Evidence of hot spot directional signature from airborne POLDER measurements

Breon, F.M., V. Vanderbilt, M. Leroy, P. Bicheron, C.L. Walthall, and J.E. Kalshoven (1997), Evidence of hot spot directional signature from airborne POLDER measurements, IEEE Trans. Geosci. Remote Sens., 35, 479-484.