Ellen Gray

2014 PMM Science Team Meeting Summary from the Earth Observer, November 2014

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This excerpt from the November 2014 edition of The Earth Observer provides a summary of the activities at the PMM Science Team Meeting which took place from August 4 - 7, 2014. The PMM program supports scientific research, algorithm development, and ground-based validation activities for the Tropical Rainfall Measuring Mission (TRMM) and the Global Precipitation Measurement (GPM) Core Observatory that launched on February 27, 2014.

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TRMM Out Of Fuel, Continues to Provide Data

TRMM Out Of Fuel, Continues to Provide Data

Pressure readings from the Tropical Rainfall Measuring Mission's (TRMM) fuel tank on July 8 indicated that the satellite was nearly at the end of its fuel supply. As a result, NASA has ceased maneuvers to keep the satellite at its operating altitude of 402 kilometers (~250 miles). With its speed decreasing, TRMM has begun to drift downward. A small amount of fuel remains to conduct debris avoidance maneuvers to ensure the satellite remains safe.

NASA Begins IPHEx Field Campaign

NASA Begins IPHEx Field Campaign

Rain, ice, hail, severe winds, thunderstorms, and heavy fog – the Appalachian Mountains in the southeast United States have it all. On May 1, NASA begins a campaign in western North Carolina to better understand the difficult-to-predict weather patterns of mountain regions. The field campaign serves as ground truth for measurements made by the Global Precipitation Measurement (GPM) mission's Core Observatory.

High Gain Antenna Deployed

The GPM Core Observatory continues power positive, stable on the sun line and communicating with the GPM Mission Operations Center at NASA’s Goddard Space Flight Center in Greenbelt, Md.

The spacecraft magnetic torquer bar polarity was adjusted to eliminate rotational momentum gain. Star trackers were turned on and the High Gain Antenna was successfully deployed.

Live from Japan: GPM Tweet Chat Recap

Live from Japan: GPM Tweet Chat Recap

Global Precipitation Measurement is a big mission. You've got questions? We've got answers.

Three days before launch of the Global Precipitation Measurement (GPM) Core Observatory from Tanegashima Space Center in Japan, NASA staff supporting the mission set up shop in the lobby of the Sun Pearl Hotel in nearby Minamitane for a live Twitter Q-and-A to answer questions about the mission and what it will do in orbit.


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