Title :
Simultaneous measurements of atmospheric water vapor with MIR, Raman lidar and rawinsondes
Author :
Wang, J.R. ; Melfi, S.H. ; Racette, P. ; Whitemen, D.N. ; Kakar, R.K. ; Ferrare, R.A. ; Evans, K.D. ; Schmidlin, F.J.
Author_Institution :
NASA Goddard Space Flight Center, Greenbelt, MD, USA
Abstract :
Simultaneous measurements of atmospheric water vapor were made by millimeter-wave imaging radiometry (MIR), Raman lidar and rawinsondes. Three types of rawinsonde sensor packages (AIR, Vaisala and VIZ) were carried by the same balloon. The measured water vapor profiles from Raman lidar and the Vaisala, VIZ and AIR sondes are used in the radiative transfer calculations. The resultant brightness temperatures are compared with those measured from the MIR at all six frequencies (89, 150, 183.3±1, 183.3±3, 183.3±7, and 220 GHz). The results show that the MIR measured brightness temperatures agree well (within ±2 K) with those calculated from the Raman lidar and Vaisala measurements. The brightness temperatures calculated from the AIR sondes differ from the MIR measurements by as much as 10 K. The discrepancy and its implication are discussed in detail
Keywords :
atmospheric humidity; atmospheric techniques; optical radar; radiometry; remote sensing; remote sensing by laser beam; 89 to 220 GHz; AIR; EHF; MIR; Raman lidar; VIZ; Vaisala; atmosphere meteorology; brightness temperature; humidity; laser; measurement technique; millimeter-wave imaging radiometry; millimetre radiometry; millimetric method; mm wave; rawinsonde; water content; water vapour; Atmospheric measurements; Brightness temperature; Image sensors; Laser radar; Millimeter wave measurements; Millimeter wave technology; NASA; Packaging; Satellite broadcasting; Sea measurements;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1993. IGARSS '93. Better Understanding of Earth Environment., International
Conference_Location :
Tokyo
Print_ISBN :
0-7803-1240-6
DOI :
10.1109/IGARSS.1993.322649
