SITE(S) LINE N MEANDIF MEDIANDIF STDEVDIF NWR - cal LT 78 0.114 0.089 0.154 FEF - cal LT 87 -0.112 -0.104 0.076 SPL - cal LT 89 -0.259 -0.253 0.137 HDP - cal LT 93 -0.112 -0.118 0.096