pixel number

The pixel number p [1:Np], given a certain one-way range time $t_a$, can be computed as:

$$p = 1 + {\rm RSR} \cdot 2(t_r - t_{r1})$$ (D40)

Where $t_{r1}$ is also one-way.

The one-way range time for a given pixel (number) p can be computed as:

$$t_r = t_{r1} + {(p-1)\over2{\rm RSR}}$$ (D41)

Where:
RSR is in Hz.
$t_{a1}$ is the range time to pixel 1 (first pixel) in seconds.

The range is of course equal to:

$$r = t_r * c$$ (D42)

Where:
c is the speed of light (constants.h: 299792458. m/s).