1. 1 European Concert: consonants and dissonants Titus Spoelstra ESF Committee on Radio Astronomy Frequencies P.O.Box 2, 7990AA Dwingeloo, Netherlands Email: spoelstra@astron.nl, URL: http://www.astron.nl/crafspoelstra@astron.nlhttp://www.astron.nl/craf

2. 2 Passive players (1) Radio astronomy orchestras with their directions: CRAF (Europe) IUCAF (global)

3. 3 Remote sensing orchestras with their directions: EMS (Europe) EUMETNET (European) EUMETSAT (European) COSPAR (global) IUCAF (global) Passive players (2)

4. 4 Additional Orchestras: ESA CNES WMO Passive players (3)

5. 5 Concert halls ITU CEPT National Administrations Industry

6. 6 Harmony Agree on the music: -1. Adhere to the score -2. Follow the direction -3. Attune to fellow singers -4. Join in with chorus

7. 7 1. Adhere to the score Adhere to the common positions Check with ‘notes’ of other choirs Inform the ‘direction’ when disaccord could develop

8. 8 2. Follow the direction Propagate and follow the positions of direction Sing the song of the choir Take notice of other players

9. 9 Position development During position-development consult other ‘passive players’, specifically through IUCAF

10. 10 3. Attune to fellow players Follow the score Follow the direction Prevent uncoordinated action

11. 11 4. Join in with chorus Join in with chorus

12. 12 Audience (radio) astronomy: IAU Remote sensing (passive): e.g. WMO Space research (passive): COSPAR General public All radio users: URSI

13. 13 Happy? Calibration: -user satisfaction -no complements for players

14. 14 Communication Improve visibility at audience (that is often not interested in the work but in its effect)

15. 15 Dissonants Deviation from the score Deviation from direction Lack of communication Actions not coordinated with direction Consequences: - in concert hall: confusion; - for players: difficulty to achieve harmony

16. 16 Recommendations Concerted strategy Propagate sound of players