| SOLAR/SOLSPEC: Scientific objectives, instrument performance and its absolute calibration using a blackbody as primary standard source G Thuillier, T Foujols, D Bolsée, D Gillotay, M Hersé, W Peetermans, ... Solar Physics 257, 185-213, 2009 | 84 | 2009 |
| Spectral-irradiance scale based on radiometric black-body temperature measurements P Sperfeld, KH Raatz, B Nawo, W Möller, J Metzdorf Metrologia 32 (6), 435-439, 1995 | 69 | 1995 |
| Investigation of high-temperature black body BB3200 P Sperfeld, J Metzdorf, NJ Harrison, NP Fox, BB Khlevnoy, ... Metrologia 35 (4), 419, 1998 | 54 | 1998 |
| Direct traceability of the portable QASUME irradiance scale to the primary irradiance standard of the PTB J Gröbner, P Sperfeld Metrologia 42 (2), 134, 2005 | 53 | 2005 |
| Highly reliable silicon carbide photodiodes for visible-blind ultraviolet detector applications D Prasai, W John, L Weixelbaum, O Krüger, G Wagner, P Sperfeld, ... Journal of Materials Research 28, 33-37, 2013 | 46 | 2013 |
| Traceability of solar UV measurements using the Qasume reference spectroradiometer G Hülsen, J Gröbner, S Nevas, P Sperfeld, L Egli, G Porrovecchio, M Smid Applied optics 55 (26), 7265-7275, 2016 | 45 | 2016 |
| Improvement and extension of the black-body-based spectral irradiance scale P Sperfeld, J Metzdorf, SG Yousef, KD Stock, W Möller Metrologia 35 (4), 267, 1998 | 44 | 1998 |
| The high-resolution extraterrestrial solar spectrum (QASUMEFTS) determined from ground-based solar irradiance measurements J Gröbner, I Kröger, L Egli, G Hülsen, S Riechelmann, P Sperfeld Atmospheric Measurement Techniques 10 (9), 3375-3383, 2017 | 41 | 2017 |
| Accurate Determination of the TOA Solar Spectral NIR Irradiance Using a Primary Standard Source and Bouguer-Langley Technique D Bolsée, N Pereira, W Decuyper, D Gillotay, H Yu, P Sperfeld, S Pape, ... Solar Physics, 2014 | 33 | 2014 |
| Characterization and use of deuterium lamps as transfer standards of spectral irradiance P Sperfeld, KD Stock, KH Raatz, B Nawo, J Metzdorf Metrologia 40 (1), S111, 2003 | 31 | 2003 |
| Measurement and calculation of the emissivity of a high-temperature black body SG Yousef, P Sperfeld, J Metzdorf Metrologia 37 (5), 365, 2000 | 31 | 2000 |
| Providing radiometric traceability for the calibration home base of DLR by PTB DR Taubert, J Hollandt, P Sperfeld, S Pape, A Höpe, KO Hauer, P Gege, ... AIP Conference Proceedings 1531 (1), 376-379, 2013 | 25 | 2013 |
| International comparison of radiation-temperature measurements with filtered detectors over the temperature range 1380 K to 3100 K NJ Harrison, NP Fox, P Sperfeld, J Metzdorf, BB Khlevnoy, ... Metrologia 35 (4), 283, 1998 | 24 | 1998 |
| Intercomparison of radiation temperature measurements over the temperature range from 1600 K to 3300 K BB Khlevnoy, NJ Harrison, LJ Rogers, DF Pollard, NP Fox, P Sperfeld, ... Metrologia 40 (1), S39, 2003 | 21 | 2003 |
| Detector-stabilized FEL lamps as transfer standards in an international comparison of spectral irradiance KD Stock, KH Raatz, P Sperfeld, J Metzdorf, T Kübarsepp, P Kärhä, ... Metrologia 37 (5), 441, 2000 | 18 | 2000 |
| The use of self-consistent calibrations to recover absorption bands in the black-body spectrum P Sperfeld, SG Yousef, J Metzdorf, B Nawo, W Möller Metrologia 37 (5), 373, 2000 | 18 | 2000 |
| Performance limitations of carbon-cavity blackbodies due to absorption bands at the highest temperatures P Sperfeld, S Pape, B Khlevnoy, A Burdakin Metrologia 46 (4), S170, 2009 | 17 | 2009 |
| Thermodynamic temperature measurements of the melting curves of RE-C, TIC-C And ZRC-C eutectic irradiance mode fixed-point cells J Hartmann, K Anhalt, P Sperfeld, J Hollandt, M Sakharov, B Khlevnoy, ... Proc. TEMPMEKO’04 1, 189-194, 2005 | 16 | 2005 |
| Final report on the CIPM key comparison CCPR-K1. b: Spectral irradiance 200 nm to 350 nm P Sperfeld Metrologia 45 (1A), 02002-02002, 2008 | 15* | 2008 |
| NIST-PTB measurements of the radiometric temperatures of a high-temperature black body using filter radiometers HW Yoon, P Sperfeld, SG Yousef, J Metzdorf Metrologia 37 (5), 377, 2000 | 15 | 2000 |
