HDF5 file, superblock version 0
group /
dataset /I: float32, shape (30, 1000)
dataset /I_fvec: float64, shape (30, 3)
dataset /I_rvec: float64, shape (1000)
dataset /ionogram_version: int64, shape ()
dataset /lat: float64, shape ()
dataset /lon: float64, shape ()
dataset /t0: uint64, shape ()