where

Ed* = normalized gross error for all hourly

prediction-observation pairs for hourly

observed values >60 ppb

NT = total number of station hours (defined

previously)

N = number of monitoring stations

Hi = number of hourly prediction-observation pairs

for monitoring station i

co(i,j) = observed value >60 ppb at monitoring station

i for hour j

cp(i,j) = predicted value at monitoring station i for

hour j

OTHER SUGGESTED PERFORMANCE MEASURES

_

1. Average Station Peak Prediction Accuracy

where

_

A = mean paired peak prediction accuracies

averaged over all monitoring stations

N = number of monitoring stations

Co(i,ti) = peak observed value at monitoring station i

for hour ti

Cp(i,ti) = predicted value at monitoring station i for

hour ti

ti = hour of peak observed value at monitoring

station i

n1201 - n1202 - n1203 - n1204 - n1205 - n1206 - n1207 - n1208 - n1209 - n1210 - n1211 - n1212 - n1213 - n1214 - n1215 - n1216 - n1217 - n1218 - n1219 - n1220 - n1221 - n1222 - n1223 - n1224 - n1225 - n1226 - n1227 - n1228 - n1229 - n1230 - n1231 - n1232 - n1233 - n1234 - n1235 - n1236 - n1237 - n1238 - n1239 - n1240 - n1241 - n1242 - n1243 - n1244 - n1245 - n1246 - n12247 - n1248 - n1249 - n1250

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