ATLAS/ICESat-2 L1B Converted Telemetry Data, Version 2
Data set id:
ATL02
DOI: 10.5067/ATLAS/ATL02.002
There is a more recent version of these data.
Version Summary
Version Summary
Changes for this version include:
- Fully verified and debugged outputs used to help confirm the time of flight (TOF) and transmitter echo path (TEP) calculations.
- Receiver skews are now calculated from on-orbit data to improve precision and fidelity.
- Updated the description of ph_id_channel to clarify and correct errors in the documentation.
- Clarified and corrected errors in the ATL02 ATBD and data dictionary related to units and descriptions.
- Changed the thermistor used for LRS-based laser energy conversions from the LRS_HKT packet to the ldc_t (channel 33). The code now uses the temperature sensor on which CAL 54 was based.
- Fixed the code to correctly record the CAL47 calibrations used to compute receiver sensitivity. Replaced a bad CAL47 instance, which affected “spot 2” background and return sensitivity, with a corrected instance.
- Fixed an issue that erroneously set the useflag to “AMCS CAL”. The useflag now only indicates "AMCS CAL" when an AMCS calibration is occurring.
Overview
This data set (ATL02) contains science unit-converted, time-ordered telemetry data, calibrated for instrument effects, downlinked from the Advanced Topographic Laser Altimeter System (ATLAS) instrument on board the Ice, Cloud and land Elevation Satellite-2 (ICESat-2) observatory. The data are used by the ATLAS/ICESat-2 Science Investigator-led Processing System (SIPS) for system–level, quality control analysis and as source data for ATLAS/ICESat-2 Level-2 products and the Precision Orbit Determination (POD) and Precision Pointing Determination (PPD) computations.
Parameter(s):
ENGINEERING TELEMETRY ANCILLARY DATA
Platform(s):
ICESat-2
Sensor(s):
ATLAS
Data Format(s):
HDF5
Temporal Coverage:
13 October 2018 to 11 March 2020
Temporal Resolution:
- Not applicable
Spatial Resolution:
- not applicable
- not applicable
Spatial Reference System(s):
WGS 84
EPSG:4326
Spatial Coverage:
N:
90
S:
-90
E:
180
W:
-180
Blue outlined yellow areas on the map below indicate the spatial coverage for this data set.
Data Access & Tools
This data set has been retired. There is a more recent version of these data.
Documentation
User Guide
ATBDs
General Resources
Product Specification Documents
Help Articles
General Questions & FAQs
This article covers frequently asked questions about the NASA NSIDC DAAC's Earthdata cloud migration project and what it means to data users.
This short article describes the customization services available for ICESat-2 data using Earthdata Search.
How to Articles
Many NSIDC DAAC data sets can be accessed using the NSIDC DAAC's Data Access Tool. This tool provides the ability to search and filter data with spatial and temporal constraints using a map-based interface.Users have the option to
To convert HDF5 files into binary format you will need to use the h5dump utility, which is part of the HDF5 distribution available from the HDF Group. How you install HDF5 depends on your operating system.
This guide will provide an overview of the altimetry measurements and data sets across the missions, as well as a guide for accessing the data through NASA Earthdata Search and programmatically using an Application Programming Interface (API).
The NASA Earthdata Cloud is the NASA cloud-based archive of Earth observations. It is hosted by Amazon Web Services (AWS). Learn how to find and access NSIDC DAAC data directly in the cloud.
All data from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) can be accessed directly from our HTTPS file system, using wget or curl. Basic command line instructions are provided in the article below.
NASA Earthdata Search is a map-based interface where a user can search for Earth science data, filter results based on spatial and temporal constraints, and order data with customizations including re-formatting, re-projecting, and spatial and parameter subsetting.
This webinar introduces the ICESat-2 mission and shows you how to explore, access and customize ICESat-2 data with the OpenAltimetry application, using NSIDC DAAC tools, and shows you how to subset, reformat and analyze the data using Python.