1. International Pyrheliometer Comparison XI September 27 to October 15, 2010

2. Opening IPC XI Welcome PMOD/WRC Werner Schmutz (Director PMOD/WRC)
Welcome WMO Isabelle Rüedi
(Senior Scientific Officer)
Orientation IPC Wolfgang Finsterle
(Chef IPC XI)
Opening IPC XI

3. Early Pyrheliometer Comparisons
Pyrheliometer Comparisons have been organized and discussed since the existence of the radiation commissions
The Radiation Commission of IMO ( )
The Radiation Commission of the IUGG ( )
The International Radiation Commission of IAM/IAMAS/IAMAP - IUGG ( )
Early Pyrheliometer Comparisons

4. Atmospheric Chemistry and Global Pollution (ICACGP)
Atmospheric Electricity (ICAE)
Climate (ICCL)
Clouds and Precipitation (ICCP)
Dynamic Meteorology (ICDM)
Meteorology of the Middle Atmosphere (ICMMA)
Planetary Atmospheres and their Evolution (ICPAE)
Polar Meteorology (ICPM)
Ozone (IOC)
Radiation (IRC)
Commissions of IAMAS

5. Meetings of Radiation Commissions
Meetings of Radiation Commissions

6. Pyrheliometer comparisons in Davos 1934
Pyrheliometer comparisons in Davos 1934

7. IRC and CIMO-WMO in Davos 1956
IRC and CIMO-WMO in Davos 1956

8. Walter Mörikofer and Fritz Möller in Davos
Walter Mörikofer and Fritz Möller in Davos

9. Walter Mörikofer, Davos, Switzerland, Director PMOD
Picture curtsey of Hans Volkert
Oxford, UK, July 20, 1959

10. On the roof of the PMOD, house Dora, Davos Platz
IPC I 1959

11. On the roof of the PMOD, house Dora, Davos Platz
IPC II 1964

12. 1970 creation of the World Radiation Center in Davos, thanks to the excellent world-wide contacts (WMO, IRS and IAMAS) of Mörikofer, former director of PMOD and for many years president of the International Radiation Commission
On the roof of the PMOD, house Dora, Davos Platz
IPC III 1970

13. IPC IV 1975 On the roof of Thurgauer-Schaffhauser clinic, Davos Platz
IPC IV 1975

14.
For the first time in front of the old schoolhouse, Davos Dorf
IPC V 1980

15.
The last comparisons of Claus Fröhlich, director of PMOD/WRC
IPC VIII 1995

16. International Pyrheliometer Comparisons IPC-X, 2005, Davos
IPC X 2005

17. Welcome to the IPC XI at PMOD/WRC!
Welcome to the IPC XI at PMOD/WRC!