Spring 1997
where:
To = orbital period, sec
Rp = planet radius, km (about 6380 km for earth)
H' = orbit altitude (above planet's surface), km
gs = gravitational acceleration at planet's surface (.00981 km/sec2 for earth)
where: N = # different color composites,
n = # of single-band images available
3 = # of color assignments (blue, green, and red), and
! = factorial
where: E = spectral emission in W/m2 m at a wavelength ,
= wavelength in m,
C1 = 3.74 X 10-6 Wm2 (first radiation constant) ,
C2 = 1.44 X 10-2 mK (second radiation constant),
e = 2.718 (base of natural logarithms), and
T = absolute temperature (K).
where: Ebb = radiant emittance from a blackbody in W/m2,
= 5.67 X 10-8 W/m2K-4 (Stefan-Boltzmann constant), and
T = absolute temperature (K).
where: W = 2,897 mK (Wiens constant), and
T = absolute temperature (K)
where: C = thermal storage
= density
and c = thermal capacity
where: k = thermal diffusivity
and K = thermal conductivity
where: P = thermal inertia