TIMED Web Site

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New Horizons: NASA's Pluto-Kuiper Belt Mission

Click here to see the current location of TIMED.

Science operations began 54 days later on January 22, 2002.

The latest yaw maneuver was on Feb 10, 2025; see a list of all yaws.

SABER: What's New
TIDI: New Wind product
SEE: News
GUVI: New Cal and Data Product

The TIMED spacecraft was launched on December 7, 2001, from Vandenberg Air Force Base, California, aboard a Delta II launch vehicle.

TIMED CELEBRATES 20 YEARS

Click here to learn more

December 7, 2021

TIMED Reaches 20 Years of Studying Earth’s Gateway to Space >

Exactly 20 years ago today, NASA’s TIMED mission launched from the California coast on a journey to unveil new secrets about the upper climes of Earth’s atmosphere. Developed in part by Johns Hopkins APL, the mission’s unrivaled 20-year dataset has provided crucial insights about space weather, Earth’s climate and the evolution of planetary atmospheres.





The TIMED (Thermosphere Ionosphere Mesosphere Energetics and Dynamics) mission is studying the influences of the Sun and humans on the least explored and understood region of Earth's atmosphere - the Mesosphere and Lower Thermosphere/ Ionosphere (MLTI). The MLTI region is a gateway between Earth's environment and space, where the Sun's energy is first deposited into Earth's environment. TIMED is focusing on a portion of this atmospheric region located approximately 40-110 miles (60-180 kilometers) above the surface. + Read More

+ View this and other Science Highlights

•	Read on-line TIMED Publications and view Science Meetings
•	Find time/location matches between your measurements and TIMED's or plan coordinated future observations. data availability
•	Find and download TIMED data via its Science Data System.
•	Check TIMED data availability across the mission.



TIMED is the terrestrial anchor of the Heliophysics System Observatory. Learn more of TIMED's Heliophysics contributions and its role as a bridge to Earth science missions. Link to lessons learned in terrestrial aeronomy. Here are links to additional NASA resources:

•	Science Mission Directorate
	•		Heliophysics
		•	Solar Terrestrial Probes
		•	Living with a Star
•	NASA Science Missions
	•		Heliophysics Missions
•	Heliophysics Data Portal (HDP)
•	Space Physics Data Facility (SPDF)
•	Coordinated Data Analysis Web (CDAWeb)
•	Heliophysics Decadal Survey (HDS)




In 2001 TIMED began its exploration of the least understood region of Earth's atmosphere. Click the videos below to learn what we have discovered about our atmosphere and how it responds to the influences of human activities and the sun. View Video (with Caption) (62.7 MB file) View Video (81.1 MB file)

						Editor: TIMED SDS Manager JHU/APL Official: Linda Butler + Contact JHU/APL View Site Map