Sequential and Joint Retrieval of Trace Gas Profiles (2002)
Schwarz, Gottfried, Hilgers, Siegfried, Kemnitzer, Holger, Steck, Tilman, Clarmann Von, Thomas, Höpfner, Michael, ...
A purely sequential retrieval of trace gas profiles from limb sounding measurements may lead to error propagation, especially in the case of water vapor retrieval. A joint (i.e. simultaneous)...
Trace Gas Retrieval Including Horizontal Gradients (2002)
Kemnitzer, Holger, Hilgers, Siegfried, Schwarz, Gottfried, Steck, Tilman, Clarmann Von, Thomas, Höpfner, Michael, ...
Der Einfluss horizontaler Gradienten auf das Retrieval von Vertikalprofilen wird demonstriert und analysiert.
Experience Gained with the MIPAS Level 2 Off-Line Processor (2001)
Hilgers, Siegfried, Kemnitzer, Holger, Ressel, Klaus, Schwarz, Gottfried, Steck, Tilman, Clarmann Von, Thomas, ...
Performance tests of the MIPAS level 2 off-line processor led to in-depth experiences with retrieval options and performance characteristics. These depend on various parameters like microwindows,...
Trace Gas Retrieval Including Horizontal Gradients (2000)
Kemnitzer, Holger, Hilgers, Siegfried, Schwarz, Gottfried, Steck, Tilman, Clarmann Von, Thomas, Höpfner, Michael, ...
The results of trace gas retrievals of limb sounding measurements will be affected by a horizontally inhomogeneous atmosphere. In this case, the horizontal gradients should be included in the...
Sequential and Joint Retrieval of Trace Gas Profiles (2000)
Schwarz, Gottfried, Hilgers, Siegfried, Kemnitzer, Holger, Steck, Tilman, Clarmann Von, Thomas, Höpfner, Michael, ...
We demonstrate that a joint (i.e. simultaneous) retrieval of atmospherical trace gases from limb sounding measurements can outperform a purely sequential retrieval of the same trace gases. The reason...
Experience Gained with the MIPAS Level 2 Off-Line Processor (2000)
Hilgers, Siegfried, Kemnitzer, Holger, Ressel, Klaus, Schwarz, Gottfried, Steck, Tilman, Clarmann Von, Thomas, ...
The experience gained with the MIPAS level 2 offline processor will be described. In particular, the layout of the processor will be explained and results for various trace gas retrievals will be...
Manteuffel, T., Ressel, Klaus, Starke, G.
A boundary functional is presented aiming at a least-squares finite element solution of transport problems.
Look-ahead procedures are described for Lanczos- type product methods based on three-term Lanczos recurrences
Experience Gained with the MIPAS Level 2 Off-Line Processor (2000)
Hilgers, Siegfried, Kemnitzer, Holger, Ressel, Klaus, Schwarz, Gottfried, Steck, Tilman
An overview of important results originating from the development of the MIPAS level 2 off-line processor will be given. These results include software design aspects, algorithmic details,...
The MIPAS level 2 off-line processor: Requirements and concepts (1999)
Clarmann Von, Thomas, Stiller, G.P., Friedle, Achim, Ressel, Klaus, Steck, Tilman
The MIPAS level 2 off-line processor: Realization and test results (1999)
Friedle, Achim, Göbel, M., Hilgers, Siegfried, Kemnitzer, Holger, Ressel, Klaus, Schwarz, Gottfried, ...
Development of the ENVISAT Level 2 Off-Line Processor. (1997)
Friedle, Achim, Ressel, Klaus, Schwarz, Gottfried, Slijkhuis, Sander, Steck, Tilman
Development of the ENVISAT MIPAS Level 2 Off-Line Processor (1997)
Friedle, Achim, Ressel, Klaus, Schättler, Birgit, Schwarz, Gottfried, Slijkhuis, Sander, Steck, Tilman
Multilevel Methods for Transport Equations in Diffusive Regimes (1993)
Thomas A. Manteuffel, Klaus Ressel
this paper we try to develop a general framework for finding discretizations for the transport equation that have the correct behavior in the diffusion limit. In Section 2 we describe the discrete...
Multilevel methods for transport equations in diffusive regimes (1993)
Thomas A. Manteuffel, Klaus Ressel
We consider the numerical solution of the single-group, steady state, isotropic transport equation. An analysis by means of the moment equations shows that a discrete ordinates SN discretization in...