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Spacecraft payload for low-orbit constellations for CO2 and CH4 remote sensingстатья
- Авторы: Mansurov O.G., Ginzburg V.A., Zelenova M.S., Monakhov D.O., Rodin A.V., Uvarov
- Сборник: 72nd International Astronautical Congress (IAC)
- Серия: International Astronautical Federation (IAF)
- Год издания: 2021
- Место издания: IAC-21 Dubai, United Arab Emirates, 25-29 October 2021
- Первая страница: 10
- Последняя страница: 20
- Номер статьи: B1,IP,14,x65930
- Аннотация: Spaceborne greenhouse gases` (GHG) observation systems are under intense development in the US, Japan, China, Europe and other space powers. In Russia, however, there were little results concerning GHG monitoring from the orbit. Limited datasets have been derived from METEOR-M №2 satellites, some technology demonstration experiments have been accomplished in last decade. In this work we present a concept of the GHG monitoring system based on a constellation of small-sized satellites. The system implies a combination of a compact Fourier transform spectrometer (FTIRS) with a moderate spectral resolution ( ~ 10 000) covering a mid-to-longwave infrared spectral range, with a novel multichannel laser heterodyne spectrometer (MLHS) characterized with an unprecedented spectral resolution as high as ~ 107 in the near-IR range. A compact and robust design of both instruments allows for the use of a lightweight (below 50 kg) satellite platform which may be commercially produced and deployed on the LEO after successful demonstration mission, or on a third-party demand.As GHG monitoring requires high accuracy in the vertical profiling and column abundance retrievals. This in turn invokes advanced data treatment techniques, including highly accurate radiative transfer modeling, robust solution to the inverse problems based, comprehensive calibration and validation of the instrumental data. We employ accurate line-by-line simulations with a new implementation of the discrete ordinate method, which results in significant advancement in computing performance. For inverse problems, including GHG vertical profiling and horizontal discrimination in the limb observation geometry, we employ a classic Tikhonov regularization based on residual method, which allows retrievals of distribution along the line of sight for a GHG of interest by analyzing contribution of different parts of spectral line profile in the net absorption.A demonstration flight of spaceborne FTIRS + MLHS is planned by the end of 2022 onboard 18U “Diana” CubeSat.
- Добавил в систему: Гинзбург Вероника Александровна