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TES/Aura L2 HDO Lite Nadir V006

Metadata Updated: December 7, 2023

TL2HDOLN_6 is the Tropospheric Emission Spectrometer (TES)/Aura Level 2 HDO Lite Nadir Version 6 data product. It consists of information for one molecular species for an entire Global Survey or Special Observation. TES Level 2 data contain retrieved species (or temperature) profiles at the observation targets and the estimated errors. The geolocation, quality, and some other data (e.g., surface characteristics for nadir observations) are also provided. L2 modeled spectra are evaluated using radiative transfer modeling algorithms. The process, referred to as retrieval, compares observed spectra to the modeled spectra and iteratively updates the atmospheric parameters. L2 standard product files include information for one molecular species (or temperature) for an entire global survey or special observation run. A global survey consists of a maximum of 16 consecutive orbits. Nadir and limb observations are in separate L2 files, and a single ancillary file is composed of data that are common to both nadir and limb files.

A Nadir sequence with in the TES Global Survey is two low resolution scans over the same ground locations. The Nadir standard product consists of four files, where each file is composed of the Global Survey Nadir observations from one of four focal planes for a single orbit, i.e. 72 orbit sequences. The Global Survey Nadir observations currently only use a single set of filter mix. A Limb sequence within the TES Global Survey is three high-resolution scans over the same limb locations. The Limb standard product will consist of four files, where each file will be composed of the Global Survey Limb observations from one of four focal planes for a single orbit, i.e. 72 orbit sequences. The Global Survey Limb observations use a repeating sequence of filter wheel positions.

Special Observations can only be scheduled during the 9 or 10 orbit gaps in the Global Surveys, and are conducted in any of three basic modes: stare, transect, step-and-stare. The mode used depends on the science requirement. A Global Survey consists of observations along 16 consecutive orbits at the start of a two day cycle, over which 4,608 retrievals are performed (1,152 nadir retrievals and 1,152 retrievals in time ordered sequence for each limb observation). Each observation is the input for retrievals of species Volume Mixing Ratios (VMR), temperature profiles, surface temperature and other data parameters with associated pressure levels, precision, total error, vertical resolution, total column density and other diagnostic quantities.

Each TES Level 2 standard product reports information in a swath format conforming to the HDF-EOS Aura File Format Guidelines. Each Swath object is bounded by the number of observations in a global survey and a predefined set of pressure levels representing slices through the atmosphere. Each standard product can have a variable number of observations depending upon the Global Survey configuration and whether averaging is employed. Also missing or bad retrievals are not reported. Each limb observation Limb 1, Limb 2 and Limb 3, are processed independently. Thus each limb standard product consists of three sets where each set consist of 1,152 observations. For TES, the swath object represents one of these sets. Thus each limb standard product consists of three swath objects, one for each observation, Limb 1, Limb 2, and Limb 3.

The organization of data within the Swath object is based on a superset of the UARS pressure levels used to report concentrations of trace atmospheric gases. The reporting grid is the same pressure grid used for modeling. There are 87 reporting levels from 1211.53 hPa, which allows for very high surface pressure conditions, to 0.1 hPa, about 65 km. In addition, the products will report values directly at the surface when possible or at the observed cloud top level. Thus in the Standard Product files each observation can potentially contain estimates for the concentration of a particu

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Dates

Metadata Created Date November 12, 2020
Metadata Updated Date December 7, 2023

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date December 7, 2023
Publisher NASA/LARC/SD/ASDC
Maintainer
Identifier C1000000361-LARC
Data First Published 2014-07-03
Language en-US
Data Last Modified 2019-06-19
Category TES, geospatial
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Citation 2015-07-16. Archived by National Aeronautics and Space Administration, U.S. Government, NASA/LARC/SD/ASDC. https://doi.org/10.5067/AURA/TES/TL2HDOLN_L2.006. https://asdc.larc.nasa.gov/project/TES.
Harvest Object Id 2df63cf8-e9e4-48dd-979f-b9c56178805e
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL https://doi.org/10.5067/AURA/TES/TL2HDOLN_L2.006
Metadata Type geospatial
Old Spatial -180.0 -90.0 180.0 90.0
Program Code 026:001
Source Datajson Identifier True
Source Hash c34324c74dc2449a9916433dc1808dffc206a989b887493197ddbf544b524ff2
Source Schema Version 1.1
Spatial
Temporal 2004-08-31T00:00:00Z/2015-09-30T23:59:59Z

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