Symposium on Radiation Measurement
Presentations and Recordings of the Symposium on Radiation Measurement held in conjunction with IPC-XIV, FRC-VI and IPgC-IV
23 September - 09 October 2025, Davos, Switzerland
The Symposium on Radiation Measurement was held in conjunction with the Fourteenth International Pyrheliometer Comparison (IPC-XIV), the Sixth Filter Radiometer Comparison (FRC-VI) and the Fourth International Pyrgeometer Comparison (IPgC-IV) at the Physikalisch-Meteorologisches Observatorium Davos/World Radiation Centre (PMOD/WRC). The table below provides the list of all presentations in column 'ppt' given at the symposium. There are also 5 reviewed proceeding papers related to some of those presentations, these articles are provided through the links indicated in bold fonts (in column 'Title'). Recordings of the presentations are available through the links provided in column 'rec'.
The content of the presentations delivered at this symposium is the sole responsibility of the respective authors and presenters. WMO has no responsibility or liability for the accuracy, completeness or use of the information contained in these presentations.
Organizers of the Symposium: Margit Haberreiter (chair), Wolfgang Finsterle
The detailed programme of the Symposium can be found here.
| Index | Title | Author(s) | ppt | rec |
| Presentations made on 23.09.2025 | ||||
| 1 | The status of the World Standard Group (WSG) | Finsterle W. | ppt | rec |
| 2 | Pyranometer sensitivity deviations: Results from calibration of 50 different field sensors | Gopi N.P. and Singh J. P. | ppt | rec |
| 3 | Solar radiation measurements and calibrations by SMN in Argentina | Nollas F. and Carbajal B. G. | ppt | rec |
| 4 | Recent activities of Regional Radiation Center Tokyo | Sasaki S. | ppt | rec |
| Presentations made on 24.09.2025 | ||||
| 1 | Surface azimuth misalignments estimated from solar irradiance on tilted surfaces | Piccioli I. | rec | |
| 2 | Spectrally resolved responsivity calibration of pyrgeometers at PTB | Feierabend M. et al. | ppt | rec |
| 3 | Solar irradiance measurement; relevance to users of solar photovoltaic energy systems | Van den Bos K. and Cornelis J. | ppt | rec |
| 4 | Primary calibration of reference solar cells at PTB | Kroeger I. et al. | ppt | rec |
| 5 | Quantification of how solar radiation management affects photovoltaic energy production | Kilchhofer K. et al. | ppt | rec |
| 6 | Monitoring climate and solar radiation in Chile: A historical and institutional perspective | Valdés L. | ppt | rec |
| 7 | Pyrgeometer calibrations at the 4th International Pyrgeometer Comparison and the planned redefinition of the infrared longwave irradiance scale | Gröbner J. | ppt | rec |
| 8 | Two decades of aerosol trends: Insights from CAMS reanalysis | Moustaka A. et al. | ppt | rec |
| Presentations made on 25.09.2025 | ||||
| 1 | Sensor design and calibration for 2000 x concentrated solar irradiance | Van den Bos K. and Cornelis J. | ppt | rec |
| 2 | A new sensor for measuring diffuse and global irradiance using an internal automated shadowband | Tatsiankou V. and Beal R | ppt | rec |
| 3 | Upgrade of the PMO5 WSG radiometer | Suter M. and Buchli J. | rec | |
| 4 | Operations of the University of Oregon solar radiation network | Peterson J. | ppt | rec |
| 5 | Total solar irradiance measurements using a traceable spectroradiometer | Dhrona J. | ppt | rec |
| 6 | Intercomparison of aerosol optical depth retrievals from GAW-PFR and SKYNET sun photometer networks and the effect of calibration | Karanikolas A. | ppt | rec |
| 7 | Total column ozone retrieval from BTS array spectroradiometer by applying a custom double ratio technique | Egli L. | ppt | rec |
