LRR-X 1st Image (NASA DC-8)
Precipitation Target of Opportunity for 13 June 2003 Flight:
University of Wisconsin NWP 12 hour forecast for 13 June 2003 locates possible precip target low off the West coast of British Columbia and extending up toward the Gulf of Alaska.
LRR-X First Image
LRR-X first rain image (10.7 GHz Brightness Temperature):
Cross track image of Tb has variable slant path and ocean surface incidence angle versus off-nadir angle.
Colder Tb at edges of swath are due to lower horizontally polarized surface emission.
Emission by precipitation is visible as yellow streaks.
LRR-X Zenith-Normalized Path Integrated Attenuation (ZN-PIA)
LRR-X estimated rain rate:
Rain rate estimated from PIA by acquiring freezing level from PR-2, then using parameterized slab model for rain distribution below sea level.
Freezing level from PR-2: 5000 feet.
LRR-X TB Image (500m Resolution) - Composite of three east/west raster scan flight lines.
Note: Cross-track variation in background ocean TB due to incidence angle.
LRR-X PIA Image (500m resolution)
Note: Zenith normalization removes cross-track incidence angle dependence. Discontinuities between flight lines likely real; time difference ~30 minutes between flight lines.
LRR-X Rain Rate Image (500 m Resolution)
Note: Derived from PIA using simple slab model with Marshall-Palmer DSD & coastal RaOb T(z)
Ancillary AMSR Retrievals during 13 June 2003 LRR-X Flight
Sea Surface Temperature
2. Surface Wind Speed
3. Cool Liquid Path
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