Mogul R, Avice G, Limaye S S, Way M J
Chemistry & Biochemistry Department, California State Polytechnic University, Pomona, CA, USA.
Blue Marble Institute of Science, Seattle, WA USA.
MethodsX. 2023 Jul 28;11:102305. doi: 10.1016/j.mex.2023.102305. eCollection 2023 Dec.
We present the first published method to convert data obtained by the Pioneer Venus Large Probe Neutral Mass Spectrometer (LNMS) into units of mixing ratio (ppm) and volume percent (v%) against CO and N, the dominant Venus atmospheric gases, including conversion to density (kg m). These unit conversions are key to unlocking the untapped potential of the data, which represents a significant challenge given the scant calibration data in the literature. Herein, we show that our data treatments and conversions yield mixing ratios and volume percent values for HO, N, and SO that are within error to those reported for the gas chromatograph (LGC) on the Pioneer Venus Large Probe (PVLP). For the noble gases, we developed strategies to correct for instrument biases by treating the data as a relative scale and using PVLP and Venera-based measurements as calibration points. Together, these methods, conversions, calibrations, and comparisons afford novel unit conversions for the LNMS data and yield unified measures for Venus' atmosphere from the LNMS and LGC on the PVLP.•Conversion into mixing ratio (ppm), volume percent (v%), and density (kg m).•Mixing ratios are expressed against CO and N.•LNMS and LGC measurements on the PVLP are consistent.
我们提出了首个已发表的方法，可将先锋金星大探测器中性质谱仪（LNMS）获取的数据转换为相对于金星大气中主要气体CO和N的混合比（ppm）和体积百分比（v%）单位，包括转换为密度（kg m）。这些单位转换是挖掘这些数据未开发潜力的关键，鉴于文献中校准数据稀少，这是一项重大挑战。在此，我们表明，我们的数据处理和转换得出的HO、N和SO的混合比及体积百分比值，与先锋金星大探测器（PVLP）上气相色谱仪（LGC）报告的值在误差范围内。对于惰性气体，我们制定了策略，通过将数据视为相对尺度并使用基于PVLP和金星号的测量作为校准点来校正仪器偏差。总之，这些方法、转换、校准和比较为LNMS数据提供了新的单位转换，并得出了PVLP上LNMS和LGC对金星大气的统一测量结果。
•转换为混合比（ppm）、体积百分比（v%）和密度（kg m）。
•混合比相对于CO和N表示。
•PVLP上LNMS和LGC的测量结果一致。
