wiki-article">
<h1 id="changxi-xh-03">Changxi (XH-03)</h1>
<table class="infobox">
<caption>Changxi (XH-03)<span>XH-03</span></caption>
<tbody>
<tr><td><div class="image-placeholder">XH-03 Changxi side-view image placeholder</div><div class="thumbcaption">XH-03 Changxi is the third Xihe-class ship and the first purpose-modified for deep-space communications relay missions.</div></td></tr>
<tr><td><b>Name</b>: Changxi (XH-03)</td></tr>
<tr><td><div class="image-placeholder">XH-03 Changxi side-view image placeholder</div><div class="thumbcaption">XH-03 Changxi is the third Xihe-class ship, currently in its commissioning phase.</div></td></tr>
<tr><td><b>Ship name</b>: Changxi (XH-03)</td></tr>
<tr><td><b>Designation</b>: XH-03</td></tr>
<tr><td><b>Class</b>: <a href="/home/Exploration_Motherships/Xihe">Xihe-class interplanetary exploration mothership</a></td></tr>
<tr><td><b>Construction started</b>: February 2056</td></tr>
<tr><td><b>Assembly completed</b>: December 2059</td></tr>
<tr><td><b>Shakedown</b>: January 2060 to April 2060 (planned)</td></tr>
<tr><td><b>Commissioned</b>: June 2060 (planned)</td></tr>
<tr><td><b>Current status</b>: In shakedown</td></tr>
<tr><td><b>Construction method</b>: Qingtian cargo ships + Star Port Station assembly</td></tr>
<tr><td><b>Namesake</b>: Changxi (moon charioteer goddess in Chinese mythology), symbolizing the transition from cislunar space to deep space</td></tr>
<tr><td><b>Construction start</b>: 2058-02-15</td></tr>
<tr><td><b>Assembly complete</b>: 2059-12-09</td></tr>
<tr><td><b>Commissioning</b>: 2060-01-14 to 2060-06-09 (ongoing)</td></tr>
<tr><td><b>Current status</b>: In commissioning (March 2060)</td></tr>
<tr><td><b>Construction method</b>: LEO assembly</td></tr>
</tbody></table>
<p><b>Changxi</b> (designation XH-03) is the third ship of the <a href="/home/Exploration_Motherships/Xihe">Xihe-class interplanetary exploration mothership</a> and the first Xihe-class vessel purpose-modified for deep-space communications relay missions. Named after Changxi, the moon charioteer goddess in Chinese mythology, the name reflects the ship's role bridging cislunar space and deep-space operations. Construction began in February 2056 and assembly was completed in December 2059, making Changxi the longest-build Xihe-class ship at approximately 46 months. As of March 2060, Changxi is in its shakedown phase and is expected to be formally commissioned in June 2060.</p>
<p>Changxi follows the nine-module axial spine configuration of the Xihe class, integrating the Perseverance mass-driver propulsion system, an Ark cold-fusion reactor, closed-loop life support, an artificial-gravity habitation ring, and reinforced docking hardware. Compared with its sister ships, Changxi's most distinctive feature is an enhanced deep-space communications suite integrated during construction, making it the first Xihe-class platform purpose-built for Jupiter relay network deployment and deep-space communications infrastructure support.</p>
<p>Changxi's construction overlapped with operations of XH-01 Xihe and XH-02 Taibai, and the resource allocation required for three concurrent ships significantly extended its build time. However, this extended period also allowed the construction team to fully incorporate operational feedback from the first two ships into Changxi's design, achieving the highest level of systems integration in the Xihe class, particularly in communications, life support, and data management. The ship is not capable of atmospheric re-entry or planetary landing; surface access is provided by carried Echo shuttles.</p>
<p><b>Changxi</b> (designation <b>XH-03</b>) is the third ship of the <a href="/home/Exploration_Motherships/Xihe">Xihe-class interplanetary exploration mothership</a>. Changxi began construction on 2058-02-15, completed assembly on 2059-12-09, and entered the commissioning phase on 2060-01-14. As of March 2060, Changxi is undergoing commissioning tests and is expected to complete on 2060-06-09, after which it will transition to pre-service maintenance. Changxi has no deep-space mission record yet.</p>
<nav class="toc" aria-label="Contents">
<div class="toc-title">Contents</div>
<ol>
<li><a href="#design-overview">Design overview</a></li>
<li><a href="#construction">Construction</a></li>
<li><a href="#commissioning">Commissioning</a></li>
<li><a href="#operational-history">Operational history</a></li>
<li><a href="#mission-outlook">Mission outlook</a></li>
<li><a href="#specifications">Specifications</a></li>
<li><a href="#fleet-role">Fleet role</a></li>
<li><a href="#see-also">See also</a></li>
</ol>
</nav>
<h2 id="design-overview">Design overview</h2>
<p>Changxi is the third Xihe-class ship, using an axial-spine multi-module cylindrical layout with an overall length of 83.4 m, a maximum diameter of 25 m at the artificial-gravity habitation ring, a full-load delta-v of about 1,700 km/s, and a maximum payload of 300 t. Functional zones are arranged along the central axis: forward docking hub, command center, artificial-gravity habitation ring, static habitation module, central docking hub, greenhouse module, main storage module, truss section, and propulsion module.</p>
