AMSR2 file versions

[raymondben]

> raadfiles::amsr2_daily_files() %>% dplyr::filter(date == as.POSIXct("2014-12-03")) %>% pull(fullname)
[1] "/rdsi/PUBLIC/raad/data/seaice.uni-bremen.de/data/amsr2/asi_daygrid_swath/s6250/2014/dec/Antarctic/asi-AMSR2-s6250-20141203-v5.tif"

is using the v5 file version, but the 5.4 exists:

> file.exists("/rdsi/PUBLIC/raad/data/seaice.uni-bremen.de/data/amsr2/asi_daygrid_swath/s6250/2014/dec/Antarctic/asi-AMSR2-s6250-20141203-v5.4.tif")
[1] TRUE

The v5 files have a different extent to the v5.4 (actually they probably do not in reality, maybe it's a file metadata problem):

> ext(rast("/rdsi/PUBLIC/raad/data/seaice.uni-bremen.de/data/amsr2/asi_daygrid_swath/s6250/2014/dec/Antarctic/asi-AMSR2-s6250-20141203-v5.4.tif"))
SpatExtent : -3950000, 3950000, -3950000, 4350000 (xmin, xmax, ymin, ymax)

> ext(rast("/rdsi/PUBLIC/raad/data/seaice.uni-bremen.de/data/amsr2/asi_daygrid_swath/s6250/2014/dec/Antarctic/asi-AMSR2-s6250-20141203-v5.tif"))
SpatExtent : -3946875, 3953125, -3953125, 4346875 (xmin, xmax, ymin, ymax)

(which means that read_amsr2_ice will fail if some files resolve to v5 and others to v5.4, because the extents differ).

I don't think I can force bowerbird to only retrieve 5.4 files, because some v5 files don't have a 5.4 version available. I assume that raadfiles is reducing the full directory listing to one file per date: can we get it to choose the highest version for each file?

The same issue might be affecting other seaice.de data sets but I have not checked.

[mdsumner]

this definitely needs a more careful check, and I should remove some functions but this is the one used by raadtools::read_amsr2_3k_ice

amsr2_3k_daily_files

I have left in various versions for reasons I cannot remember now, so I should clean this up