Swedish Institute of Space Physics, Kiruna Division

Plasma and Energetic Electron Environment and Effects Extension S/C Anomaly Analysis

ESTEC/Contract No. 13561/99/NL/SB

Minutes of the Progress Meeting PM2


Held at

Swedish Institute of Space Physics, Kiruna

12-14 October 1999

  1. General status of the project
  2. Lars Eliasson opened the meeting and presented the general status of the project. Work has continued according to the agreed time schedule.

  3. Adoption of Agenda
  4. The agenda was updated and agreed.

  5. Summary of activities since PM1
  6. Peter Wintoft presented the main activities since the last progress meeting.

    Letters to spacecraft operators have been sent and some answers have been received.

    Draft version 2 of the URD of WP110 was delivered to ESTEC 20 August.

    Draft version 1 of the URD of WP210 was delivered to ESTEC 27 August

    Second prototype of WP205 was made accessible to ESTEC in September.

    A meeting at RAL was held in July including valuable discussions with G Reeves.

    Acronyms are slightly changed:

    SAAPS (Satellite Anomaly Analysis and Prediction System)

    with the three modules:

    DB&T (Data Base and Tools)

    SAAM (Satellite Anomaly Analysis Module)

    SAPM (Satellite Anomaly Prediction Module)

  7. Previous action items
  8. The five action items defined at PM1 were discussed. All action items are closed.

    Based on one of the action items confidential information was discussed. We must be careful so that we can guarantee that data received from satellite operators are treated in a way that fulfils their expectations. The technical notes should be written in such a way that we do not disclose sensitive information. A coding system shall be delivered to ESTEC for approval in the end of November 1999.

  9. Prototype satellite anomaly analysis module
  10. Peter Wintoft gave a short introduction to the structure of SAAPS and made a demonstration of the available prototypes.

    It was noted that information on satellite location is important both for anomaly information and environment data.

    The question on data format was discussed again: CDF, system independent JAVA binary or ASCII? Questions that were penetrated in some detail were:

    How much is the performance influenced by using any of these codes?

    Development overhead?

    Performance efficiency?

    Are the codes system independent?



    While JAVA binary offers much more efficiency, ESA is concerned by the stability and survivability of this format and therefore would prefer ASCII. As a compromise, it was decided that in the development of the database Java binary code will be used. However, guidelines to translate from Java binary database to ASCII routines and documentation shall be delivered to ESTEC at the end of the contract.

    Non-uniform time sampling of data was discussed. It can in principle be handled with the present design of the database.

    It was decided that the latest version of Java running at the end of 2000 should be used.

    Comment on the draft 205.

    WP205 is i n principal finished but the comments below on this material will be used in the completion of WP210-220.

    Description of model parameters should appear in appropriate places.

    Y-axis label should be changed so that it is easier to interpret.

    Labels and readability has to be improved.

    Interface for submitting temporary or permanent users data must be included.

    For the superposed epoch analysis: Log scale should be included as option. Standard deviation to get knowledge about the significance of data.

    More types of analysis tools shall be available. Specifically using correlation with other anomaly data sets. Find ways to promote the inclusion of other anomaly data sets.

    MeV proton and X-ray data from GOES can be used as real time monitoring of solar particle events and should be added to the data base.

    Display and determine clustering of anomaly database in geographical and geomagnetic (e.g., B, L, MLT, invariant latitude) coordinates to show, e.g., south atlantic anomaly induced anomalies.

    Are there anomaly data sets from other orbits than GEO available at ESTEC? Alain Hilgers will investigate. The NSSDC data set includes other anomaly data.

    Correlation between anomaly and model flux data is done by SPENVIS.

  11. Response from satellite operators (WP110)
  12. Ten letters were sent. Three answers.

    Esrange (Mats Paulsson)

    The geostationary orbit is most interesting.

    SEU, spacecraft electrostatic charging events.

    Both warning and post event analysis.

    Time scales: days, hours. False alarms: reliable tool.

    Willing to provide anomaly data but not the nature of anomaly.

    Relations between anomalies and the environment are always interesting.

    A meeting with satellite operators at Esrange was held on 13 October to discuss their views on satellite anomaly problems. They expressed an interest in this project and were willing to give further comments, to test the different modules, and to provide anomaly data if confidentiality is respected. They seem to focus on critical anomaly data (the ones resulting in a system warning). Relations between such rare anomalies and the more numerous small anomalies were not clearly identified. They are currently using NOAA SWARM (Space Weather Aeronomical Responses Models) service for investigating their anomaly data (purchase: 200 USD/year). SWARM provides data and warning but no interactive analysis capability.

    DLR (Thomas Kuch)

    Can not contribute at the moment because do not operate a spacecraft at the moment.

    Champ April 2000

    Eumetsat (Michael Williams)

    They are interested as a potential user.

