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HIRDLS/Aura Level 3 Nitrogen Dioxide (NO2) 1deg Lat Zonal Fourier Coefficients V007 (H3ZFCNO2) at GES DISC

Published by NASA/GSFC/SED/ESD/GCDC/GESDISC | National Aeronautics and Space Administration | Catalog Last Checked: June 23, 2026 at 10:26 PM | Dataset Last Updated: March 31, 2025
The "HIRDLS/Aura Level 3 Nitrogen Dioxide (NO2) Zonal Fourier Coefficients" version 7 data product (H3ZFCNO2) contains the entire mission (~3 years) of HIRDLS data expressed as zonal Fourier coefficients in 1 degree latitude bands from -64 to 80 degrees at 121 pressure levels. The coefficients are computed from the HIRDLS Level 2 profiles with a Kalman filter approach using both forward and backward passes in time. Expressed as the mean and up to 7 sine and cosine coefficients (4 waves for ascending and descending, 7 waves for combined), these coefficients may be used to compute values at any longitude. The data are provided on a pressure grid with 24 levels per decade, corresponding to about 1 km vertical resolution. The useful vertical range of the data is 100 to 5.1 hPa. The precision values are given by the root-mean square of the differences between the estimated fields and the input data. The data are stored in the version 5 Hierarchical Data Format for the Earth Observing System (HDF-EOS5), which is an extension of the HDF5 format. Each file contains a zonal object with data for the entire mission with separate data fields for ascending (daytime), descending (nighttime), and combined orbit node.

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Complete Metadata
@type dcat:Dataset
accessLevel public
bureauCode 
[
  "026:00"
]
contactPoint 
{
  "fn": "JOHN GILLE",
  "@type": "vcard:Contact",
  "hasEmail": "mailto:gille@ucar.edu"
}
description The "HIRDLS/Aura Level 3 Nitrogen Dioxide (NO2) Zonal Fourier Coefficients" version 7 data product (H3ZFCNO2) contains the entire mission (~3 years) of HIRDLS data expressed as zonal Fourier coefficients in 1 degree latitude bands from -64 to 80 degrees at 121 pressure levels. The coefficients are computed from the HIRDLS Level 2 profiles with a Kalman filter approach using both forward and backward passes in time. Expressed as the mean and up to 7 sine and cosine coefficients (4 waves for ascending and descending, 7 waves for combined), these coefficients may be used to compute values at any longitude. The data are provided on a pressure grid with 24 levels per decade, corresponding to about 1 km vertical resolution. The useful vertical range of the data is 100 to 5.1 hPa. The precision values are given by the root-mean square of the differences between the estimated fields and the input data. The data are stored in the version 5 Hierarchical Data Format for the Earth Observing System (HDF-EOS5), which is an extension of the HDF5 format. Each file contains a zonal object with data for the entire mission with separate data fields for ascending (daytime), descending (nighttime), and combined orbit node.
distribution 
[
  {
    "@type": "dcat:Distribution",
    "title": "Download this dataset through a directory map",
    "format": "HTML",
    "mediaType": "text/html",
    "description": "Access the data via HTTPS.",
    "downloadURL": "https://acdisc.gesdisc.eosdis.nasa.gov/data/Aura_HIRDLS_Level3/H3ZFCNO2.007/"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Use OPeNDAP to access the dataset's data",
    "format": "HTML",
    "mediaType": "text/html",
    "description": "Access the data via the OPeNDAP protocol.",
    "downloadURL": "https://acdisc.gesdisc.eosdis.nasa.gov/opendap/HDF-EOS5/Aura_HIRDLS_Level3/H3ZFCNO2.007/HIRDLS-Aura_L3ZFCNO2_v07-00-20-c01_2005d022-2008d077.he5.html"
  },
  {
    "@type": "dcat:Distribution",
    "title": "This dataset's landing page",
    "format": "HTML",
    "mediaType": "text/html",
    "description": "Access the dataset landing page from the GES DISC website.",
    "downloadURL": "https://disc.gsfc.nasa.gov/datacollection/H3ZFCNO2_007.html"
  },
  {
    "@type": "dcat:Distribution",
    "title": "View this dataset's publications",
    "format": "PDF",
    "mediaType": "application/pdf",
    "description": "List of publications.",
    "downloadURL": "https://docserver.gesdisc.eosdis.nasa.gov/repository/Mission/HIRDLS/3.3_Product_Documentation/3.3.6_Product_Application/All_HIRDLS_Papers_26June2013.pdf"
  },
  {
    "@type": "dcat:Distribution",
    "title": "View this dataset's read me document",
    "format": "PDF",
    "mediaType": "application/pdf",
    "description": "README and Data Quality document",
    "downloadURL": "https://docserver.gesdisc.eosdis.nasa.gov/repository/Mission/HIRDLS/3.3_Product_Documentation/3.3.5_Product_Quality/HIRDLS-DQD_V7.pdf"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Google Scholar search results",
    "format": "HTML",
    "mediaType": "text/html",
    "description": "Search results for publications that cite this dataset by its DOI.",
    "downloadURL": "https://scholar.google.com/scholar?q=10.5067%2FAura%2FHIRDLS%2FDATA309"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Download this dataset through Earthdata Search",
    "format": "HTML",
    "mediaType": "text/html",
    "description": "Use the Earthdata Search to find and retrieve data sets across multiple data centers.",
    "downloadURL": "https://search.earthdata.nasa.gov/search?q=H3ZFCNO2_007"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Get a related visualization",
    "format": "PNG",
    "mediaType": "image/png",
    "downloadURL": "https://docserver.gesdisc.eosdis.nasa.gov/public/project/Images/H3ZFCNO2_007.png"
  }
]
identifier C1251101003-GES_DISC
issued 2013-05-31
keyword 
[
  "atmosphere",
  "atmospheric-chemistry",
  "earth-science"
]
landingPage https://doi.org/10.5067/Aura/HIRDLS/DATA309
language 
[
  "en-US"
]
modified 2025-03-31
programCode 
[
  "026:001"
]
publisher 
{
  "name": "NASA/GSFC/SED/ESD/GCDC/GESDISC",
  "@type": "org:Organization"
}
spatial -180.0 -64.0 180.0 80.0
temporal 2005-01-22T00:00:00Z/2008-03-17T23:59:59.999Z
theme 
[
  "Aura",
  "geospatial"
]
title HIRDLS/Aura Level 3 Nitrogen Dioxide (NO2) 1deg Lat Zonal Fourier Coefficients V007 (H3ZFCNO2) at GES DISC

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