TES/Aura L2 Ancillary Product V008

Description

TL2ANC_8 is the Tropospheric Emission Spectrometer (TES)/Aura Level 2 Ancillary Version 8 product . TES Level 2 data contain retrieved species (or temperature) profiles at the observation targets and the estimated errors. TES was an instrument aboard NASA's Aura satellite and was launched from California on July 15, 2004. Data collection for TES is complete. For this product, the geolocation, quality, and other data (e.g., surface characteristics for nadir observations) were also provided. L2 modeled spectra were evaluated using radiative transfer modeling algorithms. The process, referred to as retrieval, compared 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 consisted of a maximum of 16 consecutive orbits. A Nadir sequence within the TES Global Survey was a fixed number of observations within an orbit for a Global Survey. Prior to April 24, 2005, it consisted of two low resolution scans over the same ground locations. After April 24, 2005, Global Survey data consisted of three low resolution scans. The Nadir standard product consisted of four files, where each file was 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 only used a single set of filter mix. A Global Survey consisted of observations along 16 consecutive orbits at the start of a two day cycle, over which 3,200 retrievals were performed. Each observation was 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 reported information in a swath format conforming to the HDF-EOS Aura File Format Guidelines. Each Swath object was 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 could have had a variable number of observations depending upon the Global Survey configuration and whether averaging is employed. Also, missing or bad retrievals were not reported. The organization of data within the Swath object was based on a superset of the UARS pressure levels used to report concentrations of trace atmospheric gases. The reporting grid was the same pressure grid used for modeling. There were 67 reporting levels from 1211.53 hPa, which allowed for very high surface pressure conditions, to 0.1 hPa, about 65 km. In addition, the products reported values directly at the surface when possible or at the observed cloud top level. Thus, in the Standard Product files each observation could have contained estimates for the concentration of a particular molecule at 67 different pressure levels within the atmosphere. However, for most retrieved profiles, the highest pressure levels were not observed due to a surface at lower pressure or cloud obscuration. For pressure levels corresponding to altitudes below the cloud top or surface, where measurements were not possible, a fill value was applied. To minimize the duplication of information between the individual species standard products, data fields common to each species (such as spacecraft coordinates, emissivity, and other data fields) have been collected into a separate standard product, termed the TES L2 Ancillary Data product (ESDT short name: TL2ANC).

Resources

Name Format Description Link
21 Earthdata Search for TL2ANC_8 (NASA Application to search, discover, visualize, refine, and access NASA Earth Observation data) https://search.earthdata.nasa.gov/search/granules?p=C1619005021-LARC
21 TES Publications https://tes.jpl.nasa.gov/science/publications/
21 Report of TES Level 2 Global Survey Products Available from the ASDC https://l0dup05.larc.nasa.gov/public/cgi-bin/DUE/tes_L2GlbSrvy.cgi
33 Aura-TES L2 Products: Version 8 Data Quality Description https://asdc.larc.nasa.gov/documents/tes/quality_summaries/L2_Products_Data_Quality_V008.pdf
33 Earth Observing System (EOS) Tropospheric Emission Spectrometer (TES) Data Validation Report (Version F08_12 data) - Version 8.0 https://asdc.larc.nasa.gov/documents/tes/readme/TES_Validation_Report_v8_Final.pdf
21 ASDC Data and Information for TES https://asdc.larc.nasa.gov/project/TES
21 NASA EOS ATB Documents: TES https://eospso.gsfc.nasa.gov/atbd-category/53
21 How to cite ASDC data https://asdc.larc.nasa.gov/citing-data
21 DOI data set landing page for TL2ANC_8 https://doi.org/10.5067/AURA/TES/TL2ANC.008
45 TES Level 2 Read Software Package - Direct File Download (.tar) https://asdc.larc.nasa.gov/documents/tes/read_software/TES_L2_ReadSoftware.tar
21 TES project home page https://tes.jpl.nasa.gov/
21 Basic IDL Tools for extraction information from TES L2 HDF Product files https://asdc.larc.nasa.gov/documents/tes/readme/README_L2_ReadSoftware.txt
21 OPeNDAP data access for TL2ANC_8 https://opendap.larc.nasa.gov/opendap/TES/TL2ANC.008/contents.html
21 HDFView Overview and Download https://portal.hdfgroup.org/display/HDFVIEW/HDFView
21 ASDC Direct Data Download for TL2ANC_8 https://asdc.larc.nasa.gov/data/TES/TL2ANC.008/
33 TES Level 2 (L2) Data User's Guide (Up to & including Version 8 data) https://asdc.larc.nasa.gov/documents/tes/guide/TESDataUsersGuideV8_0_March_27_2020_FV-8_rh.pdf
33 Aura-TES L2 Products: Version 2 Data Quality Description https://asdc.larc.nasa.gov/documents/tes/quality_summaries/L2_products_v002.pdf
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.5067%2FAURA%2FTES%2FTL2ANC.008

Tags

  • atmospheric-radiation
  • atmosphere
  • atmospheric-temperature
  • atmospheric-pressure
  • earth-science

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