VIIRS/NPP Moderate Resolution Terrain Corrected Geolocation 6-Min L1 Swath 750 m Light

PI: NASA Suomi NPP Science Team

Historic reprocessing is underway for VIIRS Version 2 (Collection 2) data products. Due to Version 2 reprocessing of the historical time series, latency for VIIRS Version 1 data products has varied.


The Visible Infrared Imaging Radiometer Suite (VIIRS) Moderate Resolution Terrain Correction Geolocation (VNP03MODLL) Version 1 product from the NASA/NOAA Suomi National Polar-orbiting Partnership (Suomi NPP) 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. VNP03MODLL 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 VNP03MODLL product are layers for height, latitude, and longitude.

These Science Data Sets (SDS) layers are used in conjunction with the VNP14 swath product for accurate geolocation information.

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Collection and Granule


Characteristic Description
CollectionSuomi NPP VIIRS
File Size~1 MB
Temporal Resolution< Daily
Temporal Extent2012-01-19 to Present
Spatial ExtentGlobal
Coordinate SystemNone (Swath)
File FormatHDF-EOS5
Geographic Dimensions3060 km x 3060 km


Characteristic Description
Number of Science Dataset (SDS) Layers3
Columns/Rows3200 x 3200
Pixel Size750 m

Layers / Variables

SDS Name Description Units Data Type Fill Value No Data Value Valid Range Scale Factor
Height Terrain height at pixel locations Meters 32-bit floating point N/A N/A N/A N/A
Latitude Latitudes of pixel locations Degree 32-bit floating point N/A N/A N/A N/A
Longitude Longitude of pixel locations Degree 32-bit floating point N/A N/A N/A N/A

¹VNP03MODLL contains height, latitude and longitude SDS layers to be used in conjunction with the VNP14 swath product for accurate geolocation information. The future VNP03 product will include the full suite of SDS layers including the satellite and solar angles.

Known Issues

For complete information about known issues please refer to the MODIS/VIIRS Land Quality Assessment website.

About the image

The VNP03MODLL geolocation product over the western US from August 20, 2018.

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User Guide
Algorithm Theoretical Basis Document (ATBD)

Using the Data

Access Data


DOI: 10.5067/VIIRS/VNP03MODLL.001