What are the x and y axis units in CTF Diagnostic Plot?

Could anyone please let me know what is the unit in x-axis of this plot? Looks like Y axis is in Angstrom though.
Thanks!

Hi @Ashwin-Dhakal ,

The x-axis displays frequency, in units of in inverse angstroms (Å⁻¹). The y-axis is in dimensionless units; it shows the value of a correlation metric (“FIT”) between a re-scaled micrograph power spectrum (“PS”) averaged over a given frequency band, and the CTF value (“CTF”) at that frequency band.

Best,
Michael

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