Dictionary term
Refraction Correction
Direct answer
Refraction Correction is the adjustment for Earth's atmosphere bending a celestial ray and raising the body's apparent altitude.
Refraction Correction is an atmospheric bending correction used in historical astronomy, timekeeping, or navigation.
Refraction Correction is an atmospheric bending correction used in historical astronomy, timekeeping, or navigation.
An engraved functional orientation; the page explains the real instrument, method, or publication.Quick reference
- Use when
- Use Refraction Correction by using the altitude range and atmospheric assumptions of the approved table or model.
- Do not use it for
- Near-horizon refraction is variable and can be anomalous, so a standard table cannot remove every local effect.
- Reference category
- Historical Almanacs & Instruments
- Related terms
- Altitude Correction, Dip Correction, Semidiameter Correction, Almanac
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The story behind Refraction Correction
Astronomers and navigators developed refraction tables as increasingly precise observations exposed systematic bending.
Refraction Correction in spiritual tradition
Refraction Correction rewards careful observation, explicit assumptions, and humility about the limits of every model or measurement.
Refraction Correction: fact and faith, kept distinct
This is a factual history-of-science, instrument, timekeeping, or navigation reference. It may support wonder and disciplined attention without becoming a claim of fate, worship, or private revelation.
Refraction Correction in numerology
Refraction Correction is not a numerology claim. Any numbers attached to it should retain their ordinary scientific, calendrical, navigational, or historical meaning unless a separate symbolic interpretation is clearly labeled.
Why Refraction Correction matters
Refraction Correction matters because refraction is strongest near the horizon and separates apparent direction from the vacuum geometric direction.
Refraction Correction at work: an example
A low star sight receives a larger refraction correction than a high-altitude sight.
Where interpretation stops
Refraction Correction is presented as sourced astronomy, calendrical, Earth-science, cultural, or instrument-history reference. Definitions should distinguish measured phenomena from civil convention and historical interpretation, preserve location and time dependencies, and avoid turning factual sky data into a deterministic personal claim.
Sources and editorial method
Research references used for this entry include:
- National Geospatial-Intelligence Agency: The American Practical Navigator - Official modern reference for navigation principles, celestial observations, sight reduction, and navigational tables.
- U.S. Naval Observatory: Astronomical and Navigational Almanacs - Official descriptions of the Astronomical Almanac, Nautical Almanac, and their tabular data.
- Source
- The Great Almanac Dictionary
- Category
- Historical Almanacs & Instruments
- Also appears in
- Historical Almanacs & Instruments
- Aliases
- None listed
- Last updated
- 2026-07-16
Explore Refraction Correction
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More in Historical Almanacs & Instruments
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Common questions
What is Refraction Correction?
Refraction Correction is the adjustment for Earth's atmosphere bending a celestial ray and raising the body's apparent altitude.
How is Refraction Correction used in an almanac?
Use Refraction Correction by using the altitude range and atmospheric assumptions of the approved table or model.
What should I avoid when interpreting Refraction Correction?
Near-horizon refraction is variable and can be anomalous, so a standard table cannot remove every local effect.
