ATL03 — Geolocated Photons¶

Version 6 — User Guide · ATBD

ATL03 provides geolocated photon data — every individual photon detected by the ATLAS instrument. This is the highest-resolution ICESat-2 product.

Quick Start¶

using SpaceLiDAR, DataFrames

g = granule("ATL03_20201121151145_08920913_006_01.h5")
t = table(g)
df = DataFrame(t)

Column	HDF5 Path	Type
`longitude`	`heights/lon_ph`	Float64
`latitude`	`heights/lat_ph`	Float64
`height`	`heights/h_ph`	Float32
`quality`	`heights/quality_ph`	Int8
`datetime`	`heights/delta_time`	DateTime
`confidence`	`heights/signal_conf_ph`	Int8
`uncertainty`	`geolocation/sigma_h`	Float32
`segment`	`geolocation/segment_id`	Int32
`sun_angle`	`geolocation/solar_elevation`	Float32
`height_reference`	`geophys_corr/dem_h`	Float32
`detector_id`	attribute	—
`strong_beam`	attribute	—

SpaceLiDAR.default_tracks(g)

("gt1l", "gt1r", "gt2l", "gt2r", "gt3l", "gt3r")

df = DataFrame(t)
# Keep only high-confidence photons
filter!(:confidence => >=(3), df)