Third International Radiative Transfer Modeling Workshop (IRTMW01)


This workshop series was started in 1999. Its main objective is to enhance information exchange and collaboration regarding radiative transfer modeling in the mm and sub-mm frequency ranges. The discussions and experiences of the two first workshops have resulted in a community radiative transfer model, with the power and flexibility to be used in a wide range of applications.

The first workshop was held in April 1999 at 'Haus Bredbeck', a small facility in the countryside near Bremen. The main topics were to compare and discuss existing forward models for the simulation of atmospheric observations in the radio (microwaves to sub-mm) range. All relevant design parameters of the new radiative transfer program ARTS (Atmospheric Radiative Transfer Simulator) were discussed and fixed. The second workshop was held at the same place in June 2000. A special point during that second workshop was the first presentation of ARTS.

This October we plan to organize the third edition of the workshop where the main topic will be an intercomparison of forward models. The comparison is open for all workshop participants and it will consider ground-based, nadir looking and limb sounding observations. For example, ARTS and the JEM/SMILES Simulator, developed recently in Japan, will participate in the intercomparison.


Lehmkuhlenbusch 4
27753 Delmenhorst, Germany


October 10 - October 11 2001


Dr. Stefan Buehler
University of Bremen
Institute of Environmental Physics
P.O. Box 330440
D-28334 Bremen
eMail: sbuehler (at)
  Dr. Patrick Eriksson
Department of Radio and Space Science
Chalmers University of Technology
Göteborg, Sweden.

eMail: patrick (at)

Organization Committee

Manager:  Carmen Verdes  University of Bremen
Institute of Environmental Physics
P.O. Box 330440
D-28334 Bremen
eMail: cverdes (at)
Phone: +49 (0)421 2184657
Fax: +49 (0)421 2184555

Workshop contact point

Carmen Verdes <cverdes (at)>

Sponsored by

IUP University of Bremen - Institute of Environmental Physics
NASDA German Aerospace Center
NASDA Hanse-Wissenschaftskolleg


The HWK has made a special arrangement with

Hotel am Stadtpark
An den Graften 1-3
27753 Delmenhorst, Germany
Website / Map

  • In general each participant has to book and pay the hotel room himself/herself.
    Please state that you are a participant of the IRTMW01 workshop at HWK because you will pay then a reduced price.
  • Please make the reservation as soon as possible since the pre-reservation of the hotel rooms ends 14 days before the symposium starts.
  • For the participants the transport between the Hotel am Stadtpark and the HWK is organized with taxi-cabs.
  • In case of questions or problems please contact
    Mrs. Kozak
    Institute of Environmental Physics, P.O. Box 330440, D-28334 Bremen, Germany
    Phone: +49 421 218 4812
    Fax: +49 421 218 4555
    Email: kozak (at)


Travel information can be found here


All scientists who's working interest lies in the field of radiative transfer modeling are invited to join the workshop and to actively participate. To allow real group work and efficient discussions, the number of participants is limited to 30. Places will be reserved on a first-come-first-served basis.

If you have not received a registration form by mail, you can download it here.

Travel information could be found here


Thanks to the sponsors of the workshop, the participation, including lunches and workshop dinner, will be free of charge. Travel and accommodation expenses have to be covered by the participants.


Timetables for the workshop

The preliminary timetabes for Wednesday (10.10.01) and Thursday (11.10.01) (status: 13 September 2001) are available in the following formats:

Introduction / Invitation


The workshop will to a large extend consist of group work and discussions, with only few presentations. A description of the test cases for the model intercomparison, and the corresponding inputs can be found here.

Participants will be asked to submit their forward model results before the workshop to have the comparison ready at the start of the workshop. If models can run on portable computers, bringing the models themselves would also be a good idea, to allow further comparisons during the workshop with the aim of characterizing the source to discrepancies between the models.

Participants are invited to bring their results for the test cases. If models can run on portable computers, bringing the models themselves would also be a good idea.

Instead of publishing proceedings in book form, like for the last two workshops, we this time aim to summarize the intercomparison results in a journal paper, for example in JQSRT.