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Description

The Visible Infrared Imaging Radiometer Suite (VIIRS) Moderate Resolution Terrain Correction Geolocation (VJ103MODLL) Version 2.1 product from the NOAA-20 VIIRS sensor is produced in 6 minute temporal satellite increments (swaths) at 750 meter resolution. Intersecting the VIIRS line of sight vector with Earth’s geoid and the World Geodetic System (WGS) ellipsoid, this product is based on the SRTM30 Version 2 digital elevation model (DEM), which uses GTOPO30 data for areas from 60° North to 60° South. VJ103MODLL is a terrain correction geolocation product that provides the spatial location for various VIIRS data products. Each swath of data is approximately 3,060 kilometers along track (long) and 3,060 kilometers across track (wide).

Provided in the VJ103MODLL product are layers for height, latitude, and longitude.

These Science Data Sets (SDS) layers are used in conjunction with the (VJ114) swath product for accurate geolocation information.

Known Issues

Version Description

NOAA-20 (JPSS-1) VIIRS data products, designated as "VJ1", were introduced in VIIRS Version 2.

Product Summary

Platforms
NOAA-20
Instruments
VIIRS
Spatial Extent

N: 90 S: -90 E: 180 W: -180

Spatial Resolution
750 Meters x 750 Meters
Spatial Reference System(s)
VIIRS Sinusoidal Tiling System
Location
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
GEODETIC
Temporal Extent
2018-01-01 to Present
Temporal Resolution
1 Day
Data Partner
Land Processes Distributed Active Archive Center (LP DAAC) ,
Land Science Investigator-led Processing System, Terrestrial Information Systems Laboratory, Earth Sciences Division, Sciences and Exploration Directorate, Goddard Space Flight Center, NASA (NASA/GSFC/SED/ESD/TISL/LandSIPS)
Concept ID
C2545314612-LPCLOUD
Data State
ACTIVE
Number of Files/Granules
709659
Processing Level
1A
Published
Updated
Science Keywords
Geolocation

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Lin, G. (2023). VIIRS/JPSS1 Moderate Resolution Terrain Corrected Geolocation 6-Min L1 Swath 750m Light V021 [Data set]. NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/VIIRS/VJ103MODLL.021 Date Accessed: 2026-02-22

File Naming Convention

VJ103MODLL.A2025225.0142.021.2025225070805.h5

The file name begins with the Product Short Name (VJ103MODLL) followed by the Julian Date of Acquisition formatted as AYYYYDDD (A2025225), the Hours and Minutes of Acquisition provided as HHMM (0142), the Version of the data collection (021), the Julian Date and Time of Production designated as YYYYDDDHHMMSS (2025225070805), and the Data Format (h5).

Documents

Variables

The table below lists the variables contained within a single granule for this dataset. Variables often contain observed or derived geophysical measurements collected from a variety of sources, including remote sensing instruments on satellite and airborne platforms, field campaigns, in situ measurements, and model outputs. The terms variable, parameter, scientific data set, layer, and band have been used across NASA’s Earth science disciplines; however, variable is the designated nomenclature in NASA’s Common Metadata Repository (CMR). Variable metadata attributes such as Name, Description, Units, Data Type, Fill Value, Valid Range, and Scale Factor allow users to efficiently process and analyze the data. The full range of attributes may not be applicable to all variables. Additional information on variable attributes is typically available in the data, user guide, and/or other product documentation.

For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor
Height Terrain height at pixel locations Meters float32 N/A N/A N/A
Latitude Latitudes of pixel locations Degree float32 N/A N/A N/A
Longitude Longitude of pixel locations Degree float32 N/A N/A N/A
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