Update Energy-Drift-Correction

Energy-Drift-Correction.-.md

@@ -14,7 +14,7 @@ The consequences of an energy drift include:
 -    Misaligned data: The data stacks must be aligned image-by-image in order to correctly interpret the observations.
 -    Image Padding Requirements: Image stacks require padding in order to keep features of interest within the measured area over the full energy range.
 -    Limited Fine-stage Movement: A large virtual drift will apply a significant feedback voltage which can push the limits of the sample fine stage and cause a mismatch between the calculate scan-tile regions and the achievable fine stage regions.
--     OSA drift: The OSA alignment is affected by the real drift, but not the virtual drift and so can significantly drift with energy when the sample doesn't (due to the real and virtual drifts being opposite and equal). Since the OSA alignment doesn't require such high precision as the sample, it is typically only an issue when making large changes in energy, such as switching between well-separated absorption edges. 
+-    OSA drift: The OSA alignment is affected by the real drift, but not the virtual drift and so can significantly drift with energy when the sample doesn't (due to the real and virtual drifts being opposite and equal). Since the OSA alignment doesn't require such high precision as the sample, it is typically only an issue when making large changes in energy, such as switching between well-separated absorption edges. 
 
 There are a number of strategies for dealing with energy drift: