Combined ultraviolet spectra of PG0043+039 taken with the HST in the years 2013 and 1991. Indicated are the identifications of the strongest UV emission lines and of the geo-coronal lines, as well as of both cyclotron systems B and A with their second to seventh harmonics. The integer numbers identify the emission humps with multiples of the cyclotron fundamental. Indicated is the power-law continuum F_λ ~ λ^α with α = 0.67 ± 0.02. The modeling of both cyclotron line systems A and B is given at the bottom.