Commentary from a Telegram post. There are several graphical panels showing the strength of the artillery combat aviation groups used in Kharkov, alas all in Ukrainian language.
The artillery group has the same combat power as a Russian artillery division
[Telegra.ph] OTG "Kharkov" has 65 towed howitzers, 25 MLRS, 88 mortars and 86 anti-tank guns at its disposal. NATO calibers are not involved in this direction, in the main Soviet calibers are 152mm and 122mm.
In the interests of OTG "Kharkov" there are 4 airfields from which they operate:
MiG-29 - 1
Su-27 - 2
Su-25 - 1
Su-24 - 2
Mi-8 - 1
The number may vary when additional vehicles are transferred to these airfields.
In a week, 14 sorties of fighters and bombers and up to 42 Mi-8 sorties are provided in the zone of operation of the Kharkiv OTC. This limit is not used.