How do I download VIIRS DNB data?

How do I download VIIRS DNB data?

To download VIIRS NRT data, register for an Earthdata Login….Visible Infrared Imaging Radiometer Suite (VIIRS)

1. Download VIIRS-Land data directly at: VIIRS-Land-NRT1.
2. Instructions for scripted/automatic downloads.
3. Subscribe/Unsubscribe LANCE-MODIS/ VIIRS mailing list. Leave subject and body blank.

What does VIIRS measure?

What is VIIRS? The Visible Infrared Imaging Radiometer Suite (VIIRS) instrument collects visible and infrared imagery and global observations of land, atmosphere, cryosphere and oceans.

What is VIIRS on a fire map?

The VIIRS thermal activity layer can be used to visualize and assess wildfires worldwide. VIIRS is a scanning radiometer device aboard the Suomi NPP and NOAA-20 satellites that collects imagery and radiometric measurements of the land, atmosphere, cryosphere, and oceans in several visible and infrared bands.

What is the spatial resolution of VIIRS?

The VIIRS instrument provides 22 spectral bands from 412 nanometers (nm) to 12 micrometers (µm) at two spatial resolutions, 375 meters (m) and 750 m, which are resampled to 500 m, 1 km, and 0.05 degrees in the NASA produced data products to promote consistency with the MODIS heritage.

What is Viirs light pollution?

Light pollution in urban centers creates a sky glow that can blot out the stars. The brighter the area in this zoomable map, the harder it is to see stars and constellations in the night sky. In the United States, national parks are often a refuge for darkness; national parks are shown in purple in the map below.

What is night time light data?

VIIRS Day/Night Band (DNB) data are used for estimating population, assessing electrification of remote areas, monitoring disasters and conflict, and understanding biological impacts of increased light pollution.

What VIIRS 2020?

The Visible Infrared Imaging Radiometer Suite (VIIRS) is a sensor designed and manufactured by the Raytheon Company on board the polar-orbiting Suomi National Polar-orbiting Partnership (Suomi NPP) and NOAA-20 weather satellite.

What is VIIRS light pollution?

What are VIIRS fire alerts?

The Visible Infrared Imaging Radiometer Suite (VIIRS) 375 m thermal anomalies / active fire product provides data from the VIIRS sensor aboard the joint NASA/NOAA Suomi National Polar-orbiting Partnership (Suomi NPP) and NOAA-20 satellites.

How accurate is VIIRS?

The MODIS thermal band detects hot spots with a resolution of 1,000 meters per pixel; VIIRS detects hot spots at a resolution of 375 meters per pixel. In other words, VIIRS makes fire observations that are about three times more detailed than MODIS.

What are the 4 types of light pollution?

Light pollution is caused by inefficient or unnecessary use of artificial light. Specific categories of light pollution include light trespass, over-illumination, glare, light clutter, and skyglow. A single offending light source often falls into more than one of these categories.

What are the types of light pollution?

There are three other kinds of light pollution: glare, clutter, and light trespass.

Where does the VIIRS 375 m active fire data come from?

The Visible Infrared Imaging Radiometer Suite (VIIRS) 375 m ( VNP14IMGTDL_NRT) active fire product is the latest product to be added to FIRMS. It provides data from the VIIRS sensor aboard the joint NASA/NOAA Suomi National Polar-orbiting Partnership (Suomi NPP) satellite.

What is the date of acquisition of VIIRS?

Date of VIIRS acquisition. Time of acquisition/overpass of the satellite (in UTC). This value is based on a collection of intermediate algorithm quantities used in the detection process. It is intended to help users gauge the quality of individual hotspot/fire pixels.

How many VIIRS channels are needed for fire detection?

The algorithm uses all five 375 m VIIRS channels to detect fires and separate land, water, and cloud pixels in the image. Additional 750 m channels complement the available VIIRS multispectral data.

How many bands are there in the VIIRS detector?

VIIRS has 5 high resolution Imagery channels (I-bands), 16 moderate resolution channels (M-bands) and a Day/Night Band (DNB). The VIIRS detectors have a constant angular resolution that results in an increasing pixel footprint size as the scan is further from nadir (see figure 1 below).