Difference between revisions of "Atmospheric Pressure"
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The [[Atmospheric Pressure|Standard Atmosphere]] is a unit of pressure. | The [[Atmospheric Pressure|Standard Atmosphere]] is a unit of pressure. | ||
* It is a kind of [[Metric]] used in [[Planetology]]. | * It is a kind of [[Metric]] used in [[Planetology]]. | ||
| + | * It is a measure of the [[atmosphere]] of a [[world]]. | ||
* Atmospheric pressure may also be measured in bars and millibars. | * Atmospheric pressure may also be measured in bars and millibars. | ||
== Description ([[Specifications]]) == | == Description ([[Specifications]]) == | ||
| − | The descriptions of [[Atmosphere]]s are given in the relative terms of [[Standard Atmosphere]]s rather than the absolute units as a method of making comparisons to the human physiological norm easier. | + | The descriptions of [[Atmosphere]]s are given in the relative terms of [[Standard Atmosphere]]s, rather than the absolute units, as a method of making comparisons to the human physiological norm easier. |
| − | One Atmosphere is defined as being precisely equal to 101.325 kPa. | + | One Imperial Standard Atmosphere is defined as being precisely equal to 100 [[Pascal|kPa]] ([[Pascal|kilopascal]]s), based on the old Terran Standard Atmosphere of 101.325 kPa. The [[Pascal|pascal]] is a unit of [[metric|force]] used to quantify pressure and is defined as one [[newton]] per square [[meter]]. |
| − | * The standard abbreviation is ''atm''. | + | * The Atmosphere was originally based on the mean surface atmospheric pressure of [[Terra]]. |
| + | * The standard abbreviation is ''[[atm]]''. | ||
| + | |||
| + | === Atmosphere Types === | ||
| + | Within [[Charted Space]], the [[atmosphere]]s of [[world]]s are rated according to a standard scale, based on their mean surface pressure. | ||
| + | * Atmosphere code 0: [[Vacuum|Vacuum Pressure Atmosphere]] (less than 0.001 [[atm]]) | ||
| + | * Atmosphere code 1: [[Trace Atmosphere|Trace Pressure Atmosphere]] (less than 0.1 [[atm]]) | ||
| + | * Atmosphere codes 2 and 3: [[Very Thin Atmosphere|Very Thin Pressure Atmosphere]] (between 0.1 and 0.42 [[atm]]) | ||
| + | * Atmosphere codes 4 and 5: [[Thin Atmosphere|Thin Pressure Atmosphere]] (between 0.42 and 0.7 [[atm]]) | ||
| + | * Atmosphere codes 6 and 7: [[Standard Atmosphere|Standard Pressure Atmosphere]] (between 0.7 and 1.5 [[atm]]) | ||
| + | * Atmosphere codes 8 and 9: [[Dense Atmosphere|Dense Pressure Atmosphere]] (between 1.5 and 2.5 [[atm]]) | ||
| + | * Typically Atmosphere code A+: Very Dense Pressure Atmosphere (above 2.5 [[atm]]) | ||
| + | * Typically Atmosphere code B+: Extreme Pressure Atmosphere (above 100 [[atm]]) | ||
== History & Background ([[Dossier]]) == | == History & Background ([[Dossier]]) == | ||
| − | The | + | The Atmosphere was first defined as a unit of pressure on [[Terra (world)|Terra]] prior to the foundation of the [[Terran Confederation]]. It was defined as the mean surface pressure of [[Terra (world)|Terra's]] [[atmosphere]]. The true atmospheric pressure of a [[world]] can vary, even on [[Terra (world)|Terra]]: the local atmospheric pressure can vary from the standard by as much as 15%, affected by weather, temperature, tides, and altitude. [[Technologist]]s found the Atmosphere useful as the concept of the [[Technology Level]] and standardized ideas about sophont society development began to take form.{{Unpublished cite|author= [[Maksim-Smelchak]] }} |
| + | |||
| + | The Imperial Standard Atmosphere is based on the old Terran Standard Atmosphere, and is metrically defined to be exactly 100 kPa. | ||
| + | === Image Repository === | ||
| + | No information yet available. | ||
| − | == References & Contributors (Sources) == | + | == References & Contributors ([[Sources]]) == |
{{Wikipedia|Atmospheric_pressure}} | {{Wikipedia|Atmospheric_pressure}} | ||
{{Intermediate}} | {{Intermediate}} | ||
{{Sources | {{Sources | ||
| − | | | + | |S1= [[Traveller Wiki Editorial Team]] |
| − | |S3= Author & Contributor: Lord (Marquis) and Master of Sophontology [[ | + | |S2= Author & Contributor: Lord (Marquis) and Master Scout Emeritus [[Adie Alegoric Stewart]] of the [[IISS]] |
| + | |S3= Author & Contributor: Lord (Marquis) and Master of Sophontology [[Maksim-Smelchak]] of the [[Ministry of Science]] | ||
}} | }} | ||
{{LE|Atmosphere|Metric}} | {{LE|Atmosphere|Metric}} | ||
Latest revision as of 10:19, 7 December 2025
The Standard Atmosphere is a unit of pressure.