<p>Changxi's most prominent design feature is its enhanced deep-space communications suite, integrated during construction rather than added as a post-build modification. The suite includes a high-gain deep-space communications antenna array, multi-band relay transceivers, laser communications terminals, and dedicated data processing units, providing stable communications relay capability at Jupiter distances and beyond. Unlike standard Xihe-class ships that would require mission-specific communications equipment to be added later, Changxi's suite was pre-installed in the truss section and central docking hub, fully integrated with the ship's power, thermal control, and data buses.</p>
<p>Beyond the communications enhancement, Changxi comprehensively benefits from XH-01 and XH-02 operational experience: the habitation module uses the same improved configuration as Taibai, radiation shielding is further thickened in critical areas, and the water-recycling system achieves a closed-loop recovery rate above 97%. These improvements give Changxi greater autonomy and survivability for Jupiter-system high-radiation environments and long-duration communications relay missions.</p>
<h2 id="construction">Construction</h2>
<h3>Background and challenges</h3>
<p>Changxi began construction at Star Port Station in February 2056, the second Xihe-class ship assembled at the station (after Taibai). The construction period coincided with the peak of XH-01's Mars expeditions and Jovian-system missions, as well as XH-02's Vesta mission and Mars expeditions. Running three ships concurrently placed significant strain on personnel, materiel, and Star Port Station's shipyard resources.</p>
<p>This resource dispersion is directly reflected in the build time: from February 2056 to December 2059, approximately 46 months—the longest Xihe-class construction to date. However, the extended construction period was not without value—it gave the build team ample time to incorporate the latest operational data from XH-01 and XH-02 into Changxi's design. Integrating the communications suite during construction rather than as a retrofit avoided the structural interference and system conflicts that a post-build modification might have caused.</p>
<p>Changxi's construction relied on Qingtian cargo ships for large-module transport and Star Port Station for assembly platform and integration environment. The Jupiter relay communications equipment—including the high-gain antenna array, relay transceivers, and laser communications terminals—was integrated during the truss-section assembly phase, with waveguides, power feeds, and data links pre-routed along the ship's axis, forming an organic whole with the ship's systems.</p>
<p>Changxi's construction began on 2058-02-15 using low Earth orbit assembly, with a construction period of approximately 22 months. Construction proceeded in parallel with <a href="/home/Exploration_Motherships/Xihe/XH-02">Taibai (XH-02)</a>'s operational missions and the Stellaria-class construction program. Like Taibai, Changxi was assembled at <a href="/home/Stations/Star_Port_Station">Star Port Station</a> using <a href="/home/Cargo_Ships/Qingtian">Qingtian cargo ships</a> for large-module transport. Changxi completed assembly on 2059-12-09, and formally began commissioning on 2060-01-14.</p>
<h3>Construction timeline</h3>
<table>
<thead><tr><th>Phase</th><th>Period</th><th>Main activity</th></tr></thead>
<thead><tr><th>Phase</th><th>Start</th><th>End</th><th>Duration</th></tr></thead>
<tbody>
<tr><td>Construction start</td><td>February 2056</td><td>First structural module delivered to Star Port Station; construction initiated.</td></tr>
<tr><td>Foundation structure</td><td>February 2056 to June 2057</td><td>Spine structure, propulsion module, and truss section assembly; communications antenna array pre-integration.</td></tr>
<tr><td>Major assembly</td><td>June 2057 to June 2059</td><td>Habitation modules, docking hubs, greenhouse, storage modules integrated sequentially; communications equipment installation and calibration completed.</td></tr>
<tr><td>Full-ship integration</td><td>June 2059 to December 2059</td><td>Cross-module verification, full system inspection, end-to-end communications link testing.</td></tr>
<tr><td>Assembly complete</td><td>December 2059</td><td>Major assembly took approximately 46 months; entered shakedown phase.</td></tr>
<tr><td>Construction</td><td>2058-02-15</td><td>2059-12-09</td><td>~22 months</td></tr>
<tr><td>Assembly complete (standby)</td><td>2059-12-09</td><td>2060-01-14</td><td>36 days</td></tr>
<tr><td>Commissioning (ongoing)</td><td>2060-01-14</td><td>Expected 2060-06-09</td><td>~146 days</td></tr>
</tbody></table>
<h2 id="commissioning">Commissioning</h2>
