Spatial interpolation for scattered data

I have a list of metar points (latitude, longitude, sea level pressure) and the pressure needs to be interpolated.

Suppose I want to iterpolate the red point (on the kriging side of the image below) using the known measurements in the METAR summary list (black points in the image).

Can regular kriging be used to interpolate just one point? And How?

I don't need a grid with all interpolated points.

(I am developing for android with java.)

I just don't understand the formulas in Kriging .

Here they only compute one point using kriging on pages 27-28.

in section 2.1 of this paper .