Several instruments and spacecraft from NASA's Jet Propulsion Laboratory in Pasadena, California, have eyes on Hurricane Dorian, capturing different types of data from the storm.



An infrared image of Hurricane Dorian, as seen by the AIRS instrument aboard NASA's Aqua satellite at 1:30 p.m. EDT (10:30 a.m. PDT) on Aug. 29, 2019. The large purple areas are cold clouds, carried high into the atmosphere by deep thunderstorms. Blue and green show warmer areas with less rain clouds, while orange and red represent mostly cloud-free air. Credit: NASA/JPL-Caltech

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NASA's Atmospheric Infrared Sounder (AIRS), aboard the Aqua satellite, senses emitted infrared and microwave radiation from Earth. The information is used to map such atmospheric phenomena as temperature, humidity, and cloud amounts and heights. In the AIRS imagery of Dorian, captured during the afternoon (local time) of Aug. 29, 2019, the large purple area indicates very cold clouds carried high into the atmosphere by deep thunderstorms. These clouds are also associated with heavy rainfall. Blue and green indicate warmer areas with shallower rain clouds, while the orange and red areas represent mostly cloud-free air.



Hurricane Dorian off the coast of Puerto Rico, as seen by the small satellite TEMPEST-D on Aug 28, 2019 (local time). The colors in the image reveal the heavy rain and moisture inside the storm. The least intense areas of rainfall are shown in green and most intense are yellow and pink. Credit: NASA/JPL-Caltech

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In the second image, TEMPEST-D - a weather-observing satellite the size of a cereal box - captured imagery of Hurricane Dorian off the coast of Puerto Rico in the early morning hours (local time) of Aug. 28, 2019. At a vantage point 250 miles (400 kilometers) above the storm, the CubeSat used its miniaturized radio-wave-based instrument to see through the clouds, revealing areas with heavy rain and moisture being pulled into the storm. The green colors show moisture spiraling into the storm's center, and the yellow to pink colors correspond to the most intense rainfall. TEMPEST-D - short for Temporal Experiment for Storms and Tropical Systems Demonstration - is an experiment in shrinking weather satellites to a size that makes them inexpensive enough to be produced in multiples. The goal is eventual real-time storm coverage with many small satellites that can track storms around the world.

NASA's CloudSat satellite provided a 3D animation after passing over Dorian, still a tropical storm at the time, near Puerto Rico. CloudSat uses an advanced cloud-profiling radar that "slices" through clouds, enabling us to see their height, their different layers and the areas where the heavier bands of rain are found within the storm system. The animation shows Dorian when it had maximum sustained winds of 52 mph (84 kph) with some cloud tops extending about 9 miles (15 kilometers) into the atmosphere. The colors represent the size of water or ice droplets inside the storm: Deep red and pink indicate larger droplets with areas of moderate and heavy rainfall.

NASA collects data from space, air, land and sea to increase our understanding of our home planet, improve lives and safeguard our future.

AIRS, in conjunction with the Advanced Microwave Sounding Unit (AMSU), provides a 3D look at Earth's weather and climate. Launched into Earth orbit in 2002, the AIRS and AMSU instruments are managed by JPL under contract to NASA. TEMPEST-D is a technology-demonstration mission led by Colorado State University and managed by JPL in partnership with Blue Canyon Technologies and Wallops Flight Facility in Virginia. The mission is sponsored by NASA's Earth Ventures program and managed by the Earth Science Technology Office. The radiometer instrument was built by JPL and employs high-frequency microwave amplifier technology developed by Northrop Grumman. CloudSat is also managed by JPL, which developed the radar instrument, with hardware contributions from the Canadian Space Agency. Colorado State University provides scientific leadership and science data processing and distribution.

JPL is managed by Caltech in Pasadena for NASA.

More information about these missions is available here:

https://airs.jpl.nasa.gov/

https://www.jpl.nasa.gov/cubesat/missions/tempest-d.php

https://cloudsat.atmos.colostate.edu/home

More information about NASA's Disasters Program is available here:

https://disasters.nasa.gov/

News Media Contact

Esprit SmithJet Propulsion Laboratory, Pasadena, Calif.818-354-4269esprit.smith@jpl.nasa.govArielle SamuelsonJet Propulsion Laboratory, Pasadena, Calif.818-354-0307arielle.a.samuelson@jpl.nasa.gov2019-179