The VNP03MODLL geolocation product over the western US from August 20, 2018.
View full-size imageThe Visible Infrared Imaging Radiometer Suite (VIIRS) Moderate Resolution Terrain Correction Geolocation (VNP03MODLL) Version 1 product from the 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.
| Characteristic | Description |
|---|---|
| Collection | Suomi NPP VIIRS |
| DOI | 10.5067/VIIRS/VNP03MODLL.001 |
| File Size | ~1 MB |
| Temporal Resolution | < Daily |
| Temporal Extent | 2012-01-19 to Present |
| Spatial Extent | Global |
| Coordinate System | None (Swath) |
| Datum | N/A |
| File Format | HDF-EOS5 |
| Geographic Dimensions | 3060 km x 3060 km |
| Characteristic | Description |
|---|---|
| Number of Science Dataset (SDS) Layers | 3 |
| Columns/Rows | 3200 x 3200 |
| Pixel Size | 750 m |
| 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.
For complete information about known issues please refer to the MODIS/VIIRS Land Quality Assessment website.