The image above represents elevation correction.

To compute for elevation correction, two essential parameters are needed and these parameters are **Free Air Correction (δg _{F}) **and

**Bouguer Correction (δg**

_{B}).The formula for calculating elevation correction:

δg_{E} = δg_{F} – δg_{B}

Where:

δg_{E} = Elevation Correction

δg_{F} = Free Air Correction

δg_{B} = Bouguer Correction

Let’s solve an example;

Find the elevation correction when the free air correction is 12 and the bourger correction is 17.

This implies that;

δg_{F} = Free Air Correction = 12

δg_{B} = Bouguer Correction = 17

δg_{E} = δg_{F} – δg_{B}

δg_{E} = 12 – 17

δg_{E} = -5

Therefore, the **elevation correction **is **-5 mGal.**

**Calculating the Free Air Correction when the Elevation Correction and the Bourger Correction is Given.**

δg_{F} = δg_{E} + δg_{B}

Where;

δg_{F} = Free Air Correction

δg_{E} = Elevation Correction

δg_{B} = Bouguer Correction

Let’s solve an example;

Find the free air correction when the elevation correction is 34 and the bourger correction is 21.

This implies that;

δg_{E} = Elevation Correction = 34

δg_{B} = Bouguer Correction = 21

δg_{F} = δg_{E} + δg_{B}

δg_{F} = 34 + 21

δg_{F} = 55

Therefore, the **free air correction **is **55.**

Continue reading How to Calculate and Solve for Elevation Correction | Gravity