DPR

GPM's Stormy New View

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On March 10, the Core Observatory passed over an extra-tropical cyclone On March 10, the Core Observatory passed over an extra-tropical cyclone about 1055 miles (1700 kilometers) due east of Japan's Honshu Island. Satellite data shows the full range of precipitation in the storm. 

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First Images from GPM

First Images from GPM
Image Caption: 
The Dual-frequency Precipitation Radar observes rainfall and snowfall that occurs within clouds in three dimensions, across the surface of the Earth and upward into the atmosphere.
An extra-tropical cyclone was observed over the northwest Pacific Ocean off the coast of Japan on March 10, 2014. 
 
The graph on the left shows the extra-tropical storm seen by the DPR as the satellite passed overhead. The x-axis is the east-west longitude and the y-axis is north-south latitude. The colors show the rain rate at sea-level, with more intense rainfall represented by red and lighter precipitation shown in blue. The line from A to B shows the location of the two cross-sections on the right.
 

First Images from GPM Dual-Frequency Precipitation Radar

First Images from GPM Dual-Frequency Precipitation Radar
Image Caption: 
3D view inside an extra-tropical cyclone observed off the coast of Japan, March 10, 2014, by GPM's Dual-frequency Precipitation Radar.

First data visualization of the three-dimensional structure of precipitation collected by the Dual-frequency Precipitation Radar aboard the Global Precipitation Measurement (GPM) mission's Core Observatory. The image shows rain rates across a vertical cross-section approximately 4.4 miles (7 kilometers) high through an extra-tropical cyclone observed off the coast of Japan on March 10, 2014. The DPR 152-mile (245 kilometers) wide swath is nested within the center of the GPM Microwave Imager's wider observation path.

Calibrating Thrusters, Verifying Science Data

The Global Precipitation Measurement mission's Core Observatory is performing normally.

On March 12, the GPM Core Observatory fired its thrusters for a 30-second check-out of their performance. The burn, called a delta-v, changes the velocity of the spacecraft to adjust the altitude of its orbit. This week's short maneuver did not greatly alter the satellite's orbit but was used instead for further calibration of the thrusters.

Functional checkout activities and internal calibration of the Dual-frequency Precipitation Radar continued this week.

DPR Activated, in Checkout

On Saturday, March 8, just after 10 a.m. EST, the second of the two science instruments aboard the Global Precipitation Measurement (GPM) mission's Core Observatory was activated, and the teams in the mission operations center and launch support room at NASA's Goddard Space Flight Center in Greenbelt, Md., began the instrument's checkout period.

Lecture: Finding Hot Towers in Hurricanes

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Owen Kelley, research scientist at NASA Goddard Space Flight Center,  discusses the science, the technology and the researcher who coined the term "hot tower" 50 years ago. During the past decade, NASA's Tropical Rainfall Measuring Mission satellite has been able to collect definitive statistics on the association of hot towers (towering thunderclouds) and hurricane intensification.

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