Petri Kärhä
Principal University Lecturer
T412 Department of Information and Communications Engineering
Principal University Lecturer
Full researcher profile
https://research.aalto.fi/...
Contact information
Email
[email protected]
Postal address
Maarintie 8
02150 Espoo
Finland
Phone number
+358505968469
Research groups
- Metrology Research Institute, Senior University Lecturer
Publications
Effect of adaptive control on the LED street luminaire lifetime and on the lifecycle costs of a lighting installation
J. Askola, P. Kärhä, H. Baumgartner, S. Porrasmaa, E. Ikonen
2022
Lighting Research and Technology
Improvement In The Temporal Light Artefact Metrics Of Commercial Led Lamps
Erkki Ikonen, Roope Nordlund, Ville Mantela, Janne Askola, Petri Kärhä
2022
In-Space Radiometric Calibration of Nanosatellite Camera
Olli Knuuttila, Esa Kallio, Noora Partamies, Mikko Syrjäsuo, Kirsti Kauristie, Viktoria Sofieva, Ari-Matti Harri, Antti Kestilä, Jarmo Kivekäs, Petri Koskimaa, Jouni Rynö, Johanna Tamminen, Petri Kärhä, Juha-Matti Lukkari, Arno Alho, Tuija Pulkkinen
2022
JOURNAL OF SMALL SATELLITES
Optical power scale realization using the predictable quantum efficient detector
Kinza Maham, Petri Kärhä, Farshid Manoocheri, Erkki Ikonen
2022
Journal of Physics: Conference Series
Novel Implementations Of Digital Meters For Flicker And Stroboscopic Effect
Ville Mantela, Roope Nordlund, Janne Askola, Petri Kärhä, Erkki Ikonen
2022
PV Module Energy Rating Standard IEC 61853-3 Intercomparison and Best Practice Guidelines for Implementation and Validation
Malte Ruben Vogt, Stefan Riechelmann, Ana Maria Gracia-Amillo, Anton Driesse, Alexander Kokka, Kinza Maham, Petri Karha, Robert Kenny, Carsten Schinke, Karsten Bothe, James Blakesley, Esma Music, Fabian Plag, Gabi Friesen, Gianluca Corbellini, Nicholas Riedel-Lyngskar, Roland Valckenborg, Markus Schweiger, Werner Herrmann
2022
IEEE Journal of Photovoltaics
Increased detector response in optical overfilled measurements due to gas lens formation by nitrogen flow through the entrance aperture
J. Askola, K. Maham, Petri Kärhä, E. Ikonen
2021
Metrologia
Increased response of trap detectors with apertures due to nitrogen flow
Janne Askola, Kinza Maham, Mikhail Korpusenko, Petri Kärhä, Erkki Ikonen
2021
Differential spectral responsivity measurements of large bifacial solar cells
Petri Kärhä, Janne Askola, Kinza Maham, Timo Dönsberg, Erkki Ikonen
2021
Unknown correlations in spectral quantities and a method for taking them into account in uncertainty of spectral mismatch in solar cell calibration
Petri Kärhä, Kinza Maham, Erkki Ikonen
2021