ATL06 — Land Ice Height¶

ATL06 provides along-track land ice surface heights at 40 m segment resolution.

Quick Start¶

using SpaceLiDAR, DataFrames

g = granule("ATL06_20220404104324_01881512_006_02.h5")
t = table(g)
df = DataFrame(t)

Default Columns¶

Column	HDF5 Path	Type
`longitude`	`land_ice_segments/longitude`	Float64
`latitude`	`land_ice_segments/latitude`	Float64
`height`	`land_ice_segments/h_li`	Float32
`sigma_geo_h`	`land_ice_segments/sigma_geo_h`	Float32
`h_li_sigma`	`land_ice_segments/h_li_sigma`	Float32
`datetime`	`land_ice_segments/delta_time`	DateTime
`quality`	`land_ice_segments/atl06_quality_summary`	Bool
`height_reference`	`land_ice_segments/dem/dem_h`	Float32
`detector_id`	attribute	—
`strong_beam`	attribute	—

Common Workflows¶

Geoid heights¶

t = table(g)
to_egm2008!(DataFrame(t))  # converts ellipsoidal → geoid heights

Add custom variables¶

vars = SpaceLiDAR.default_variables(g)
push!(vars, Variable(:slope, "land_ice_segments/fit_statistics/dh_fit_dx", Float32))
t = table(g; variables=vars)