    Peter Wintoft shall send email remainder to those that have not answered. Alain Hilgers will give the name of who to contact at ESOC.

    The project shall be described in SWEN. Peter Wintoft suggests what to write and send to Alain Hilgers.

  13. Status of keV electron data
  14. Contacts with G Reeves. He has given a positive answer and we have therefore a good start for the future cooperation. He has prepared a two-year data set with one-hour resolution for electrons >700 keV. A request for data in a lower energy range was sent. More interactions are foreseen.

    Are there other data sets regarding low-energy electron effects available? Can DMSP data be used? Discussion on this and how to use polar orbiting spacecraft measurements shall appear in the second draft of the technical note WP220 in January.

    It was stated here that the contractor shall make sure that the database can be extended to include new data sets.

  15. URD of WP110
  16. The layout is clear and the general content acceptable. Detailed discussion followed:

    In mandatory statements "shall" should be used instead of "will", unless there are uncertainties.

    1.2.2 Database and data base tools. User provided temporary anomaly data and ways to include permanent data should be described in the URD.

    2.2.1 In case of an extension of the database upon user-level-2 request responsibility to evaluate anomaly data on user-level-1 should be defined. IRF with agreement from ESTEC during the project time. A procedure shall be agreed with ESA at a later stage to apply when this study is finished.

    2.2.2 Alain Hilgers proposed and it was decided that in a preliminary phase registration shall be required only if the user intends to submit data sets for permanent storage.

    2.3.1 When available location shall also be stored in the database. The database shall be able to include new anomaly and space environment data sets.

    Two types of data are included, historic and real-time data. The relation between the two data types should be clarified in the URD.

    Protons and X-ray data shall be included In Table 1.

    Prediction of daily average solar wind velocity based on Wilcox solar magnetogram data shall be included if the magnetograms are available.

    Subsection on anomaly data is missing. Time shall be stored and also location, type of orbit, subclass of anomaly if available. Code names will be used. Ways to get support from ESTEC. User and code name relation. Password protection.

    Table 2 shall be updated.

    2.3.2 Add paragraphs on how to update historic, real time space weather and anomaly data.

    Possibility to delete data set.

    2.4 Improve discussion on user level 1 and 2.

    Data gaps may occur. If necessary interpolation of data will be handled by analysis tools.

    2.5 What happens if data are not available over internet? Clarification is needed.

    2.6 Data base tools shall be platform independent and shall not be directly accessible over the internet but will be used by SAPM and SAAM.

    3.1 Update capability requirements according to previous addition.

    Peter Wintoft shall submit the URD to Alain Hilgers 31 October in pdf-format. Alain Hilgers shall directly thereafter inform whether critical items exist.

  17. URD of WP210
  18. Some analysis tools shall be able to cope with a small amount of anomaly data (<10).

    1.2.1 Paragraph should be included describing implementations of on-line guidelines.

    1.2.2 Add capability to visually locate events in time series plots and geographic or geomagnetic coordinate maps.

    Add description how and capabilities to perform statistics on parameters, e.g., superposed epoch analysis, pattern search, clustering and multi-variate analysis.

    The system should include possibilities to generate new indicators for predictions.

    The more detailed comments were provided in written form from Alain Hilgers. The URD will be sent to ESTEC before 31 October.

  19. WP120
  20. The work starts this month. A preliminary version will be sent in November 1999.

  21. WP310
  22. The work starts this month. URD shall be ready at the end of November 1999. A draft version shall be sent to ESTEC by mid-November.

  23. Administrative matters
  24. Contractual aspects:

    No contractual aspects were discussed.


    ESTEC is satisfied with the way reports are made and distributed.

  25. Action Items
  26. Scheme for coding sensitive information shall be sent to Alain Hilgers for approval in the end of November 1999.

    Alain Hilgers shall investigate the availability of other anomaly data sets at ESTEC. Information shall be sent to by end of October.

    Peter Wintoft will send email remainder to those that have not responded and send the questionnaire to ESOC before the end of October.

    Alain Hilgers will give names to contact at ESOC before end of October.

    Peter Wintoft shall send information and questionnaire to SWEN before end of October.

    Peter Wintoft shall investigate usefulness of environment data from polar orbits (at least DMSP and TIROS) before the end of November.

    Peter Wintoft shall submit the URD for WP110 to Alain Hilgers before 31 October in pdf-format. Alain Hilgers shall notify in a couple of days if critical problems exist in the URD.

    A draft version of the URD for WP310 shall be sent to Alain Hilgers by mid-November.

  27. Other matters
  28. No other matters were discussed.

  29. Next meeting

A one-day meeting at ESTEC is anticipated in the beginning of January to test the prototype. The Mid-term review is planned to take place in the end of March 2000. It was decided to have the meeting in Kiruna.


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