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EARTH OBSERVATION
NASA Analyzes California's Rainfall from Space
by Harold F. Pierce for Goddard Space Flight Center
Greenbelt MD (SPX) Dec 08, 2014


GPM File image - for detailed related images and captions see here.

The Tropical Rainfall Measuring Mission or TRMM satellite and Global Precipitation Measurement or GPM constellation of satellites can measure rainfall from space. Data from TRMM and GPM were used to analyze the record-setting rainfall that fell this week in California.

Both TRMM and GPM are managed by both NASA and the Japanese Space Agency, JAXA. At NASA's Goddard Space Flight Center in Greenbelt, Maryland, a rainfall analysis was done using data from TRMM, GPM and other satellites for the California rain event.

It has been very dry in the state of California for the past couple years. The lack of rain in 2013 and 2014 contributed to exceptional drought conditions in the state.

Records were set over the past winter for the lowest winter snow packs recorded in a century. Rainfall produced by storms moving into California from the Pacific Ocean has recently brought some very temporary drought relief.

Precipitation data from various satellites such as TRMM and the GPM core observatory satellite have been collected, merged and archived at NASA Goddard since 1998 for TRMM, and starting this year for GPM. The long term collection of these data will enable increasingly accurate measurements that will be useful in global precipitation climatology.

The rainfall analysis created at NASA showed estimates of total precipitation that fell over the western United States during the past month, from Nov. 4 to Dec. 4, 2014.

Northern California received the most precipitation. This analysis indicated that downpours over the past few weeks had dropped totals of over 300 mm (11.8 inches) in some areas. Heavy precipitation that fell at higher elevations will add to snow pack totals.

The two rainfall anomaly analyses were made by comparing rainfall data compiled during the twelve year period from 2001-2012 to "near real-time" Multi-satellite Precipitation Analysis data.


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Taiyuan, China (XNA) Dec 08, 2014
China launched the CBERS-4 satellite, jointly developed with Brazil, on Sunday from the Taiyuan base by Long March-4B rocket, the 200th flight for the Long March rocket family. The rocket blasted off at 11:26 a.m. and lifted the earth resource satellite into its scheduled orbit, according to the Taiyuan satellite launch center in north China's Shanxi province. CBERS-4 is one of the s ... read more


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