Charlotte E. Moore, already an expert in the compilation of atomic spectra and author of the Princeton Observatory Multiplet Tables of Astrophysical Interest of 1933 and 1945 [5], accepted a position at NBS in 1945 to prepare a handbook of atomic energy levels.
She was married to Bancroft Sitterly, an astronomer and mathematician at American University, and was known throughout NBS as "Mrs.
Sitterly." After retirement, she continued her critical compilation work at NBS into her mid-eighties and also worked for several years at the Naval Research Laboratory on the ultraviolet spectrum of the sun.