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Re: Physical constants in IDL with !CONST [message #82558 is a reply to message #82525]

Fri, 21 December 2012 16:19

chris_torrence@NOSPAM is currently offline

chris_torrence@NOSPAM
Messages: 528
Registered: March 2007

Senior Member

Hi all,

Here's the current list of constants:

IDL> help,!const,/full
** Structure !CONST, 33 tags, length=264, data length=264:
ALPHA DOUBLE 0.0072973525697999997
AU DOUBLE 149597870700.00000
C DOUBLE 299792458.00000000
DTOR DOUBLE 0.017453292519943299
E DOUBLE 1.6021765650000000e-019
EPS0 DOUBLE 8.8541878170000005e-012
EULER DOUBLE 2.7182818284590451
F DOUBLE 96485.336500000005
G DOUBLE 6.6742799999999995e-011
GN DOUBLE 9.8066499999999994
H DOUBLE 6.6260695699999996e-034
HBAR DOUBLE 1.0545717259999999e-034
K DOUBLE 1.3806488000000000e-023
M_EARTH DOUBLE 5.9721863899999997e+024
M_SUN DOUBLE 1.9884158605700001e+030
ME DOUBLE 9.1093829099999999e-031
MN DOUBLE 1.6749273509999999e-027
MP DOUBLE 1.6726217770000001e-027
MU0 DOUBLE 1.2566370613999999e-006
N0 DOUBLE 2.6867805000000001e+025
NA DOUBLE 6.0221412899999997e+023
P0 DOUBLE 101325.00000000000
PHI DOUBLE 1.6180339887498949
PI DOUBLE 3.1415926535897931
R DOUBLE 8.3144621000000001
R_EARTH DOUBLE 6378136.5999999996
RTOD DOUBLE 57.295779513082323
RE DOUBLE 2.8179403267000001e-015
RYDBERG DOUBLE 10973731.568538999
SIGMA DOUBLE 5.6703730000000003e-008
T0 DOUBLE 273.14999999999998
U DOUBLE 1.6605389209999998e-027
VM DOUBLE 0.022413967999999999

Comments or suggestions?

-Chris
p.s. some of the "9's" on the ends of the numbers are just due to the finite precision of double-precision numbers. For example, in the C code, T0 really is defined as 273.15.
p.p.s. Happy Holidays!

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[Message index]

		Physical constants in IDL with !CONST By: chris_torrence@NOSPAM on Tue, 18 December 2012 14:34
		Re: Physical constants in IDL with !CONST By: Jeremy Bailin on Sun, 23 December 2012 20:21
		Re: Physical constants in IDL with !CONST By: chris_torrence@NOSPAM on Fri, 21 December 2012 16:19
		Re: Physical constants in IDL with !CONST By: David Fanning on Thu, 20 December 2012 12:59
		Re: Physical constants in IDL with !CONST By: Paul Van Delst[1] on Thu, 20 December 2012 12:31
		Re: Physical constants in IDL with !CONST By: chris_torrence@NOSPAM on Thu, 20 December 2012 11:10
		Re: Physical constants in IDL with !CONST By: PMan on Thu, 20 December 2012 10:41
		Re: Physical constants in IDL with !CONST By: Heinz Stege on Thu, 20 December 2012 09:36
		Re: Physical constants in IDL with !CONST By: David Fanning on Thu, 20 December 2012 09:08
		Re: Physical constants in IDL with !CONST By: chris_torrence@NOSPAM on Thu, 20 December 2012 09:02
		Re: Physical constants in IDL with !CONST By: ben.bighair on Thu, 20 December 2012 07:03
		Re: Physical constants in IDL with !CONST By: wlandsman on Thu, 20 December 2012 06:24
		Re: Physical constants in IDL with !CONST By: chris_torrence@NOSPAM on Wed, 19 December 2012 21:37
		Re: Physical constants in IDL with !CONST By: Craig Markwardt on Wed, 19 December 2012 20:43
		Re: Physical constants in IDL with !CONST By: jeffnettles4870 on Wed, 19 December 2012 19:36
		Re: Physical constants in IDL with !CONST By: Russell Ryan on Wed, 19 December 2012 19:07
		Re: Physical constants in IDL with !CONST By: vlk.astro on Wed, 26 December 2012 12:31
		Re: Physical constants in IDL with !CONST By: Mats Löfdahl on Mon, 24 December 2012 01:37

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