English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Abstract. The Japanese Greenhouse gases Observing SATellite-2(GOSAT-2), in orbit since 29 October 2018, follows up the GOSAT mission,itself in orbit since 23 January 2009. GOSAT-2 monitors carbon dioxide andmethane in order to increase our understanding of the global carbon cycle.It simultaneously measures carbon monoxide emitted from fossil fuelcombustion and biomass burning and permits identification of the amount ofcombustion-related carbon. To do this, the satellite utilizes the Thermaland Near Infrared Sensor for Carbon Observation Fourier-TransformSpectrometer-2 (TANSO-FTS-2). This spectrometer detects gas absorption spectraof solar radiation reflected from the Earth's surface in theshortwave-infrared (SWIR) region as well as the emitted thermal infraredradiation (TIR) from the ground and the atmosphere. TANSO-FTS-2 can measurethe oxygen A band (0.76 µm), weak and strong CO2 bands (1.6 and 2.0 µm), weak and strong CH4 bands (1.6 and 2.3 µm), a weak CO band (2.3 µm), a mid-wave TIR band (5.5–8.4 µm), and a long-wave TIR band (8.4–14.3 µm) with 0.2 cm−1 spectralsampling intervals. TANSO-FTS-2 is equipped with a solar diffuser target, amonochromatic light source, and a blackbody for spectral radiancecalibration. These calibration sources permit characterization oftime-dependent instrument changes in orbit. The onboard-recalibratedinstrumental parameters are considered in operational level-1 processing andreleased as TANSO-FTS-2 level-1 version 102102 products, which wereofficially released on 25 May 2020. This paper provides an overview of theTANSO-FTS-2 instrument, the level-1 processing, and the first-year in-orbitperformance. To validate the spectral radiance calibration during the firstyear of operation, the spectral radiance of the version 102102 product iscompared at temporally coincident and spatially collocated points fromFebruary 2019 to March 2020 with TANSO-FTS on GOSAT for SWIR and with AIRSon Aqua and IASI on METOP-B for TIR. The spectral radiances measured byTANSO-FTS and TANSO-FTS-2 agree within 2 % of the averaged bias and 0.5 % standard deviation for SWIR bands. The agreement of brightnesstemperature between TANSO-FTS-2 and AIRS–IASI is better than 1 K in therange from 220 to 320 K. GOSAT-2 not only provides seamless globalCO2 and CH4 observation but also observes local emissions anduptake with an additional CO channel, fully customized sampling patterns,higher signal-to-noise ratios, and wider pointing angles than GOSAT.

atmospheric measurement techniques

Thermal and near-infrared sensor for carbon observation Fourier transform spectrometer-2 (TANSO-FTS-2) on the Greenhouse gases Observing SATellite-2 (GOSAT-2) during its first year in orbit