Space Weather Euro News Vol.6 Issue 2 (17-01-2002)

Table of Contents: 
1. Documents from the Final Presentation of the ESA Space Weather Programme Study
2. Ionosphere and Doris
3. Session on Space Weather Effects on Space Systems at URSI-GA - Dead-line: 22 January.
4. Some ESA Tender Actions from ESA EMITS 

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1. Documents from the Final Presentation of the ESA Space Weather Programme Study
From: A. Hilgers 

The final presentations of the ESA space weather studies by the ALCATEL and RAL 
consortia took place on 6 and 7 December 2001 at ESTEC, Noordwijk, The Netherlands.
The consortia's presentations were followed by a series of presentations of ESA related 

For the last 18 months, ALCATEL and RAL have been performing parallel studies of a 
possible future ESA space weather programme
. These studies were funded by the 
Agency's General Studies Programme. The studies have analysed user requirements and 
prepared analyses of space segment options and the ground-based "service segment".
This work has also been supported by an external Space Weather Working Team and 
by a study with the ESA Concurrent Design Facility (CDF).

A copy of the slides presented at the final presentation and delivered to ESA are now
available from the web site

The main purpose of these final presentations was to perform a thorough review of the
contractors' work. The content of these documents do not represent ESA approved 
procedure or standard and is the responsibily of their author only.

All the ESA approved final reports will also be made available on this site in a near future.

2. Ionosphere and Doris
From: Picot Nicolas 

On board Jason-1, Topex/Poseidon and Spot satellites, the essential function of the Doris 
instrument is the precise determination of the satellite position. Another application also
uses the 2 frequencies of this instrument: the determination of the ionospheric contents 
of the atmosphere. Indeed, the radar electromagnetic waves are slowed down during 
their crossing in the atmosphere, this effect being related on the water content, and the 
ionospheric content. It is so compulsory to apply the corrections to take into account 
these physical phenomena in order to obtain the necessary precision to the range
measurement (2 centimetres).

The use of the Doris measurements allows us to compute under the satellite ground-track 
TEC maps that are routinely used in the following frame :

* to correct the Poseidon I single frequency range measurement,
* as validation purposes of the ionospheric correction derived 
 from the dual-frequency radar altimeter measurements,
* as another source of correction in case of failure of the C band,
* as another source of correction in specific areas where the dual-
 frequency correction is not really accurate (coastal, lakes, ice
 Applications, ...),
* and to insure the continuity of the correction whatever the surface
 type is.

For more info on Jason:

3. Session on Space Weather Effects on Space Systems at URSI-GA - 
   Dead-line: 22 January.
From: From: A. Hilgers 

Dear Colleagues,

The abstract submission dead-line for the  URSI General Assembly  in Maastricht, 
The Netherlands, 17 to 24 August 2002 has been extended to 22 January.

You are therefore still welcome to submit an abstract for either oral or poster presentation. 
Please note that two half-day sessions on Space Weather Effects on Space System are 
planned. The full name and overview of these sessions are:


This session will focus on space weather effects (especially electromagnetic) on systems, 
including failures and fault  mitigation. The topic contains spacecraft-plasma interaction, 
 radiation effects on space systems, and geomagnetically induced currents (GIC) and voltages
in ground-based technological systems. Space weather is understood as time varying conditions 
at the Sun,  in the solar wind (including interplanetary scintillation measurements and solar radio
signatures of coronal mass ejections (CME), in the magnetosphere, in the ionosphere (various 
Total  Electron Content (TEC) effects on instruments and Travelling Ionospheric Disturbance 
(TID) issues), in the thermosphere (primarily driven by solar or interplanetary phenomena), and
at the Earth's surface.

Conveners:   G Phil Wilkinson (G, Australia), H Alain Hilgers (H, The Netherlands) 
 and E Risto Pirjola (E,Finland)

NB. Commissions' names are as follows:
Commission E: Electromagnetic Noise and Interference
Commission G: Ionospheric Radio and Propagation
Commission H:     Waves in Plasmas
(cf General info on URSI )

Please find below some additional information about the session and the URSI Assembly and 
feel free to forward this information to your colleagues who might be interested in these sessions.

Please go to:
for full descriptions of all the sessions and details about the Assembly.

To enter abstracts online, please go to:

Note: the deadline for abstract submission has been extended by a week,
to 22nd January.  Anyone who experienced difficulties entering their
abstracts last week will now find that these problems have been overcome.

January 22, 2002        Receipt of on-line abstracts
March 1, 2002   Notification of paper acceptance
April 15, 2002   Full papers for the Conference Proceedings
May 15, 2002   Pre-registration

4. Some ESA Tender Actions from ESA EMITS 

      (From 16/01/2002 to 19/03/2002, Act.Ref.: 01.155.28)

For the complete list of ESA Tender Actions see: 
Note: This newsletter is an initiative of the ESA Space Environments
and Effects Analysis Section
is a prototype mailing list intended to provide a forum for information
posting news of interest to the Space Weather community in Europe.

- SWEN contact group (keeping SWEN informed of news from other channels) 
  is currently:

  Eamonn Daly, ESA (excluding science programme)
  Richard Marsden, ESA science programme
  Maurizio Candidi, CNR
  Paul Cannon, URSI-Commission G
  Mike Hapgood,  EGS
  Hannu Koskinen, SCOSTEP working group on Space weather
  Pierre Lantos, Meudon Observatory
  Henrik Lundstedt, Lund space weather center
  Goetz Paschmann, ISSI
  Jean-Yves Prado, CNES Programme Directorate
  Michael Rycroft, ISU
  Volker Bothmer, EGS-Solar Physics Secretary
  Wolfgang Baumjohann, IWF Graz, Austria  
  Jinbin Cao, Chinese Space Weather Activity Representative
  Barbara Poppe, NOAA Space Environment Centre

- SWEN archives are also available on:    

- Replies and submissions to this newsletter are welcomed and should be 
  sent to:

- To subscribe to the newsletter send your email address

- Please update your e-mail address in the event of a change.
  Please send both your new and old e-mail address to the editor
  to ease updating of your file.

- We look forward to receiving your input.

  SWEN editor:

  Alexi Glover 


  Nadine Hoffmann

  SWEN manager:

  A. Hilgers