@article{
 title = {Effects of Flow Unsteadiness on Hypersonic Wind-Tunnel Spectroscopic Diagnostics},
 type = {article},
 year = {1970},
 volume = {8},
 websites = {http://arc.aiaa.org},
 id = {0a720f19-081f-3a31-a26b-4979bde64c39},
 created = {2021-05-31T23:14:20.146Z},
 accessed = {2021-05-31},
 file_attached = {true},
 profile_id = {6476e386-2170-33cc-8f65-4c12ee0052f0},
 group_id = {5a9f751c-3662-3c8e-b55d-a8b85890ce20},
 last_modified = {2021-05-31T23:14:23.072Z},
 read = {false},
 starred = {false},
 authored = {false},
 confirmed = {false},
 hidden = {false},
 citation_key = {weeks:aj:1970},
 private_publication = {false},
 abstract = {An analysis is presented of nonlinear effects of time varying flow properties on interpretation of spectroscopic measurements. Both direct emission as well as electron beam techniques are considered. A method, based on this analysis, is evolved whereby both average and mean square fluctuating temperatures can be obtained using conventional instrumentation. The method is applied to several selected experimental cases cited in the literature, including recent arc-heated hypersonic wind tunnel electron beam measurements. The theory is extended to include species number density fluctuations when temperature fluctuations are also present. Nomenclature A n m = spontaneous transition probability c = speed of light E m-electron energy level 0(vi) = vibrational term value (Nz X Is) g m = statistical weight h = Planck's constant / = line or band intensity k = Boltzmann's constant J£' = rotational quantum number q(v f ,v") = Franck-Condon factor R = line or band intensity ratio T = static temperature v = frequency B r = characteristic rotational temperature Subscripts e = excitation 0 = reference conditions r = rotational i) = vibrational},
 bibtype = {article},
 author = {Weeks, Thomas M},
 doi = {10.2514/3.5926},
 journal = {AIAA Journal},
 number = {8}
}

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