A statistical study of strong quasi-two-day waves (QTDWs) is carried out from the intensities and rotational temperatures of OH(6–2) and O₂b(0–1) emissions measured from the “El Leoncito” Astronomical Complex (31.8°S, 69.3°W) between 2006 and 2020. These emissions correspond to layers centered at 87 km and 95 km altitude, respectively. The period, amplitude and phase of each QTDW are obtained after applying rigorous data and spectral conditions. QTDW is the strongest planetary wave in January and is strong during the other summer months. In the rest of the year, the presence of strong QTDWs is more exceptional. Most QTDWs have periods between 45 and 52 h. In January, the periods are mostly concentrated in the range of 45–48 h, with medians of approximately 46 h, for both emissions. The peak of QTDW amplitudes is also reached in January, with total averages greater than 10 K for temperatures and 36% (45%) for OH (O₂) relative intensities. Unlike what happens with the semidiurnal tide, there is no increase of the temperature amplitude with altitude: for January there is rather a slight decrease between the OH and the O₂ layer. QTDWs affect airglow intensities more than temperatures, which is reflected in the large Krassovsky's η ratios (with mean vector modulus of 6.14 (±0.15) for OH and 8.08 (±0.11) for O₂). In a high percentage of cases, the vertical wavelength is long (λ_z > 100 km), especially for the O₂ layer. However, waves with λ_z from 20 km were also detected, and with both directions of vertical propagation. The January averages in the documented years (2008–2012, 2014–2015, 2019–2020), indicate the minimum amplitudes (in intensity and temperature) in 2009 and the maximum amplitudes in 2012. For each of the four observed parameters (intensities and temperatures of OH and O₂) there is a different day-by-day evolution of the QTDW amplitudes.

从OH（6–2）和O ₂ b的强度和旋转温度进行了强准两日波（QTDWs）的统计研究。在2006年至2020年之间，从“ El Leoncito”天文学综合体（31.8°S，69.3°W）测量的（0-1）排放量。这些排放量分别对应于以87 km和95 km为中心的层。每个QTDW的周期，幅度和相位都是在应用严格的数据和频谱条件后获得的。QTDW是1月份最强的行星波，在其他夏季月份则很强。在今年剩余的时间里，强大的QTDW的出现更为罕见。大多数QTDW的周期在45到52小时之间。一月份，这两个时期的排放大部分集中在45-48小时的范围内，中位数约为46小时。一月份也达到了QTDW振幅的峰值，温度的总平均值大于10 K，OH（O _2的平均值大于36％（45％））相对强度。与半日潮不同，温度振幅不会随着海拔的升高而增加：一月份OH和O ₂层之间的温度略有下降。QTDWs影响气辉强度超过的温度，这反映在大克拉索夫斯基的η比（与OH的6.14平均矢量模量（±0.15）和8.08（±0.11）代表O ₂）。在箱子的高百分比，垂直波长长（λ _ž  >100公里），尤其是对于将O ₂层。然而，波λ _ž还检测到了20 km以外的距离，并且具有垂直传播的两个方向。有记录的年份（2008-2012年，2014-2015年，2019-2020年）的1月平均值表示2009年的最小振幅（强度和温度）和2012年的最大振幅。在OH和O _2的温度下），QTDW振幅每天都有不同的变化。