https://rstats.me/@mdsumner/114103904777240036
I've used HDF5 here because NETCDF can't do this on windows. On linux probably best to use "NETCDF:{dsn}:time".
(r <- terra::rast("HDF5:\"/vsicurl/https://www.ncei.noaa.gov/data/sea-surface-temperature-optimum-interpolation/v2.1/access/avhrr/198109/oisst-avhrr-v02r01.19810901.nc\"://time"))
class : SpatRaster
dimensions : 1, 1, 1 (nrow, ncol, nlyr)
resolution : 1, 1 (x, y)
extent : 0, 1, 0, 1 (xmin, xmax, ymin, ymax)
coord. ref. :
source : https://oisst-avhrr-v02r01.19810901.nc://time
varname : time
name : time
Warning message:
[rast] unknown extent
terra::values(r)
time
[1,] 1339
r@pntr$metadata(1L)
[[1]]
[1] "CLASS=DIMENSION_SCALE" "long_name=Center time of the day" "NAME=time"
[4] "REFERENCE_LIST=" "units=days since 1978-01-01 12:00:00"
[6] "_Netcdf4Dimid=0"