VIIRS-NPP luminous remote sensing data download
I. Introduction Data
1.NPP
In the past few years, NASA ran a lot of satellite systems, including the famous EOS system. Now, NASA is building a new satellite system to continue global environmental observing, one of the important satellite system is NPOESS Preparatory Project (referred to as the NPP, but also there are indications that National Polar-orbiting Partnership for short), jointly by the NASA, NOAA and the US Air Force research and development. NPP satellite system 5 comprises a sensor for detecting the Earth's atmosphere and the environment, including land cover, vegetation change. NPP also tracks atmospheric ozone and aerosols, and marine and land surface temperature, addition, ice can be monitored and terrestrial NPP ice. NPP can also monitor volcanic eruptions, forest fires, droughts, floods, storms, hurricanes / typhoons and other natural disasters. In short, NPP can monitor the health of the planet from space, providing long time series data, is mainly responsible for the future of Earth science mission.
NPP on October 28, 2011 launch, in January 2012, there was a renamed. NPP was renamed SUOMI, SUOMI is the father of satellite meteorology United States Verner E. SUOMI name. Therefore, it was also behind the NPP written SNPP.
2.VIIRS
VIIRS (Visible infrared Imaging Radiometer) visible and infrared imaging radiometer. Scanning imaging radiometer, the radiation image may be collected on land, air, sea and ice in the visible and infrared bands. He is the High Resolution Radiometer AVHRR and Earth observation series in expanding and improving the resolution Imaging Spectroradiometer MODIS series. VIIRS data used to measure cloud and aerosol properties, ocean color, marine and land surface temperature, and the temperature of ice sports, fire, earth, and albedo. Meteorologists use VIIRS data to improve our understanding of global temperature change.
Equipped with satellite:
NPP was originally mounted on the satellite becomes NPP / VIIRS or SNPP / VIIRS. Update planned later in 2017, mounted on (the next generation of polar orbiting satellites) JPSS, also called JPSS-1 / VIIRS.
For details, refer to this PPT to learn.
Important parameters:
1) Number of spectral bands: 22 (0.3 ~ 14μm). include:
- Visible light, near infrared 9 (0.4 ~ 0.9μm);
- Short wave infrared 8 (1 ~ 4μm);
- 4 thermal infrared (8 ~ 12μm);
- Visible channel at a low light conditions.
2) Resolution:
nadir spatial resolution 400m; spatial scanning resolution of about 800 - meter band edge; luminous resolution remote sensing products 750m ; once equator. 4 hours have elapsed.
Second, data download
1. Real-time data download
Recommended sites:
https://www.bou.class.noaa.gov/saa/products/search?sub_id=0&datatype_family=VIIRS_SDR&submit.x=27&submit.y=2
After opening web sites like this:
fill in the time required for data and spatial extent; luminous remote sensing data generally choose two data sets:
- VIIRS Day Night Band SDR (SVDNB) (public 02/07/2012) VIIRS Day Night
- Band SDR Ellipsoid Geolocation (GDNBO) (public 02/07/2012）
Select After filling in 'Quick Search & Order', then fill in the mailbox information, the data processing is good, you'll get a message. According to e-mail the instructions to download.
2. The historical annual average of + / monthly average download
Recommended URL:
https://www.ngdc.noaa.gov/eog/viirs/download_dnb_composites.html
After the page opens like this:
turn to the bottom of the page, you will see some folders named by year, opening the year you need, here are monthly data, annual data, continue to point to open, according to the desired area of the latitude and longitude , select the appropriate file to download.
Learning materials on the VIIRS
