Featured Research

from universities, journals, and other organizations

Instrument Integration Begins On New Atmospheric Spacecraft

Date:
June 10, 1999
Source:
Johns Hopkins University
Summary:
A spacecraft to conduct a global study of a critical region in Earth's atmosphere is taking shape at The Johns Hopkins University Applied Physics Laboratory.

A spacecraft to conduct a global study of a critical region in Earth's atmosphere is taking shape at The Johns Hopkins University Applied Physics Laboratory (JHU/APL) in Laurel, Md. The mission, known as TIMED (Thermosphere, Ionosphere, Mesosphere, Energetics and Dynamics), will study 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 TIMED spacecraft will be boosted into its 625-kilometer circular orbit aboard a Delta II 7920-10 launch vehicle from Vandenberg Air Force Base, Calif., in May 2000.

The two-year TIMED mission will focus on the portion of Earth's atmosphere located between 60 and 180 kilometers (40-110 miles) above the surface, where the solar X-ray and ultraviolet radiation (the most variable part of the solar spectrum) is absorbed. "We will examine the entire region as a whole: its basic structure and thermal balance, how the mesosphere is coupled to the thermosphere/ionosphere, how the MLTI region is coupled to space and the lower atmosphere below, and how energy is transported from one altitude or latitude to another," says JHU/APL's Sam Yee, project scientist for the mission. "We will gain a better understanding of the dynamics of this gateway region and its effects upon communications, satellites, and spacecraft reentering Earth's atmosphere," adds JHU/APL's Larry Paxton, project scientist for one of the TIMED instruments.

Previous studies of this region have been limited because it is difficult to reach. "This atmospheric region is too high for balloons to reach," says JHU/APL's Glen Cameron, mission systems engineer for the TIMED project, "and ground-based instruments can only see a small part of the atmosphere over the observation site. Rockets flown into the region can only provide local snapshots of its activity."

But with technological advances in remote sensing, TIMED will be able to observe this relatively unexplored frontier from space, obtaining an unprecedented set of comprehensive global measurements of the MLTI region's temperature, pressure, winds, and chemical composition, along with the energy inputs and outputs.

Integration of TIMED's four-instrument payload has begun with the Global Ultraviolet Imager (GUVI), a collaborative effort between JHU/APL and The Aerospace Corporation in El Segundo, Calif. The GUVI instrument will measure composition and temperature profiles of the MLTI region, as well as the high-latitude auroral energy inputs.

TIMED's three other instruments are being built by organizations from around the country and will be integrated over the course of the next few months. The Solar Extreme Ultraviolet Experiment (SEE) instrument, being built by the University of Colorado, will measure solar X-ray, ultraviolet, and far ultraviolet radiation -- the primary energy source of the MLTI region. The Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) instrument, being developed and built by Hampton University and Utah State University for NASA's Langley Research Center, will measure atmospheric cooling rates, as well as pressure, temperature, and chemical constituents. The TIMED Doppler Interferometer (TIDI) instrument, being constructed at the University of Michigan, will measure the region's winds and temperature profiles.

The TIMED spacecraft will be the initial launch in NASA's Solar Terrestrial Probe Program, part of NASA's initiative to lower mission costs and provide more frequent access to space. The TIMED program is cost-capped at approximately $130 million (FY99 dollars) with a maximum three-year development cycle.

TIMED is sponsored by NASA Headquarters, Office of Space Science, Washington, D.C., and is managed by NASA's Goddard Space Flight Center, Greenbelt, Md. The mission operations and science data centers, located at JHU/APL, will support data analysis for an additional two years after the conclusion of the mission.

For more information about the TIMED mission (including instrument integration photographs), visit the TIMED web site, or contact one of the public relations representatives listed above.

*******

The Applied Physics Laboratory (APL) is a not-for-profit laboratory and independent division of The Johns Hopkins University. APL conducts research and development primarily for national security and for nondefense projects of national and global significance. APL is located midway between Baltimore and Washington, D.C., in Laurel, Md.


Story Source:

The above story is based on materials provided by Johns Hopkins University. Note: Materials may be edited for content and length.


Cite This Page:

Johns Hopkins University. "Instrument Integration Begins On New Atmospheric Spacecraft." ScienceDaily. ScienceDaily, 10 June 1999. <www.sciencedaily.com/releases/1999/06/990609173938.htm>.
Johns Hopkins University. (1999, June 10). Instrument Integration Begins On New Atmospheric Spacecraft. ScienceDaily. Retrieved September 20, 2014 from www.sciencedaily.com/releases/1999/06/990609173938.htm
Johns Hopkins University. "Instrument Integration Begins On New Atmospheric Spacecraft." ScienceDaily. www.sciencedaily.com/releases/1999/06/990609173938.htm (accessed September 20, 2014).

Share This



More Earth & Climate News

Saturday, September 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Climate Change Rally Held in India Ahead of UN Summit

Climate Change Rally Held in India Ahead of UN Summit

AFP (Sep. 20, 2014) Some 125 world leaders are expected to commit to action on climate change at a UN summit Tuesday called to inject momentum in struggling efforts to tackle global warming. Duration: 00:41 Video provided by AFP
Powered by NewsLook.com
New Music With Recycled Instruments at Colombia Fest

New Music With Recycled Instruments at Colombia Fest

AFP (Sep. 19, 2014) Jars, bottles, caps and even a pizza box, recovered from the trash, were the elements used by four musical groups at the "RSFEST2014 Sonorities Recycling Festival", in Colombian city of Cali. Duration: 00:49 Video provided by AFP
Powered by NewsLook.com
Raw: Wildfires in CA Burn Forest Asunder

Raw: Wildfires in CA Burn Forest Asunder

AP (Sep. 18, 2014) An out-of-control Northern California wildfire has nearly 2,800 people from their homes as it continues to grow, authorities said Thursday. Authorities said a man has been arrested on suspicion of arson for starting the fire on Saturday. (Sept. 18) Video provided by AP
Powered by NewsLook.com
Raw: Elephant Undergoes Surgery in Tbilisi Zoo

Raw: Elephant Undergoes Surgery in Tbilisi Zoo

AP (Sep. 18, 2014) Grand the elephant has successfully undergone surgery to remove a portion of infected tusk at Tbilisi Zoo in Georgia. British veterinary surgeons used an electric drill to extract the infected piece. (Sept. 18) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins