International comparison of the SIAR measurement and the WRR standard

【摘要】 We experimentally compare the solar irradiance absolute radiometer(SIAR) measurement with the world radiometric reference(WRR) standard to improve the accuracy of instrument.The SIAR joined in the international pyrheliometer comparison(IPC) in 2000.The comparison results show that the calibration factors for SIAR to WRR are 0.999 220, 1.001 694, 0.998 334 and 0.997 439 in the 9 th IPC, the 10 th IPC, the 11 th IPC and the 12 th IPC, respectively.These results are added to the measurement uncertainty budget of SIAR.The repeatability of the SIAR-type absolute radiometers is also investigated.The relative error introduced by two SIAR-type absolute radiometers is within 0.25%.更多还原

【Abstract】 We experimentally compare the solar irradiance absolute radiometer(SIAR) measurement with the world radiometric reference(WRR) standard to improve the accuracy of instrument.The SIAR joined in the international pyrheliometer comparison(IPC) in 2000.The comparison results show that the calibration factors for SIAR to WRR are 0.999 220, 1.001 694, 0.998 334 and 0.997 439 in the 9 th IPC, the 10 th IPC, the 11 th IPC and the 12 th IPC, respectively.These results are added to the measurement uncertainty budget of SIAR.The repeatability of the SIAR-type absolute radiometers is also investigated.The relative error introduced by two SIAR-type absolute radiometers is within 0.25%.更多还原