The storm formed from the collision of a cold air mass wrapping around a warm air mass, emerging over the ocean near Okinawa on March 8. It moved northeast over the ocean south of Japan, drawing cold air west-to-east over the land, a typical winter weather pattern that also brought heavy snow over Hokkaido, the northernmost of the four main islands. After the GPM images were taken, the storm continued to move eastward, slowly intensifying before weakening in the central North Pacific.
The image shows rain rates across a 550-mile (885 kilometer) wide swath of an extra-tropical cyclone observed off the coast of Japan on March 10, 2014. Red areas indicate heavy rainfall, while yellow and blue indicate less intense rainfall. In the northwest part of the storm in the upper left of the image, the blue areas indicate falling snow.
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.
The Global Precipitation Measurement mission Core Observatory is performing normally.
The initial checkout of the GMI instrument and the spacecraft showed both are performing as expected, and the GMI instrument continues to collect science data on rain and snowfall.
The Global Precipitation Measurement mission Core Observatory is performing normally. Today, the GPM Microwave Imager (GMI) instrument started to spin at its normal rate and collect science data on rain and snowfall.
The GMI instrument is a multi-channel microwave radiometer that uses 13 channels to measure the intensity of the microwave energy emitted from Earth's surface and atmosphere. GMI will detect total precipitation within all layers of clouds, including snow and ice, and rain from drizzles to downpours.
Following activation and warm up of the Global Precipitation Measurement Microwave Imager (GMI) electronic systems, the team at NASA’s Goddard Space Flight Center in Greenbelt, Md., deployed the main reflector of the U.S. science instrument for the GPM Core Observatory.
A significant step was also achieved today in the activation of the science instrument provided by the Japan Aerospace Exploration Agency (JAXA) with the turning on of the controller for the Dual-Frequency Precipitation Radar (DPR).
Friday evening, GPM flight controllers at NASA Goddard began using the satellite’s High Gain Antenna system for high-rate data rate transmissions through NASA’s orbiting fleet of Tracking Data Relay Satellites.
Having high-rate data flowing through the TDRS system allows the spacecraft recorder to be downloaded more frequently. During science operations, TDRS communication will allow availability of science data within 3 hours of measurement.