1. Set the value to nodata
Statement: SetNull("SVDNB_npp_d20220216.tif" < 0,"SVDNB_npp_d20220216.tif")
2. Set nodata to other values
Statement: Con(IsNull("220202.tif"),-1,"220202.tif")
Statement: SetNull("SVDNB_npp_d20220216.tif" < 0,"SVDNB_npp_d20220216.tif")
Statement: Con(IsNull("220202.tif"),-1,"220202.tif")