<p>Changxi began its commissioning phase on 2060-01-14, planned to last approximately 146 days, covering comprehensive Earth orbit systems checks, cislunar space maneuver validation, and deep-space communications testing. As of 2060-03-12, commissioning is in progress. After expected completion on 2060-06-09, Changxi will transition to pre-service maintenance before formal entry into service.</p>
<h2 id="operational-history">Operational history</h2>
<h3>Shakedown (January 8, 2060 to April 12, 2060, planned)</h3>
<p>Changxi began its shakedown phase at Star Port Station on January 8, 2060, with a planned duration of approximately three months (to April 12, 2060). The shakedown is divided into three stages designed to comprehensively validate all ship systems and the real-world performance of the enhanced deep-space communications suite.</p>
<h4>Earth orbit and GEO tests (January to February 2060)</h4>
<p>The first shakedown stage focused on low Earth orbit and geostationary orbit maneuver tests. Changxi completed full-thrust-profile propulsion validation, artificial-gravity ring rotation tests, long-duration life-support system evaluation, and ship-wide thermal control response testing. During this stage, the deep-space communications suite completed end-to-end link calibration with Star Port Station and ground control centers, along with validation of multiple communications mode switching.</p>
<h4>Lunar orbit round trip (February to March 2060)</h4>
<p>The second stage targeted lunar orbit, validating Changxi's Earth-Moon transfer capability and long-range navigation performance. Changxi departed from low Earth orbit, completed Earth-Moon transfer, lunar orbit insertion, and return maneuvers. This stage also tested the communications antenna array's pointing accuracy and relay forwarding capability at Earth-Moon distances, accumulating baseline data for subsequent Jupiter-distance communications missions.</p>
<h4>Deep-space communications relay tests (March to April 2060)</h4>
<p>The third stage is a dedicated deep-space communications relay test, which began in March 2060. Test items include multi-band relay forwarding, laser communications terminal long-distance lock stability, communications link interference resistance, and autonomous protocol switching under simulated Jupiter-distance communications delays. This stage is the core validation element of Changxi's shakedown, directly determining the technical readiness for the subsequent Jupiter relay network deployment mission.</p>
<p>As of March 2060, Changxi's shakedown is progressing on schedule. All test objectives for the first two stages have been met, and the deep-space communications relay tests are in progress. After shakedown concludes, Changxi is expected to be formally commissioned in June 2060.</p>
<table>
<thead><tr><th>Shakedown stage</th><th>Period</th><th>Content</th><th>Status</th></tr></thead>
<tbody>
<tr><td>Earth orbit and GEO tests</td><td>2060-01 to 2060-02</td><td>Propulsion validation, life-support evaluation, communications link calibration.</td><td>Complete</td></tr>
<tr><td>Lunar orbit round trip</td><td>2060-02 to 2060-03</td><td>Earth-Moon transfer, lunar orbit insertion, antenna pointing accuracy verification.</td><td>Complete</td></tr>
<tr><td>Deep-space communications relay tests</td><td>2060-03 to 2060-04</td><td>Multi-band relay, laser lock stability, autonomous protocol switching verification.</td><td>In progress</td></tr>
</tbody></table>
<h2 id="mission-outlook">Mission outlook</h2>
<p>After commissioning, Changxi will undertake two primary mission directions: Jupiter relay communications network deployment and Europa Outpost support.</p>
<h3>Jupiter relay communications network deployment</h3>
<p>Changxi's core mission is deploying a relay communications satellite network in the Jovian system. This network will cover communications links between Jupiter's major moons (Europa, Io, Ganymede, and Callisto) and Earth, providing stable, lower-latency communications infrastructure for subsequent long-duration Jovian-system scientific expeditions, Europa Outpost operations, and crewed missions. Changxi's enhanced deep-space communications suite allows it to simultaneously serve as network coordination node and communications test platform during relay satellite deployment.</p>
<p>Network deployment is expected to proceed in phases: first, backbone node satellites will be placed in high Jupiter orbit; next, local relay stations will be positioned around the major moons; finally, network interconnection and end-to-end validation will be completed. Throughout the deployment process, Changxi will serve as a mobile command and control center, handling satellite release, orbital calibration, link establishment, and network integration.</p>
<h3>Europa Outpost support</h3>
<p>Changxi's second mission direction is providing communications and logistics support for Europa Research Outpost. As the first Xihe-class ship purpose-optimized for deep-space communications relay, Changxi can provide high-bandwidth relay links between the outpost and Earth while using its mothership-class platform for cargo transfer, crew rotation, and emergency evacuation capability.</p>
