I wanted to plot space time graph especially Hovmoller plot using the data having date 2018-01-01 to 2018-01-11. How to make read datewise, data

Question

I wanted to plot space time graph especially Hovmoller plot using the data having date 2018-01-01 to 2018-01-11. How to make read datewise, aod data also

after this I want to plot spatiotemporal variogram any idea how to do it?? Thank you

sp<-select(AOD_st,contains("l"))

space<-SpatialPoints(sp)

WGS84 <- CRS("+init=epsg:4326")

proj4string(space)<-WGS84

data=data.frame(AOD_st[3:length(AOD_st)])

time <- as.POSIXct(c("2018-01-01"),tz="GMT")

endTime<-as.POSIXct(c("2018-01-11"),tz="GMT")

stfdf =STFDF(space,time,data,endTime)

stplot(stfdf,mode="xt",scaleX=0)

This way I was trying My data set is satellite gridded data