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Retrieval of Atmospheric Temperature from Airborne Microwave Radiometer Observations

Xu, Jian and Schreier, Franz and Kenntner, Mareike and Fix, Andreas and Trautmann, Thomas (2015) Retrieval of Atmospheric Temperature from Airborne Microwave Radiometer Observations. In: Proceedings of ATMOS 2015, 735, pp. 1-4. ESA. ATMOS 2015, 8 -12 June 2015, Heraklion, Crete, Greece.

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Official URL: http://seom.esa.int/atmos2015/files/Abstract_Book_ATMOS2015_final_5.pdf

Abstract

Atmospheric temperature is a key geophysical parameter associated with fields such as meteorology,climatology, or photochemistry. There exist several techniques to measure temperature profiles. In the case of microwave remote sensing, the vertical temperature profile can be estimated from thermal emission lines of molecular oxygen. The MTP (Microwave Temperature Profiler) instrument is an airborne radiometer developed at the Jet Propulsion Laboratory (JPL), United States. The instrument passively measures natural thermal emission from oxygen lines at 3 frequencies and at a selection of 10viewing angles (from near zenith to near nadir). MTP has participated in hundreds of flights, including on DLR's Falcon and HALO aircraft. These flights have provided data of the vertical temperature distribution from the troposphere to the lower stratosphere with a good temporal and spatial resolution. In this work, we present temperature retrievals based on the Tikhonov regularized nonlinear leastsquares fitting method. In particular, Jacobians (i.e. temperature derivatives) are evaluated by means of automatic differentiation. The retrieval performance from the MTP measurements is analyzed by using synthetic and real data. Besides, the vertical sensitivity of the temperature retrieval is studied by weighting functions characterizing the sensitivity of the transmission at different frequencies with respect to changes of altitude levels.

Item URL in elib:https://elib.dlr.de/97248/
Document Type:Conference or Workshop Item (Poster)
Title:Retrieval of Atmospheric Temperature from Airborne Microwave Radiometer Observations
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Xu, Jianjian.xu (at) dlr.deUNSPECIFIED
Schreier, Franzfranz.schreier (at) dlr.deUNSPECIFIED
Kenntner, Mareikemareike.kenntner (at) dlr.deUNSPECIFIED
Fix, Andreasandreas.fix (at) dlr.deUNSPECIFIED
Trautmann, Thomasthomas.trautmann (at) dlr.deUNSPECIFIED
Date:June 2015
Journal or Publication Title:Proceedings of ATMOS 2015
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:735
Page Range:pp. 1-4
Editors:
EditorsEmail
UNSPECIFIEDESA
Publisher:ESA
Series Name:SP
Status:Published
Keywords:Atmospheric remote sensing Molecular spectroscopy Line-by-line Microwave HALO
Event Title:ATMOS 2015
Event Location:Heraklion, Crete, Greece
Event Type:international Conference
Event Dates:8 -12 June 2015
Organizer:ESA
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Spektrometrische Verfahren und Konzepte der Fernerkundung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Atmospheric Processors
Institute of Atmospheric Physics
Deposited By: Schreier, Dr.rer.nat. Franz
Deposited On:16 Jul 2015 11:25
Last Modified:31 Jul 2019 19:54

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