Featured Articles Archive

  • NASA's D3R radar at the GCPEx field campaign.
    Weather forecasts have come a long way, but almost every season there's a snowstorm that seems to come out of nowhere, or one that's forecast as 'the big one' that turns out to be a total bust. In the last ten years, scientists have shown that it is possible to detect falling snow and measure surface snowpack information from the vantage point of space. But there remains much that is unknown about the fluffy white stuff.  
  • GCPEx logo on falling snow background
    Beginning Jan. 17, NASA will fly an airborne science laboratory above Canadian snowstorms to tackle a difficult challenge facing the upcoming GPM satellite mission - measuring snowfall from space. Working with Environment Canada, NASA's GPM Cold-season Precipitation Experiment (GCPEx) will measure light rain and snow in Ontario from Jan. 17 to Feb. 29. The field campaign is designed to improve satellite estimates of falling snow and test ground validation capabilities.
  • GPM on the High Capacity Centrifuge
    In the clean room at NASA Goddard Space Flight Center in Greenbelt Md., GPM's  Core satellite is steadily taking shape. Set to measure rainfall worldwide after launch in 2014, GPM's two solar panels are the latest components currently undergoing rigorous testing before being integrated with the spacecraft, a process that began seven months ago when the main structural elements went on an unusual ride.
  • TRMM image of hurricane Irene intesifying as it nears the Bahamas
    August 2011: After becoming a small hurricane while passing over Puerto Rico, Irene re-emerged over the warm waters of the western Atlantic northwest of the Dominican Republic. The storm quickly intensified as deep convective towers arose near the center of Irene, releasing heat into the core of the system. In response, Irene's central pressure fell and winds intensified, making the hurricane a Category 2 storm with sustained winds reported at 100 mph.
  • The NPOL instrument, a large radar dish attached to a trailer under a blue sky
    The Midlatitude Continental Convective Clouds Experiment (MC3E) took place from April 22 – June 6, 2011, near Lamont, Oklahoma in the region surrounding the Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) Program Southern Great Plains Central Facility. The experiment was a collaborative effort between the U.S. Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) Climate Research Facility and the NASA's Global Precipitation Measurement (GPM) mission Ground Validation (GV) program.
  • Tornado funnel
    In late April, 2011, a giant storm system covered a large portion of the central and southeastern United States, causing the largest outbreak of tornados since 1974. One month later on May 22, another EF-5 tornado flattened Joplin, Missouri, killing 141 people and injuring hundreds of others. The TRMM satellite saw the severe weather unfold over the United States during both the April outbreak and the Joplin tornado.
  • CG image of the GPM satellite as it passes through space.
    The GPM Core Observatory, scheduled for launch in 2014, will provide advanced information on rain and snow characteristics and detailed 3-D views of precipitation structure, which help scientists study and understand Earth's water cycle, weather, and climate. Carrying both a dual-frequency radar and a multi-channel microwave radiometer, the Core Spacecraft will provide a new reference standard for precipitation measurements from space.
  • Visualization of a Tropical Cyclone from above as it approaches Florida
    Every year tropical cyclones (hurricanes and typhoons) cause considerable loss of life and property around the world. Constantly scanning the Earth’s surface, the TRMM instruments allow scientists to track tropical cyclones and forecast their progression. GPM will extend cyclone tracking and forecasting capabilities into the middle and high latitudes, providing new insight into how and why some tropical cyclones intensify as they move poleward.