<p>Changxi is the first Xihe-class ship designated from the design phase with deep-space communications infrastructure as its primary mission direction. This role complements XH-01 (emphasizing technology validation and outer Solar System expeditions) and XH-02 (emphasizing inner Solar System and Mars-system missions), reflecting the Xihe-class fleet's diversified development in mission specialization.</p>
<p>Changxi has no deep-space mission record yet.</p>
<h2 id="specifications">Specifications</h2>
<table>
<thead><tr><th>Parameter</th><th>Value</th></tr></thead>
<tbody>
<tr><td>Type</td><td>Crewed interplanetary exploration mothership (Xihe class)</td></tr>
<tr><td>Configuration</td><td>Axial-spine multi-module cylindrical layout</td></tr>
<tr><td>Length</td><td>83.4 m</td></tr>
<tr><td>Maximum diameter</td><td>25 m at the artificial-gravity habitation ring</td></tr>
<tr><td>Class</td><td>Xihe-class interplanetary exploration mothership</td></tr>
<tr><td>Construction period</td><td>Approximately 22 months</td></tr>
<tr><td>Propulsion</td><td>Perseverance mass-driver propulsion system</td></tr>
<tr><td>Main reactor</td><td>Ark cold-fusion reactor, about 8 TW output class</td></tr>
<tr><td>Thrust</td><td>2,400 kN standard mode; 3,800 kN high-thrust mode</td></tr>
<tr><td>Specific impulse</td><td>500,000 s standard mode; 250,000 s high-thrust mode</td></tr>
<tr><td>Full-load delta-v</td><td>About 1,700 km/s with 300 t payload</td></tr>
<tr><td>Maximum payload</td><td>300 t including surface vehicles and supplies</td></tr>
<tr><td>Long-duration crew</td><td>15</td></tr>
<tr><td>Short-duration crew</td><td>30</td></tr>
<tr><td>Artificial gravity</td><td>About 0.41 g from the rotating habitation ring</td></tr>
<tr><td>Carried vehicles</td><td>Typically two Echo shuttles, or an Echo plus Amalthea-type compatible vehicle mix</td></tr>
<tr><td>Communications system</td><td>Enhanced deep-space communications suite (high-gain antenna array, multi-band relay transceivers, laser communications terminals, dedicated data processing units)</td></tr>
<tr><td>Construction method</td><td>Qingtian cargo ships + Star Port Station assembly</td></tr>
<tr><td>Build duration</td><td>Approximately 46 months (Feb 2056 to Dec 2059)</td></tr>
<tr><td>Carried vehicles</td><td>Two Echo shuttles</td></tr>
<tr><td>Home port</td><td>Star Port Station</td></tr>
</tbody></table>
<h2 id="fleet-role">Fleet role</h2>
<p>Within the Xihe-class fleet, Changxi is positioned as the dedicated platform for deep-space communications infrastructure and Jupiter-system relay network deployment. Unlike the lead ship Xihe (multi-role comprehensive validation and outer Solar System expeditions) and the second ship Taibai (inner Solar System and Mars-system workhorse), Changxi's mission direction centers on communications relay, representing the Xihe class's evolution from general-purpose motherships toward mission-specialized platforms.</p>
<p>Changxi's enhanced deep-space communications suite gives it unique mission advantages among the three Xihe-class ships: in distant mission scenarios such as the Jovian system, Changxi can not only perform mothership-class transport and support missions but also simultaneously serve as a mobile relay communications node, substantially enhancing communications capability and network redundancy in the mission area. This role is critically important for subsequent large-scale Jovian-system scientific expeditions and Europa Outpost expansion.</p>
<p>As of March 2060, the Xihe-class fleet has three active ships (XH-01 Xihe is in the Jovian system on Europa Expedition 3; XH-02 Taibai is in post-mission maintenance; XH-03 Changxi is in shakedown) and one under construction (XH-04). Changxi will soon become the fourth Xihe-class mothership to enter operations, and its communications relay specialization will significantly enhance humanity's sustained presence capability in the Jovian system.</p>
<h2 id="see-also">See also</h2>
<ul>
<li><a href="/home/Exploration_Motherships/Xihe">Xihe-class interplanetary exploration mothership</a></li>
<li><a href="/home/Exploration_Motherships/Xihe/XH-01">Xihe (XH-01)</a></li>
<li><a href="/home/Exploration_Motherships/Xihe/XH-02">Taibai (XH-02)</a></li>
<li><a href="/home/Exploration_Motherships/Stellaria">Stellaria-class interplanetary exploration mothership</a></li>
<li><a href="/home/Space_Shuttles/Echo_Shuttle">Echo Shuttle</a></li>
<li><a href="/home/Stations/Star_Port_Station">Star Port Station</a></li>
<li><a href="/home/Cargo_Ships/Qingtian">Qingtian cargo vehicle</a></li>
<li><a href="/home/Bases/Europa_Research_Outpost">Europa Research Outpost</a></li>
<li>Jupiter relay communications network</li>
<li><a href="/home/Cargo_Ships/Qingtian">Qingtian cargo ship</a></li>
</ul>
</article>
</article>