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title: "sRPHD definition"
canonical: "https://servicedesk.maxgeo.com/space/MAXGEO/1067188225/sRPHD%20definition"
format: markdown
---
mean of relative percent half difference (sRPHD). This is calculated as   
follows for each original / repeat result pair: 

RPHD = 100 x (Original Result – Repeat Result) /(Original Result + Repeat Result)