Spectrometer Calibration in Five Central Asian Countries

In this paper, a new and simple five-parameter spectrogram model is developed by simplifying the phase-matching equation of the VIPA etalon and considering the angle between the camera and dispersion direction, which can achieve a frequency accuracy better than one pixel. In the landscape of modern analytical science, UV-Visible (UV-Vis) spectrophotometry stands as a cornerstone technique, indispensable in fields ranging from clinical chemistry and environmental monitoring to pharmaceutical quality control. This powerful method allows for the precise quantification. The Geostationary Environment Monitoring Spectrometer (GEMS), launched by the Republic of Korea in February 2020, enables the hourly monitoring of air pollution levels for almost 20 countries in Asia. This study describes improvements made to the GEMS aerosol retrieval (AERAOD). Wavelength calibration is a crucial step in the practical application of the spectrometer. The relationship between wavelength and pixel position on the detector can be determined through characteristic spectral calibration. To apply the spectrometer to multi-channel spectral detection and other. Spectrometers are precision instruments used to measure the intensity of light across a spectrum. They are vital in various scientific fields, including chemistry, physics, and material science. GEMS is a hyperspectral spectrometer measuring solar irradiance and Earth radiance in the wavelength range of 300 to 500 nm. [PDF]

Optical Power Meter Calibration in Five Central Asian Countries

Absolute optical power calibration of optical power meters, radiometers and photodiodes: From 350 to 1650 nm in 5 nm steps, power range +10 to -60 dBm / 10 mW to 1 nW, with least uncertainty of 0.06 dB. [PDF]