@article{oai:repository.dl.itc.u-tokyo.ac.jp:00000840,
 author = {Tanaka, Masayuki and Nakajima, Teruyuki and Shiobara, Masataka},
 issue = {7},
 journal = {Applied optics},
 month = {Apr},
 pages = {1170--1176},
 title = {Calibration of a sunphotometer by simultaneous measurements of direct-solar and circumsolar radiations},
 volume = {25},
 year = {1986}
}