Схема сканирования пространства радиометром при экспериментальных исследованиях пространственной (а), пространственно-временной (б) и временной (в) изменчивости флуктуаций яркости излучающих неоднородностей атмосферного фона

Scanning space during experimental research in only spatial (a) both spatial and time (b) and only time (c) AB radiating heterogeneities fluctuations variability by radiometer.

особенно сомнения по поводу only и both, и также насчет "изменчивость флуктуаций" как " fluctuations variability"

заранее спасибо

Use parentheses to enumerate when listing within the text. Place the number before the item it is listing, not after. Do not use а hyphen or dash after the number. Always use parentheses in pairs, not singly. These rules apply as well to figure captions and other parts of the text.
Example
Three applications are possible: (1) isomerization, (2) transformation, and (3) shift.

Radiometer space scanning during the experimental research of AB heterogeneities fluctuations of atmospheric background: (a) spatial only, (b) spatial and time, and (c) time only.