SITE(S) LINE N MEANDIF MEDIANDIF STDEVDIF NWR - cal LT 70 -0.084 -0.106 0.196 FEF - cal LT 86 -0.163 -0.162 0.086 SPL - cal LT 90 -0.287 -0.248 0.208 HDP - cal LT 93 -0.120 -0.132 0.112