> For the complete documentation index, see [llms.txt](https://docs.radiantdrift.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.radiantdrift.com/getting-started/validity-accuracy-and-precision.md). # Validity, Accuracy, and Precision Under construction 🚧 We plan to add information regarding validity of end points, particularly with respect to date ranges, and also expected accuracy. Generally, calculated astronomical values are presented to 8 decimal places, which may exceed the expected accuracy in some cases. Calculated coordinates (e.g. latitude, longitudes in eclipse paths) are normally given to 6 decimal places. It's been our experience that having precision match or exceed expected accuracy is often advantageous - not in a scientific context but in that of day-to-day software development, where comparability of results is usually most helpful and the ability to detect changes in outputs can often signify an unintended or unexpected change in inputs, assumptions, algorithms or behaviors, even if the digits that changed are not in themselves practically significant. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.radiantdrift.com/getting-started/validity-accuracy-and-precision.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.