Spectrum of Venus recorded by TEXES, integrated over the whole disk, covering the 1350−1351 cm-1 range. TEXES Data: January data (black crosses), October data (thick black line). The spectral resolution is 0.016 cm-1. Models: CO2 (thin black line), HDO (3 ppm, thin blue line), SO2 (thin red line, 100 ppb). Both TEXES spectra are Doppler shifted and the abcissa axis is rest frequencies. The difference between the Doppler shifts is about 0.1 cm-1. The broad absorption features are due to terrestrial contamination. It can be seen that this contamination is much stronger in October than in January, so that the two HDO lines detected in January at 1350.20 and 1350.26 cm-1 are not detected in October. Two SO2 lines remain detected around 1350.12 cm-1 and 1350.69 cm-1.
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