The effect that makes "Satellite Cannon" unable to be destroyed by battle with Level 7 or lower monsters is a Continuous Effect.[1]
The effect that increases the ATK of "Satellite Cannon" by 1000 is a Trigger Effect that activates on the field. (This effect does not target. It always activates once during the End Phase.)[1]
While "Satellite Cannon" is face-up in the Monster Zone, and has not attacked, the ATK gained by its effect remains applied. (The increased ATK does not return to 0 if "Satellite Cannon" is attacked by an opponent's monster.)[1]
The effect that returns the increased ATK to 0 after damage calculation if "Satellite Cannon" attacks is a Continuous Effect.[1]