Thekaekara M P, Kruger R, Duncan C H
Appl Opt. 1969 Aug 1;8(8):1713-32. doi: 10.1364/AO.8.001713.
Measurements of the solar constant and solar spectrum were made from a research aircraft flying at 11.58 km, above almost all of the highly variable and absorbing constituents of the atmosphere. A wide range of solar zenith angles was covered during six flights for over 14 h of observation. Results are presented from nine different instruments which complemented each other in measuring techniques and wavelength range and were calibrated and operated by different experimenters. A new value of the solar constant, 135.1 mW cm(-2), has been derived, as well as a revised solar spectral irradiance curve for zero air mass.
在一架飞行高度为11.58千米的科研飞机上进行了太阳常数和太阳光谱的测量，该高度几乎高于大气层中所有高度可变且具有吸收性的成分。在六次飞行中，观测时间超过14小时，涵盖了广泛的太阳天顶角范围。研究结果来自九种不同的仪器，这些仪器在测量技术和波长范围上相互补充，由不同的实验人员进行校准和操作。得出了太阳常数的新值135.1毫瓦/平方厘米，以及零空气质量下修订后的太阳光谱辐照度曲线。
