The Soil Moisture Operational Products System (SMOPS) combines soil moisture retrievals from multiple satellite sensors to provide a global soil moisture map with high spatial coverage. SMOPS provides a seamless soil moisture map over global land from six satellites, including GPM, SMAP, GCOM-W1, SMOS, Metop-A, and Metop-B. The global soil moisture maps are generated in daily intervals with the most recent 24 hours of soil moisture from multiple retrieval algorithms, and mapped with a cylindrical projection on 0.25 x 0.25 degree grid.

The GOME-2 total ozone retrieval algorithm (Level 2) is based on OMI/TOMS (Ozone Monitoring Instrument / Total Ozone Mapping Spectrometer) V8 algorithm, which is a three-step process of successive estimation improvement. The algorithm uses a pair of wavelengths 331nm and 318nm (340nm and 331nm for high solar zenith angle) to derive total ozone and surface reflectivity. It first calculates N-value at the pair of wavelengths using input radiance/irradiance from GOME-2 level 1b data.

The GOME-2 total ozone retrieval algorithm is based on OMI/TOMS (Ozone Monitoring Instrument / Total Ozone Mapping Spectrometer) V8 algorithm, which is a three-step process of successive estimation improvement. The algorithm uses a pair of wavelengths 331nm and 318nm (340nm and 331nm for high solar zenith angle) to derive total ozone and surface reflectivity. It first calculates N-value at the pair of wavelengths using input radiance/irradiance from GOME-2 level 1b data.

The Global Ozone Monitoring Experiment-2 (GOME-2) is a nadir-viewing, medium-resolution double UV-VIS spectrometer onboard the European MetOp satellite series. GOME-2 measures ozone profiles, total columns of ozone, and other atmospheric constituents that are related to the depletion of ozone. The instruments four main channels provide continuous spectral coverage of wavelengths between 240 and 790 nm with a spectral resolution between 0.25 nm and 0.5 nm.

The Microwave Integrated Retrieval System (MIRS) provides an end-to-end capability of calibrating and characterizing the radiances measured from satellite-based microwave instruments using state of the art algorithm science. The MIRS produces advanced near-real-time operational sounding products in all-weather and over all-surface conditions using brightness temperatures from multiple microwave instruments. The MIRS Global Level-3 (L3) daily sounding map provides temperature, water vapor, and hydrometeor profiles maps.

The Microwave Integrated Retrieval System (MIRS) provides an end-to-end capability of calibrating and characterizing the radiances measured from satellite-based microwave instruments using state of the art algorithm science. The MIRS produces advanced near-real-time operational surface and precipitation products in all-weather and over all-surface conditions using brightness temperatures from multiple microwave instruments.

GCOM-W Advanced Microwave Scanning Radiometer 2 (AMSR2) Level 2 Products (AMSR2_L2) - The GCOM-W project is a 13-year mission with a series of three satellites that aims to measure global-scale water-cycle changes over a long period of time. GCOM-W1 is the first satellite in the GCOM-W series and was launched in May 2012 by the Japan Aerospace Exploration Agency (JAXA).

The Advanced Microwave Scanning Radiometer 2 (AMSR2) was launched on 18 May 2012, onboard the Global Change Observation Mission - Water (GCOM-W) satellite developed by the Japan Aerospace Exploration Agency (JAXA). The GCOM-W mission aims to establish the global and long-term observation system to collect data, which is needed to understand mechanisms of climate and water cycle variations, and demonstrate its utilization.

The Global navigation satellite system Receiver for Atmospheric Sounding (GRAS) is a radio occultation receiver onboard the European MetOp satellite series. GRAS uses radio occultation to measure vertical profiles of atmospheric temperature and humidity by tracking signals received from a constellation of GNSS satellites. As radio waves pass through the atmosphere, they are refracted along the atmospheric path. The degree of refraction depends on gradients of air density, which in turn depend on temperature and water vapor.

The GOME-2 total ozone retrieval algorithm is based on OMI/TOMS (Ozone Monitoring Instrument / Total Ozone Mapping Spectrometer) V8 algorithm, which is a three-step process of successive estimation improvement. The algorithm uses a pair of wavelengths 331nm and 318nm (340nm and 331nm for high solar zenith angle) to derive total ozone and surface reflectivity. It first calculates N-value at the pair of wavelengths using input radiance/irradiance from GOME-2 level 1b data.