PDS logoPlanetary Data System
PDS Information
Find a Node - Use these links to navigate to any of the 8 publicly accessible PDS Nodes.

This bar indicates that you are within the PDS enterprise which includes 6 science discipline nodes and 2 support nodes which are overseen by the Project Management Office at NASA's Goddard Space Flight Center (GSFC). Each node is led by an expert in the subject discipline, supported by an advisory group of other practitioners of that discipline, and subject to selection and approval under a regular NASA Research Announcement.

Earth: molecular spectral regions


CO2 15 µm spectral region
nu2 (667.381 bending mode) vibrational-rotational band
nu1 (1388.23 symmetric stretch mode) fermi-resonance stimulated by nu2 (618.029, 720.805)
B(CO2) = 0.39 cm-1
Q-branch at 667.5 (2 mb)
line wings have 1.5 scale height wide weighting functions
line centers have 2.5 scale height weighting functions

CO2 band correlation parameters at 180 K, Cess & Ramanathan, 1972
band
cm-1
S at 180 K
cm-2 amagat
A0
cm-1
gamma0
atm-1 cm-1
d
cm-1
66754917.30.097(300/T)(2/3)1.56
2350450515.40.097(300/T)(2/3)??
371510232.20.097(300/T)(2/3)??

CO2 band correlation parameters, Kiehl & Ramanathan, 1983
band
cm-1
transition
nu1nu2nu3
S at 300 K
cm-2 amagat
Ej
cm-1
d
cm-1
667.3810000 --> 01101940.01.56
667.7510110 --> 022015667.3810.78
720.805(I) 0110 --> 10005.00667.3811.56
618.029(II) 0110 --> 10004.27667.3811.56
668.1070220 --> 03300.851335.1310.78
647.063(II) 1000 --> 11100.71285.4101.56
668.670(I) 1000 --> 11100.31388.1851.56

NOTE: for C12O16O17 and C12O16O18 the mean line spacing is 0.78 for all bands

gamma0 = 0.067 (300/T)(2/3) atm-1 cm-1
A0 = 22.18 (T/296)0.5 cm-1
S(T) appeq S(T0) · (T0/T) [ (1 - exp(-1.439 nu/T))3 ] / [(1 - exp(-1.439 nu/T0))3 ]

CO2 4.3 µm spectral region
nu3 (2349.16 asymmetric stretch mode) band, no Q-branch
high T dependence of high J lines makes narrower weighting functions free of isotopes and hot lines

H2O 6.3 µm spectral region}

bandH2OHDO
nu13657.052723.68
nu21594.751403.49
nu33755.933707.47

non-linear molecule with angle of 104.45° nu1 ~ nu3 ~ 2 · nu2

O3 9.6 µm spectral region
nu1 1110 cm-1
nu2 1045 cm-1
nu3 701 cm-1

CH4 spectrum
of the 9 modes, only nu1 through nu4 are independent, and nu3 and nu4 are triply degenerate.
13C is 1.108 % of all Carbon

The Strongest Bands of Methane (rel. to ground state) from Andrews et al.
band12CH413CH4
nu41310.761302.77
nu21533.37
nu33018.923009.53
2nu42612
nu2 + nu428302822
2nu2 + nu43062
nu1 + nu44223
nu3 + nu44340
nu2 + nu34540

CH4 band correlation parameters, Cess & Chen, 1975
band
cm-1
S
cm-2 amagat-1
A0
cm-1
gamma0
atm-1 cm-1
d
cm-1
130618552(T/300)0.50.075(300/T)0.55.3
3020320124(T/300)0.50.075(300/T)0.510.5
422020124(T/300)0.50.075(300/T)0.510.5
58613124(T/300)0.50.075(300/T)0.510.5