solsys
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[[Syntax]]: solsys("field") or solsys("structure") | [[Syntax]]: solsys("field") or solsys("structure") | ||
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dv> solsys() | dv> solsys() | ||
solsys returns descriptions of solar system planet structures | solsys returns descriptions of solar system planet structures | ||
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solsys("fieldname") returns description of the input field | solsys("fieldname") returns description of the input field | ||
e.g. solsys("M") returns "Mass (in kilograms)" | e.g. solsys("M") returns "Mass (in kilograms)" | ||
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solsys("structname") prints a full description of the specified structure | solsys("structname") prints a full description of the specified structure | ||
e.g. solsys("Mars") explains every field in the Mars structure | e.g. solsys("Mars") explains every field in the Mars structure | ||
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Input must be a string | Input must be a string | ||
Values in SI/mks units, from NASA planetary fact sheets: | Values in SI/mks units, from NASA planetary fact sheets: | ||
| − | + | http://nssdc.gsfc.nasa.gov/planetary/planetfact.html | |
| − | + | S.Marshall 02-18-2008 | |
| − | S.Marshall | + | |
| + | 0 | ||
dv> solsys("Mars") | dv> solsys("Mars") | ||
Mars | Mars | ||
| − | M = 6. | + | M = 6.4185e+23 kg Mass |
| − | R = 3. | + | R = 3.3895e+06 m Volumetric mean radius |
| − | rho = 3933 kg/m^3 | + | rho = 3933 kg/m^3 Mean mass density |
| − | aB = 0. | + | aB = 0.250 Bond albedo |
| − | aV = 0. | + | aV = 0.150 Visual geometric albedo |
| − | H = | + | H = -1.52 Absolute visual magnitude |
| − | tr = 30000 m | + | tr = 30000 m Topographic range |
| − | kI = 0. | + | kI = 0.366 Moment of inertia coefficient (I/MR^2) |
| − | a = 2. | + | a = 2.2792e+11 m Semimajor axis of orbit |
| − | yr = 5. | + | yr = 5.93551e+07 s Sidereal year (revolution period) |
| − | e = 0. | + | e = 0.0935 Orbital eccentricity |
| − | srp = 88642. | + | srp = 88642.4 s Sidereal rotation period |
| − | day = 88774. | + | day = 88774.9 s Length of day |
| − | eps = 25. | + | eps = 25.19 degrees Rotation axial tilt |
| − | P = 636 Pa | + | P = 636 Pa Atmospheric pressure at surface |
| − | rhoa = 0. | + | rhoa = 0.020 kg/m^3 Density of air at surface |
| − | T = 210 K | + | T = 210 K Average surface temperature |
| − | mua = 43. | + | mua = 43.34 g/mol Mean molecular weight of atmospheric air |
0 | 0 | ||
| − | dv> solsys(" | + | dv> solsys("R") |
| − | " | + | "Volumetric mean radius (for near-spherical objects; |
| − | for | + | median axis radius for irregular objects; in meters)" |
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*[[conhelp]] | *[[conhelp]] | ||
*constants.dvrc | *constants.dvrc | ||
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}} | }} | ||
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[[category:Functions]] | [[category:Functions]] | ||
[[category:User Defined Functions]] | [[category:User Defined Functions]] | ||
[[category:General_Science]] | [[category:General_Science]] | ||
Revision as of 17:48, 18 February 2008
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Contents: Description, Arguments, Usage, Examples, Sub-Functions, Related Functions, Source Supported Under Version: >1.00
Description Displays description of solar system structures (Sun, Earth, Moon, Mars, Phobos, Deimos) or a description of a field in those structures This is a user-defined function from constants.dvrc
Arguments and Return Values Arguments: A string with the name of the structure or field for which a description is needed Return Value: When given the name of one of the solar system structures, the function prints a description of each element of the structure (but returns zero). When given the name of one of the fields in the structures, it returns a string with the description of the field. If no arguments are input, solsys() prints its description, as shown below.
Usage Syntax: solsys("field") or solsys("structure")
Examples dv> solsys()
solsys returns descriptions of solar system planet structures
solsys("fieldname") returns description of the input field
e.g. solsys("M") returns "Mass (in kilograms)"
solsys("structname") prints a full description of the specified structure
e.g. solsys("Mars") explains every field in the Mars structure
Input must be a string
Values in SI/mks units, from NASA planetary fact sheets:
http://nssdc.gsfc.nasa.gov/planetary/planetfact.html
S.Marshall 02-18-2008
0
dv> solsys("Mars")
Mars
M = 6.4185e+23 kg Mass
R = 3.3895e+06 m Volumetric mean radius
rho = 3933 kg/m^3 Mean mass density
aB = 0.250 Bond albedo
aV = 0.150 Visual geometric albedo
H = -1.52 Absolute visual magnitude
tr = 30000 m Topographic range
kI = 0.366 Moment of inertia coefficient (I/MR^2)
a = 2.2792e+11 m Semimajor axis of orbit
yr = 5.93551e+07 s Sidereal year (revolution period)
e = 0.0935 Orbital eccentricity
srp = 88642.4 s Sidereal rotation period
day = 88774.9 s Length of day
eps = 25.19 degrees Rotation axial tilt
P = 636 Pa Atmospheric pressure at surface
rhoa = 0.020 kg/m^3 Density of air at surface
T = 210 K Average surface temperature
mua = 43.34 g/mol Mean molecular weight of atmospheric air
0
dv> solsys("R")
"Volumetric mean radius (for near-spherical objects;
median axis radius for irregular objects; in meters)"
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