Access Keys:
Skip to content (Access Key - 0)
All CIMA spaces


This space

2013 Activity Report

Information Technology Working Group - 2013 Activity Report

This WG was established during the 2009 CIMA Meeting as the "Internet Presence Working Group" in order to develop a collaborative workspace for CIMA. The 2012 CIMA Meeting decided to widen the scope of the working group and to and to rename the WG accodingly.

The members of the WG are

  • José Luis Esteban (ESP) Chairman
  • Richard Meredith-Hardy (GBR, CIMA President)
  • Nayot Kurukitkoson (THA)
  • Faustine Carrera (FAI Secretariat)

Wiki Activity

The CIMA wiki has not suffered any relevant changes, and its use follows the pattern of previous years.

CASI decision on WGS84

The CASI 2012 meeting decided to impose the use of the WGS84 Earth model in all air sport activities. However, some commissions had problems to comply with the new rule. CASI then decided to create a working group to analyse the problem and propose a solution.

The so called "CASI Mathematics Working Group" was created, composed by Hans Åkerstedt (CIA, SWE), José Luis Esteban (CIMA, ESP), Joerg Ewald (CIVL, CHE), Rick Sheppe (IGC, USA). See the Terms of Reference .

The WG delivered its report to CASI , where the problem was described and a major revision of GS Chapter 7 was proposed. This was included as a formal proposal to CASI and accepted during the 2013 meeting (see point 12 of the meeting minutes ).

Practical consequences

The new version of the General Section of the Sporting Code allows Air Sports Commissions to decide on the methods to make measurements and calculations that are suitable for their activities.

The ASCs will be responsible to define rules for measurements and calculations as established by the following provisions (the list is not exhaustive):

7.1 Measurements

  • 7.1.2 General. The methods and standards of precision for measuring and recording of Position, Distance, Time, Altitude, Mass and other primary values, as well as equipment technical standards, shall be determined by each FAI Air Sport Commission and specified in the appropriate section of the Sporting Code.

7.2 Calculations

  • 7.2.1 General. The methods and standards of precision for calculating Distance, Bearing, Altitude, Speed, and Scores shall be determined by each FAI Air Sport Commission and specified in the appropriate section of the Sporting Code.
  • 7.2.2 Earth Model. The Air Sport Commissions are responsible for the specification of the basis of geometric calculations. If not otherwise specified by the Air Sport Commissions, the earth model to be used for geometric calculations shall be the WGS84 ellipsoid. If a sphere is specified, it shall be the “FAI Sphere.” If a planar model is to be used, then the projection must be strictly defined.
  • 7.2.5 Altitude. The methods for calculations of corrections to measured altitudes (if required) shall be specified by the Air Sport Commissions.

7.4 Approvals

  • 7.4.1 As an alternative to specifying algorithms, each Air Sport Commission may meet its obligation to specify computational methods by approving specific flight evaluation and scoring programs. If this method is used, then the ASC must implement procedures for testing, approval, and version control of the flight evaluation and scoring programs.

Added by José Luis Esteban Last edited by José Luis Esteban on 18 Nov, 2013 23:50. Quick links: or 2013 Activity Report
Enter labels to add to this page:
Please wait 
Looking for a label? Just start typing.
Adaptavist Theme Builder Powered by Atlassian Confluence