- It is a kind of Metric used in Planetology.
- It is a measure of the atmosphere of a world.
- Atmospheric pressure may also be measured in bars and millibars.
Description (Specifications)[edit]
The descriptions of Atmospheres are given in the relative terms of Standard Atmospheres, rather than the absolute units, as a method of making comparisons to the human physiological norm easier.
One Imperial Standard Atmosphere is defined as being precisely equal to 100 kPa (kilopascals), based on the old Terran Standard Atmosphere of 101.325 kPa. The pascal is a unit of force used to quantify pressure and is defined as one newton per square meter.
- The Atmosphere was originally based on the mean surface atmospheric pressure of Terra.
- The standard abbreviation is atm.
Atmosphere Types[edit]
Within Charted Space, the atmospheres of worlds are rated according to a standard scale, based on their mean surface pressure.
- Atmosphere code 0: Vacuum Pressure Atmosphere (less than 0.001 atm)
- Atmosphere code 1: Trace Pressure Atmosphere (less than 0.1 atm)
- Atmosphere codes 2 and 3: Very Thin Pressure Atmosphere (between 0.1 and 0.42 atm)
- Atmosphere codes 4 and 5: Thin Pressure Atmosphere (between 0.42 and 0.7 atm)
- Atmosphere codes 6 and 7: Standard Pressure Atmosphere (between 0.7 and 1.5 atm)
- Atmosphere codes 8 and 9: Dense Pressure Atmosphere (between 1.5 and 2.5 atm)
- Typically Atmosphere code A+: Very Dense Pressure Atmosphere (above 2.5 atm)
- Typically Atmosphere code B+: Extreme Pressure Atmosphere (above 100 atm)
History & Background (Dossier)[edit]
The Atmosphere was first defined as a unit of pressure on Terra prior to the foundation of the Terran Confederation. It was defined as the mean surface pressure of Terra's atmosphere. The true atmospheric pressure of a world can vary, even on Terra: the local atmospheric pressure can vary from the standard by as much as 15%, affected by weather, temperature, tides, and altitude. Technologists found the Atmosphere useful as the concept of the Technology Level and standardized ideas about sophont society development began to take form.[1]
The Imperial Standard Atmosphere is based on the old Terran Standard Atmosphere, and is metrically defined to be exactly 100 kPa.
Image Repository[edit]
No information yet available.
References & Contributors (Sources)[edit]
|
This page uses content from Wikipedia. The original article was at Atmospheric_pressure. The list of authors can be seen in the page history. The text of Wikipedia is available under the Commons Attribution-ShareAlike 3.0 Unported License. |
This list of sources was used by the Traveller Wiki Editorial Team and individual contributors to compose this article. Copyrighted material is used under license from Mongoose Publishing or by permission of the author. The page history lists all of the contributions.
- Traveller Wiki Editorial Team
- Author & Contributor: Lord (Marquis) and Master Scout Emeritus Adie Alegoric Stewart of the IISS
- Author & Contributor: Lord (Marquis) and Master of Sophontology Maksim-Smelchak of the Ministry of Science
- ↑ Information provided to the library by Maksim-Smelchak