About Sight reduction
Celestial navigation - Astronavigation Sight reduction: - Marcq Saint Hilaire Line of Position, intercept method (p=Ho-Hc, Zn) - Input for observed altitude Ho or instrumental Hs (Nautical Almanac data needed for the Sun...
Celestial navigation - Astronavigation
Sight reduction:
- Marcq Saint Hilaire Line of Position, intercept method (p=Ho-Hc, Zn)
- Input for observed altitude Ho or instrumental Hs (Nautical Almanac data needed for the Sun and the Moon)
- Calculator for Intercept method (p=Ho-Hc, Zn) altitude Hc and azimuth Zn
- Running fix
- Plots up to 3 Marcq Saint Hilaire Lines of Position on Google maps
- Local hour angle (LHA)
- List of navigational stars
- Logbook (output is copied to clipboard)
- New optimized user interface
- GNSS fix to check the solution
Sight reduction is the process of deriving from a sight the information needed for establishing a line of position.
This app is a calculator to get the intercept from the assumed position of the observer AP(latitude, longitude), the geographical position of the celestial body observed, GP(Dec, GHA), and its corrected altitude Ho.
Manual and examples in the developer's website.
Ref: https://en.wikipedia.org/wiki/Sight_reduction
User interface:
- Zoom buttons +/-
- Map types: standard, terrain, and satellite
- GPS location. ("Location" App permission must be allowed. Switch on you GPS, and then automatic location detection is possible)
Previous Versions
Here you can find the changelog of Sight reduction since it was posted on our website on 2016-12-23 09:14:36.
The latest version is 4.10 and it was updated on 2024-04-19 17:50:24. See below the changes in each version.
Sight reduction version 4.10
Updated At: 2023-12-05
Changes: Updated to:
-play-services-maps:18.2.0
-android API 34
Sight reduction version 4.9
Updated At: 2023-11-07
Changes: - Updated to Android API 34
Sight reduction version 4.8
Updated At: 2023-08-24
Sight reduction version 4.6
Updated At: 2021-06-03
Changes: - Updated to Android 11.0
Sight reduction version 4.3
Updated At: 2020-05-01
Changes: - Plot up to 3 Marcq Saint Hilaire Lines of Position on Google maps
- Calculator for Intercept method (p=Ho-Hc, Zn)
- Input for observed altitude Ho or instrumental Hs
- List of navigational stars
- Logbook
- New optimized user interface
- GNSS fix to check the solution
Sight reduction version 4.2
Updated At: 2020-04-06
Changes: - Plot up to 3 Marcq Saint Hilaire Lines of Position on Google maps
- Calculator for Intercept method (p=Ho-Hc, Zn)
- Input for observed altitude Ho or instrumental Hs
- List of navigational stars
- Logbook
- New optimized user interface
Sight reduction version 4.0
Updated At: 2020-03-01
Changes: - Plot up to 3 Marcq Saint Hilaire Lines of Position on Google maps
- Calculator for Intercept method (p=Ho-Hc, Zn)
- Input for observed altitude Ho or instrumental Hs
- Logbook
- New optimized user interface
Sight reduction version 2.9
Updated At: 2017-01-16
Changes: - Plot of the Line of Position on Google maps
Disclaimer
Official Google Play Link
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