| 8 | World Standard Group 2.0 | Finsterle W. | ppt | rec |
| Presentations made on 30.09.2025 | ||||
| 1 | Utilizing GHI and DHI data for the validation and correction factor estimation of pyrheliometer DNI | Saputro R. W. | ppt | rec |
| 2 | Solar radiation measurements – Journey of IMD | Kumar V. and Madan R. | ppt | rec |
| 3 | Photovoltaic Systems Evaluation Laboratory (PSEL) program overview | Robinson C. | rec | |
| 4 | Overview of ISO-Cal North America | Naranen E. | ppt | rec |
| 5 | An overview on radiation division at EMA | Hassan H. | ppt | rec |
| 6 | Update of TSI measurements at PMOD and products | Montiller J.-P. | ppt | rec |
| 7 | Solar radiation monitoring at the Swedish Meteorological and Hydrological Institute | Carlund T. | ppt | rec |
| 8 | Radiation networks in Africa | Meyer R. | ppt | rec |
| 9 | NREL pyrheliometer comparisons (NPC) | Andreas A. and Reda I. et al. | ppt | rec |
| 10 | Latest Trends in large scale Photovoltaics | Meyer R. | ppt | rec |
| Presentations made on 01.10.2025 | ||||
| 1 | Active cavity pyrgeometer progress towards an absolute SI reference (online) | Forgan B. | ppt | rec |
| 2 | Uncertainty of calibration with respect to solar radiation reference | Vuilleumier L. | rec | |
| 3 | Irradiance measurement uncertainty for cavity radiometers participating in IPC | Muellejans H. | ppt | rec |
| 4 | Comparison of NSRDB data with stations of the Mexican solarimetric network | Rosas D. R. | ppt | rec |
| 5 | Overview of photovoltaic soiling measurement devices | Meyer R. | ppt | rec |
| 6 | Solar radiation management - Status and open questions | Vattioni S. | ppt | rec |
| 7 | BSRN / PRS network resilience - A case study | Hiscock D. | ppt | rec |
| 8 | Monitoring of pyranometer thermal offset in the national radiation centrum of Slovak Hydrometeorological Institute | Pribullova A. | ppt | rec |
| 9 | Impact of solar radiation data recording intervals on solar power plant evaluation in Thailand | Pattarapanitchai S. et al. | ppt | rec |
| 10 | Activities at the Lindenberg WMO Regional Radiation Center | Wacker S. | rec | |
| 11 | Pyranometer non-stability and drift | Mes J. | ppt | rec |
| Presentations made on 06.10.2025 | ||||
| 1 | SIAR-6 absolute radiometer | Kai W. | ppt | rec |
| 2 | Solar radiation measurements and applications at South African Weather Services (SAWS) | Mabasa B. | ppt | rec |
| 3 | Baseline Surface Radiation Network (BSRN) | Knap W. | ppt | rec |
| 4 | PV reference cell non-stability and drift (online) | Driesse A. | rec | |
| 5 | AOD retrievals from spectral DNI measured by spectroradiometers | Doppler L. | ppt | rec |
| 6 | A primary irradiance standard based on a predictable quantum efficient detector coupled with an ultra-stable, homogeneous laser beam | Ferhat S. and Gröbner J. | rec | |
| 7 | Overview of the use of the ground-based sun photometric aerosol retrievals to solar energy applications (online) | Papachristopoulou K. et al. | ppt | rec |
| 8 | Solar radiometer comparison | Jensen A. et al. | ppt | rec |
| 9 | 5x IPC 2005 – 2025 (plus 1990 and 1995) | Knap W. | ppt | rec |
| 10 | Carl Dorno’s apparat zur dauerphotographie: Getting it back to live | Hülsen G. | ppt | rec |
| 11 | Aerosol optical depth from SI-traceable direct solar spectral irradiance measurements | Gröbner J. et al. | ppt | rec |
| 12 | An introduction to uncertainty in ISO 9846:2025 | Balenzategui J. et al. | ppt | rec |
| Presentations made on 09.10.2025 | ||||
| 1 | Preliminary results | Finsterle W. | ppt | rec |
| 2 | 4th International Pyrgeometer Comparison IPgC-IV | Gröbner J. | ppt | rec |
| 3 | Treatability of WMO AOD reference (GAWPFR-TRAID) FRC-VI preliminary results | Kouremeti N. | rec | |
Last updated: 12 November 2026