Rsclub2_2andClaude Opus 5.5
92c2576a81
* Path analysis: own ground height ASL and highest point of the remote square Two new settings in the path-analysis section of the Station tab: - Own ground height ASL (stn_pathAnalysisOwnHeightAslMeters). Empty keeps the elevation model value at the own locator centre; a value from -500 to 9000 m replaces the elevation of the first profile sample. The antenna height AGL is still added on top. The field commits on Enter or focus loss into the settings draft and reports a refused entry; it keeps the operator's spelling while that names the drafted number, because the draft is Compose state and would otherwise swap "25" for "25.0" under the cursor right after Enter. - Target station on the highest point of its locator square (stn_pathAnalysisDxHighestPointInSquare, on by default). The remote square is sampled on a 5 x 5 grid of cell centres in one batched request against the Open-Meteo provider, the highest sample becomes the path end with its position and elevation. LocatorHighestPointResolver caches the result per locator for the session and backs off five minutes after a failure (failure list pruned and bounded); the analysis then falls back to the square centre and that result is not kept. Both settings are drafted like the other path-analysis settings and take effect with Apply/Close or Save; the reachability service reads the stored values only. The lookup runs on the reachability thread only. Building a request peeks the resolver cache without blocking, so a cached square moves the endpoint right away. The calculation key now includes the own height and the remote ground elevation at full precision, and the switch, so changing either recalculates. Also assign the result of sanitizeEffectiveEarthRadiusFactor in the PathAnalysisRequest constructor; it was called and dropped. No behaviour change: the sanitizer is the identity for valid factors, and the analysis service sanitizes again. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * Document own ground height and highest-point setting of the path analysis Changelog v1.50 (New), configuration and features pages in English and German, and the terrain section of PROJECT_CONTEXT. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
KST4Contest
KST4Contest is a Java-based client for the ON4KST chat, developed for coordinated VHF, UHF and microwave contest operation.
The application is developed by Marc Fröhlich (DO5AMF) and since 2026 Philipp Wagner (DN9APW).
Start here
- Project website
- Download Stable, Beta and Nightly builds
- Online manual
- GitHub wiki
- Issues and bug reports
- Development roadmap
What KST4Contest does
KST4Contest combines the ON4KST chat with information that is useful when coordinating contacts during a contest.
Among other things, it can:
- display and filter stations from the supported ON4KST chat categories;
- derive band and frequency information from chat messages and station names;
- maintain Worked and NOT QRV information for the available bands;
- calculate station priorities from distance, activity and other available information;
- manage internal skeds and received Win-Test skeds;
- use AirScout information when evaluating possible aircraft-scatter contacts;
- display stations, paths and additional propagation information on maps;
- exchange information with supported logging programs, Win-Test, PSTRotator and a local DX Cluster interface;
- provide configurable automatic replies for recurring chat requests.
Calculated scores, aircraft-scatter information and path assessments are operating aids. They depend on the available data and should not be treated as guarantees that a contact is possible.
Installation
Ready-to-use packages are available for Windows, Linux and macOS. These packages include the required Java runtime, so a separate Java installation is normally not necessary.
Use the central download page to select the appropriate build:
- Stable is intended for normal contest operation.
- Beta contains changes that are being prepared for a stable release.
- Nightly contains the latest automated development build and is mainly intended for testing.
Documentation
The documentation is available in German and English:
The Markdown sources used for the wiki and the generated PDF manuals are stored in github_docs.
Changes to operating behaviour should be documented together with their purpose and limitations. This is especially important for functions whose result depends on external data, heuristics or information derived from chat messages.
Building from source
Building KST4Contest requires JDK 21. The Gradle Wrapper included in the repository should be used, so a separate Gradle installation is not required.
Linux and macOS:
./gradlew clean build
Windows:
.\gradlew.bat clean build
Repository structure
core/– domain, controller and network code, free of user-interface technologyapp-desktop/– the Compose Multiplatform user interface and the packaging tasksgithub_docs/– German and English manual sourceswebsite/– project website sourcespackaging/– platform-specific packaging files
CI status
Documentation
Builds
License
KST4Contest is distributed under the GNU General Public License v3.0.
Supporters/Sponsor
This Project is possible due to donations of the community.
You can sponsor KST4Contest here: Support on Ko-Fi. If you add an Display Name there you will be mentioned here.
The following people are sponsoring KST4Contest:
- Marco (DJ5KW)