png AER,BC,BCPOM,DUST,METEO,POM,SO4,SS AERH2O,AERH2OD,ANGSTROM,AVE,BUD,CCFD,CFREE,CFREED,CHEP,CONC1000,CONC500,CONCZON,EC550ZON,EMI,EMICHEP,ER3D1000,ER3D500,ERD,ERGT053D1000,ERGT053D500,ERLT053D1000,ERLT053D500,LOAD,LOAD05,LOAD05D,LOAD125,LOAD125D,LOADCOA,LOADCOAD,LOADD,MEC550,OD550,OD550D,OD865D,PREC,RH1000,RH500,RHOPTD,SEDDRY,WET an9999 mALLYEAR ps