HDF5 file, superblock version 0
group /
	attribute coord = "mag"
	attribute layer1_dims = 15, 15
	attribute layer1_height = 450000.0
	attribute layer2_dims = 10, 10
	attribute layer2_height = 1500000.0
	attribute linear = (enum of int8 {FALSE, TRUE}, not shown)
	attribute nlayers = 2
	attribute nmaps = 25
	attribute pole_colat = 0.1658062789394612
	attribute pole_long = -1.2671090369478832
	attribute sites = "albh", "algo", "alic", "antc", "areq", "badg", "bake", "bjfs", "bogt", "bor1", "brft", "bshm", "cags", "cas1", "cedu", "chpi", ... (153 values)
dataset /layer1_SHcoefs: float64, shape (25, 256)
dataset /layer2_SHcoefs: float64, shape (25, 121)
dataset /timestamps: float64, shape (25)