Hope it helps some people get more into the air game.
DAY 1
STEP 1
This is turn 7 I am worried about ~200 VVS bombers hitting the Divisions of my Motorised Corps who have crossed the Dnepr River near Kiev. I set up an Air Superiority Directive east of Kiev. I think it was a size 4 box. Set up to fly every day. I deliberately use a small number of fighters (4) to keep down my OPS losses.

I think this is a screenshot from the subsequent turn, I think I lowered the number of fighters to two before I took the picture.
Air Superiority and Naval Patrol fly before all other directives. Based on the Logistics Report, of which an extract is displayed, it looks like two Air Superiority Directives “clash” and trigger an air battle (pure speculation as to what this means but the same thing plays out on other days). This can be seen by the Dark Blue highlighting.
At this altitude the speed of the Bf 109s is superior. Note how the AS Directive drew units from both Stab/JG 3 and 1/JG 3. (In step 2A and 2B they fly separately below).
STEP 2
Enemy bombers move into my AS box, presumably from the direction of Poltava air base (highlighted in Burgundy red).
STEP 2A
They are first intercepted by a lone hunter from Stab/JG 3. He shoots down 3 of them and returns to base (perhaps reporting the flight path of the enemy bombers). Lime Green highlighting.

STEP 2B
Perhaps alerted by the lone hunter from Stab and/or already in the air, 3 fighters from II/JG 3 intercept the Soviet bombers. They down 2 each (again, perhaps reporting the flight path back to base). Yellow highlighting.
STEP 2C
The Soviet bombers reach their target and prepare for their bombing run. From the direction of the sun emerge a terrifying mass of 64 Luftwaffe fighters. Most likely alerted by the two previous encounters by fighters on Air Superiority missions, they pounce and annihilate the massed Soviet bomber formation. Orange highlighting. Maybe I just got lucky.
Note from the battle reports how all three of the STEP 2 encounters are linked. This can be seen by clicking on the hyperlink in the centre of the battle report.