TRMM Attitude and VIRS Packets and Header Record L1A V7 (TRMM_1A01) at GES DISC
The Level-1A Product file, "1A01", is a concatenation of Header record, Spacecraft Attitude packets, VIRS Housekeeping Data packets, VIRS Science Data packets, QACs, and an MDUL.
As such, it is reversible to Level 0. The header record contains information pertaining to orbit times, orbit number, times of the first scan, and number of scans, among other things. The Level 0 data contain the actual channel data expressed as "sensor counts". A Level 1A file contains data for a single orbit and has a file size of about 31 MB (uncompressed). There are 16 files of VIRS 1A01 data produced per day.
The Visible and Infrared Scanner (VIRS) is a five-channel visible/infrared radiometer, which builds on the heritage of theAdvanced Very High Resolution Radiometer (AVHRR) instrument flown aboard the NOAA series of Polar-Orbiting Operational EnvironmentalSatellites (POES). The VIRS detects radiation at 1 visible, 2 near infrared and 2 thermal infrared wavelengths, allowing determination of cloud coverage, cloud top height and temperature, and precipitation indices. The central wavelengths for the VIRS channels are 0.63, 1.60,3.75, 10.8, and 12.0 microns. All channels are in operation during the daytime, but only channels 3, 4 and 5 operate during the nighttime.
Spatial coverage is between 38 degrees North and 38 degrees South owing to the 35 degree inclination of the TRMM satellite. This orbit provides extensive coverage in the tropics and allows each location to be covered at a different local time each day, enabling the analysis of the diurnal cycle of precipitation.
Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | public |
| bureauCode |
[
"026:00"
]
|
| contactPoint |
{
"fn": "ANDREY SAVTCHENKO",
"@type": "vcard:Contact",
"hasEmail": "mailto:Andrey.Savtchenko@nasa.gov"
}
|
| description | The Level-1A Product file, "1A01", is a concatenation of Header record, Spacecraft Attitude packets, VIRS Housekeeping Data packets, VIRS Science Data packets, QACs, and an MDUL. As such, it is reversible to Level 0. The header record contains information pertaining to orbit times, orbit number, times of the first scan, and number of scans, among other things. The Level 0 data contain the actual channel data expressed as "sensor counts". A Level 1A file contains data for a single orbit and has a file size of about 31 MB (uncompressed). There are 16 files of VIRS 1A01 data produced per day. The Visible and Infrared Scanner (VIRS) is a five-channel visible/infrared radiometer, which builds on the heritage of theAdvanced Very High Resolution Radiometer (AVHRR) instrument flown aboard the NOAA series of Polar-Orbiting Operational EnvironmentalSatellites (POES). The VIRS detects radiation at 1 visible, 2 near infrared and 2 thermal infrared wavelengths, allowing determination of cloud coverage, cloud top height and temperature, and precipitation indices. The central wavelengths for the VIRS channels are 0.63, 1.60,3.75, 10.8, and 12.0 microns. All channels are in operation during the daytime, but only channels 3, 4 and 5 operate during the nighttime. Spatial coverage is between 38 degrees North and 38 degrees South owing to the 35 degree inclination of the TRMM satellite. This orbit provides extensive coverage in the tropics and allows each location to be covered at a different local time each day, enabling the analysis of the diurnal cycle of precipitation. |
| 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://disc2.gesdisc.eosdis.nasa.gov/data/TRMM_L1A/TRMM_1A01.7"
},
{
"@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/TRMM_1A01_7.html"
},
{
"@type": "dcat:Distribution",
"title": "View documentation related to this dataset",
"format": "PDF",
"mediaType": "application/pdf",
"description": "Comparison between TRMM versions 6 and 7.",
"downloadURL": "https://pps.gsfc.nasa.gov/Documents/formatChangesV7.pdf"
},
{
"@type": "dcat:Distribution",
"title": "View documentation related to this dataset",
"format": "PDF",
"mediaType": "application/pdf",
"description": "File specification document.",
"downloadURL": "https://pps.gsfc.nasa.gov/Documents/filespec.TRMM.V7.pdf"
},
{
"@type": "dcat:Distribution",
"title": "View this dataset's read me document",
"format": "PDF",
"mediaType": "application/pdf",
"description": "README Document",
"downloadURL": "https://disc2.gesdisc.eosdis.nasa.gov/data/TRMM_L1A/TRMM_1A01/doc/README.TRMM_V7.pdf"
},
{
"@type": "dcat:Distribution",
"title": "View documentation related to this dataset",
"format": "HTML",
"mediaType": "text/html",
"description": "TRMM Data Gaps",
"downloadURL": "https://gpmweb2https.pps.eosdis.nasa.gov/tsdis/AB/docs/anomalous.html"
},
{
"@type": "dcat:Distribution",
"title": "The dataset's project home page",
"format": "HTML",
"mediaType": "text/html",
"description": "TRMM Project Home Page",
"downloadURL": "https://trmm.gsfc.nasa.gov/"
},
{
"@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=TRMM_1A01"
},
{
"@type": "dcat:Distribution",
"title": "Get a related visualization",
"format": "PNG",
"mediaType": "image/png",
"downloadURL": "https://docserver.gesdisc.eosdis.nasa.gov/public/project/Images/TRMM_1A01_7.png"
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]
|
| identifier | C1282248315-GES_DISC |
| issued | 1997-12-20 |
| keyword |
[
"earth-science",
"infrared-wavelengths",
"platform-characteristics",
"sensor-characteristics",
"spectral-engineering",
"visible-wavelengths"
]
|
| landingPage | https://cmr.earthdata.nasa.gov:443/search/concepts/C1282248315-GES_DISC.html |
| language |
[
"en-US"
]
|
| modified | 2025-04-01 |
| programCode |
[
"026:001"
]
|
| publisher |
{
"name": "NASA/GSFC/SED/ESD/GCDC/GESDISC",
"@type": "org:Organization"
}
|
| spatial | -180.0 -38.0 180.0 38.0 |
| temporal | 1997-12-20T00:00:00Z/2014-03-21T23:59:59.999Z |
| theme |
[
"TRMM",
"geospatial"
]
|
| title | TRMM Attitude and VIRS Packets and Header Record L1A V7 (TRMM_1A01) at GES DISC |
