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V1.0
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Feb 2004 - May 2005
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This version utilized various versions of FTS retrieved pressure and temperature (p, T) profiles, e.g. versions 1, 2.0, 2.1, 2.2.
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V1.1
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Feb 2004 - Feb 2006
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This data set was produced uniformly based on V2.2 of FTS pressure and temperature (p, T) profiles. Users are encouraged to use V1.2 instead.
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V1.2
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Feb 2004 - Aug 2011
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This data product is based on uniform V2.2 of FTS retrieved pressure and temperature (p, T) profiles.
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V3.12 beta
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Feb 2004 - Sep 2010
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This version determines the MAESTRO and FTS time difference for each occultation measurement by searching the best fit of MAESTRO \(O_2\) A- or B- band slant column amounts to the air mass slant column amounts derived from the FTS V3.0 pressure and temperature (p, T) data. The sunrise and sunset were treated separately and adopted different values for the \(O_2\) to air column scaling factor.
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V3.12.1
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Feb 2004 - Oct 2012
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This version is a slight modification of V3.12 beta. It uses FTS V3.5 pressure and temperature (p, T) data as the input background atmosphere instead of FTS V3.0.
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V3.12.1a
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Feb 2004 - Mar 2013
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This version of MAESTRO data are essentially the continuation of V3.12.1 data. The data from this version are produced based on the FTS V3.6 pressure and temperature (p, T) data.
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V3.13
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Feb 2004 - Feb 2021
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This version is an improved version of V3.12/V 3.12.1 for the Visible-NIR (later referred to as Visible) data products. An improved algorithm for calculating reference spectra and spectral standard errors from high-sun spectra was implemented in V3.13.
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V4.0
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Feb 2004 - Dec 2023
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This version replaces the Chahine relaxation technique with a Twomey-Tikonov inversion algorithm in order to invert the slant column densities into VMR profiles, and incorporates improved Rayleigh scattering modeling and an improved algorithm for high-sun reference spectrum calculation. The data for this version are produced based on the FTS V4.1/4.2 pressure and temperature (p, T) data.
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V4.3
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Feb 2004 - Apr 2024
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This version is an improved version of the V4.0 data products. Improvements in the algorithm lead to better constraints of the retrieval.
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V4.5
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Feb 2004 - present
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This version is an improved version of the V4.0 data products. Improvements in the algorithm lead to better constraints in the retrieval, and a better smoothing function removed discontinuities in the data. The data for this version are produced based on the FTS V5.2 pressure and temperature (p, T) data.
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