GOSAT-GW is the third satellite in the GOSAT Series for observations of greenhouse gases, and it is planned to be launched in 2024 fiscal year.
GOSAT-GW challenges to observe CO2 and methane, as well as air pollutant nitrogen dioxide (NO2) from space.
We develop the data processing system to derive NO2 concentration with high accuracy and high speed.
High-accuracy
and
high-speed data processing
GOSAT-GW is equipped with a diffraction grating spectrometer, unlike GOSAT-1 and GOSAT-2, so that it can observe like "plane" instead of "point" as shown in Figs 1 and 2. It observes approximately 3 million points per day, enabling more detailed monitoring of where and how much greenhouse gases and air pollutants are being emitted. The data processing system needs to be faster due to the large number of observation points, and in the case of GOSAT-GW, each observation point must be processed within about 0.03 seconds.
Collaboration
of
three national research institutes
We are developing a data processing system to derive NO2 concentration data (GOSAT-GW NO2 Data Processing System: GNDPS) under a joint research agreement with the Japan Agency for Marine-Earth Science and Technology, led by the National Institute for Environmental Studies. Among them, NICT is responsible for deriving the aerosol characteristics and air mass factor (AMF*), which are the key to obtaining NO2 concentration data and have high computational costs.
*Air mass factor (AMF): The value when the optical path length of the observation light is normalized by setting the optical path length when the light reaches the ground surface perpendicularly from the top of the atmosphere to 1.
NEWS:
2024 planned to be launched
GOSAT-GWミッションHP:
国立環境研究所
