Summary of the Final Report of Research Results1) Title of the proposed research
Atmospheric corrections for fluorescence signal retrieval using GOSAT/TANSO-FTS products
2) Principal Investigator (PI) and Co-Investigators (Co-Is)
PI:
Dr. Samuele Del Bianco
Co-I:
Dr. Bruno Carli
Dr. Ugo Cortesi
Dr. Marina Mazzoni
Dr. Franco Miglietta
3) PI’s affiliation
Institute for Applied Physics “Nello Carrara” of the Italian National Research Council(IFAC-CNR)
4) Summary of the Final Report of Research Results
Objective of the “Fluorescence Signal Retrieval” study was the definition, implementation andvalidation of a prototype software system aimed at the atmospheric corrections for the retrieval ofsolar-induced fluorescence and reflectance of vegetation from measurements of top of theatmosphere radiance in the visible and near-infrared spectral regions. The TANSO/GOSAT RA Joint
Research Agreement, which was executed on 08/31/2009, was terminated in April 2013 due to thelack of national funds to support these activities and the relative missions, and to the great efforts
employed in the project ‘Application of KLIMA algorithm to CO2 retrieval from IASI/METOP-Aobservations and comparison with GOSAT/TANSO-FTS products’ in which the research group wasinvolved. In this summary the main research results reached are reported.
A new software named Multi-purpose Atmospheric Radiative Transfer Algorithm (MARTA), wasdeveloped at IFAC-CNR for forward modelling of remote-sensing observations of the planetaryatmospheres. The design, development, implementation and testing of the MARTA radiative transfer
code was one of the tasks of the project CTOTUS, funded by Regione Toscana and coordinated byIFAC-CNR (project web site: http://ctotus.ifac.cnr.it/). As reported in the Revised Work Plan
Document, the objective of the task was to develop and to validate a multi-purpose software forradiative transfer simulations in the Earth’s atmosphere aiming at the generation of synthetic
measurements acquired by remote-sounders using different viewing geometries (nadir, zenith andlimb-sounding from ground-based, airborne and satellite payloads) and with spectral coverage fromthe mm-wave to the near-infrared and visible regions. MARTA code has been implemented and it isable to simulate the atmospheric radiance from the mm-wave to the near-infrared. Also thepolarization effects have been implemented in the code, while the multiple-scattering module has yet
to be included.
The current version of MARTA was used to perform some calculations in order to check the correctconnection between the various modules as well as to test the functionality of the main program. For
example, the code was used for the calculation of vertical transparency in clear sky condition. This
test was carried out over a wide spectral range for the purpose of 'debugging' of the program and, inaddition, to highlight the feature of flexibility relative to the spectral coverage.
We then used MARTA code for the simulation of the spectral radiance measured by some actual
instruments (MARSCHALS on board of Geophysica; REFIR-PAD from stratospheric platforms andat ground level; IASI on board of METOP-A; and TANSO-FTS SWIR and TIR bands) in order toverify the code in various geometries of observation in spectral bands. Some calculated radiances areshown in the following figures.

Radiance simulated with MARTA in a spectral region that covers the wide-band measured by IASI
instrument aboard the METOP-A satellite. The simulation was performed with the instrument to an
altitude of 800 km and with an angle pointing at nadir. In the simulation were not considered theinstrumental effects. The IASI measurements provide information both on the atmosphere and on thesurface. MARTA, in this case, has also simulated the surface contributions in the spectral region ofIASI taking into account the emissivity and the reflectivity effects.

Radiance simulated by MARTA in a spectral region that covers the three SWIR bands measured byTANSO-FTS. In this simulation the instrumental effects have not been included.
5) List of publications relating to the proposed research
N/A.