実際に検証してみたところ、少なくとも2000 tickは弾が消えないことが確認されました。そのため、Battle Canon の弾消失時間は2400 tickと仮定して修正しました。 以下に新バージョンのBallisitc Calculator V3をリリースしましたのでそちらをお使いください。

When I actually tested it, I confirmed that the bullets do not disappear for at least 2000 ticks. Therefore, I corrected it by assuming that the bullet disappearance time of the Battle Canon is 2400 ticks. Please use the new version of Ballisitc Calculator V3 that has been released below.

https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3432649848

you CAN actually perform indirect fire with a battle cannon, you only have to change the lifetime to say like 2400. 1500ticks of lifetime just doesnt seem correct.

GPSベースのシステムを使って照準したい場合、例えば以下のリンクのFCS Type 4を接続してみてはどうでしょうか。同じようにELI1/ELI2端子に接続すれば機能します。

If you want to use a GPS-based system for aiming, try connecting the FCS Type 4 at the link below. It will work if you connect it to the ELI1/ELI2 terminals in the same way.

https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3359751824

返信が遅れて申し訳ありません。曲射は端子に入力すればバトルキャノンでも使用できますが、弾丸は地面に当たる前に消えてしまうため、ほとんどの場合弾道計算は実行されません。そのため曲射が可能な武器種は、Artillery Cannon、Bertha Cannon、Rocket Launcherの３つとなっています。

Sorry for the late reply. Indirect fire mode can also be used with battle canons, however in most cases ballistic calculations are not performed since the bullet disappears before hitting the ground.
Therefore, the three weapons that can use indirect fire are the Artillery Cannon, Bertha Cannon, and Rocket Launcher.

Is the Inverse mode not available to the Battle cannon only for Artillery cannon?
If so would you kindly add it? :)

how would i convert this from a monitor based system to a gps one

Might check this out for my rocket turret maybe it will work better than my already ballistic computer