The phrase "altitude class" is correct and usable in written English.
It can be used in contexts related to aviation, meteorology, or any field where different levels of altitude are categorized or classified.
Example: "The aircraft is designed to operate efficiently within the altitude class of 30,000 to 40,000 feet."
Alternatives: "altitude category" or "elevation class".
People who like being on top during sex are a 'Professional and Appreciative of Altitude' class.
He said Google would like to see low altitude "Class G" airspace carved out for drones, saying it would keep UAV away from most manned aircraft aside from low-flying helicopters, while enabling drones to fly over highly populated areas.
The genetic diversity (He) of the intermediate altitude class (He = 0.65) was significantly higher (Wilcoxon signed-paired rank test, after Bonferroni correction, P = 0.03) than that of the high altitude class (He = 0.57).
This divergence between different districts but within the same altitude class is consistent with the selection hypothesis, and it is suggestive of different selection intensities at low and high altitudes.
In Ethiopia, a recent study found that differentiation among altitude classes was several times higher than differentiation among geographic districts, with the greatest amount of population differentiation found in the lowest altitude class (Hadado et al. 2010).
To characterise the habitat, the following categorical variables of 35 Radix populations (Table 1) visited during sampling were recorded: altitude class (below/above 1000 m), current (stagnant/slow/fast), depth (less/more than 1 m), permanency (ephemeral/permanent), macrophytes (present/absent) and sediment size (mud/sand/hard).
For the altitude classes, more marked differences were seen (Table 1).
For the altitude classes, the situation was different; indeed, all of the SSR loci were significantly differentiated among the altitude classes, with values varying from 0.03 (Bmag0013) to 0.28 (HVM67).
The differentiation among the low altitude classes of the three districts was higher (FST = 0.10, P < 0.01) than that among the three districts within the intermediate (FST = 0.04, P > 0.05) and high (FST = 0.01, P > 0.05) altitude classes.
The divergence (FST and RST) estimates between the seasons, districts, and altitude classes are given in Table 3.
We also considered the three altitude classes separately within each district, and we performed AMOVA analysis to compute the average unweighted FST estimates between different districts within the same altitude classes (<2,300, 2,300-2,800, >2,800 m a.s.l).. Similarly, the pairwise FST estimates between districts within the same altitude classes were computed.
