The Biefeld-Brown “vector”, or B-B vector, is a simple indicator in the Biefeld-Brown effect.
It might also have a physical interpretation related to the inhomogeneous charge density distribution in the capacitor’s dielectric. It points in the same direction as electric dipole moment.
This “vector” inside the charged asymmetric capacitor always points in the direction from the negative to positive plate.
For example, an atom can be conceptualized as a spherical asymmetric capacitor:
In the case of an atom of ordinary matter, its negative plate is larger, so the B-B vector is said to be “down” (towards nucleus), indicating attractive gravity.
But in the case of an antiatom of antimatter, its B-B vector is “up” (away from nucleus), indicating repulsive gravity (i.e. antigravity).
All atoms composing Earth have their B-B vectors “down”, and atoms composing material bodies on Earth also have their B-B vectors “down”, therefore Earth will attract these material bodies, and material bodies will attract Earth — an attractive gravitational interaction.
On the quantum-scale, Earth and material bodies on Earth are composed of many “capacitors” (atoms) that have their Biefeld-Brown vectors “down”, while at the same time on the macro-scale, Earth is just one big planet-size spherical asymmetric capacitor that has its Biefeld-Brown vector “up”, meaning directed away from its “nucleus”, i.e. from the ground up towards the ionosphere. The conclusion is that Earth produces both: attractive and repulsive gravity at the same time, which do not cancel each other out. This is the reason why the Solar system is stable.
You can read more about B-B vector orientation in the section titled: Quantum Gravity in a Nutshell.