We are in the process of migrating all NASA Earth science data sites into Earthdata from now until end of 2026. Not all NASA Earth science data and resources will appear here until then. Thank you for your patience as we make this transition.Read about the Web Unification Project
TABLE OF CONTENTS
Description
ATL03 contains height above the WGS 84 ellipsoid, latitude, longitude, and time for each photon downlinked by the Advanced Topographic Laser Altimeter System (ATLAS) instrument on board ICESat-2. This product was designed to be a single source for all photon data and ancillary information needed by higher-level ATLAS/ICESat-2 products.
Version Description
Improved TOF, range calibrations, and range bias correction (average change in range is ~ -0.7 mm); Added a variable (max_valid_stren_strong) to the first photon bias and radiometric correction tables to reflect invalid correction values due to unreliable calibration values; Changed to ITRF2020, resulting in a 7 mm regional height change with maximum values at poles; ANC03/04 products generated from POD solutions use updated global modeling; Correction to the center-of-mass data set generation in ANC04, which should shift the z-component by ~1.0–1.2 cm during airplane mode periods; ANC05 products were calibrated using results from recent full mission week calibration solutions; Used GEOS5-IT for atmosphere delay calculation from NASA GMAO; Updated tide model to an extrapolated FES2014b for ocean, load and long-period tides; Parameters affected in /gtx/geophys_corr include tide_ocean, tide_load, and tide_equilibrium; Updated weight_ph to use DDA-03’s Radial Basis Function Normalized for Instrument Characteristics; Added signal_class_ph as experimental DDA-03 parameter to classify photons using algorithms developed for evaluating weight_ph; Updated quality_ph to include flag values to identify noise bursts and streaks, and all photons in a pulse that are considered nearly or fully saturated and whether the return occurs at the surface, after pulse, impulse response; Added beta_angle and orbit_angle at geoseg rate, carried forward from ATL03g; Cloud optimization of H5 files for more efficient access/use in cloud environments.
Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.
Copy Citation
Citation Copied
Neumann, T., Hancock, D., Robbins, J., Gibbons, A., Lee, J., Brenner, A., Felikson, D., Harbeck, K., Saba, J., Luthcke, S., Rebold, T., Reese, A., & Sutterly, T. (2025). ATLAS/ICESat-2 L2A Global Geolocated Photon Data, Version 7 [Dataset]. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/ATLAS/ATL03.007 Date Accessed: 2026-06-11
Neumann, T., Hancock, D., Robbins, J., Gibbons, A., Lee, J., Brenner, A., Felikson, D., Harbeck, K., Saba, J., Luthcke, S., Rebold, T., Reese, A., & Sutterly, T. (2025). ATLAS/ICESat-2 L2A Global Geolocated Photon Data, Version 7 [Dataset]. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/ATLAS/ATL03.007 Date Accessed: 2026-06-11
Neumann, Thomas, et al. “ATLAS/ICESat-2 L2A Global Geolocated Photon Data, Version 7.” NASA National Snow and Ice Data Center Distributed Active Archive Center, 2025, https://doi.org/10.5067/ATLAS/ATL03.007. Date Accessed: 2026-06-11