Some aircraft also provide turbulence data in the form of either vertical acceleration or eddy dissipation rate. A small subset of aircraft, mostly UPS, also provide moisture data. Data quality is comparable to other upper-air data sources as indicated in the papers of Lord, et al. Vertical resolution of the data varies by airline. For example, vertical resolution of data from United is usually 2000 feet.
Some carriers provide data every few hundred feet at lower levels.
These differences in vertical resolution are critical for some applications. The impact on data availability is that data is most frequent from airports with jet service from the participating air carriers. Such data can be a useful supplement to upper-air data from the more widely spaced and less frequently available raob soundings. However, the moisture data that is available is of high quality. Vertical resolution of the data in the lowest several thousand feet of the atmosphere ranges from a few hundred feet to 2000 feet or so depending on the carrier.