# sign-convention

drillable.com › vocab › sign-convention.
As of the index built 10 Sep 2026, 00:38 UTC · [cites, never asserts](/standing).
MCP https://mcp.drillable.com · [html](/vocab/sign-convention.html) · [markdown](/vocab/sign-convention.md) · [json](/vocab/sign-convention.json) · [discovery](/.well-known/drillable.json) · [guide](/llms.txt)

## Definitions

No reader has asserted a definition or an alias for it; its meaning is what its uses show.

## Where it is used (1 use on 1 subject in 1 work)

By drillable.com ([llm-extract/1](/standing#methods)).

- **observer longitude** = added if east of Greenwich, subtracted if west of Greenwich · [quote](/r/sha256:5fb2f96353c2ac943f32662a18c2e14eee59e94595ae8c0304230300c4b28af9?trace&start=3902&end=4040) · [sha256:505e43d9f1879858…](/r/sha256:505e43d9f18798583d8411c021b33241fbed216985244d137fca8c8eee60f5d4)


A property means what the records about it say, and nothing more.

---
[standing](/standing) · Drillable™ is a trademark of Drillable LLC.