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4 mars 2015 3 04 /03 /mars /2015 17:20
Un satellite militaire américain explose après "une soudaine hausse de température"

Defense Meteorological Satellite Program (DMSP) - photo LM

 

04/03/2015 Par Victor Garcia - lexpress.fr

 

Alors qu'il se trouvait en orbite autour de la Terre, un satellite de l'US Air Force, a explosé, laissant derrière lui une cinquantaine de débris. Les premiers rapports pointent du doigt un dysfonctionnement des batteries. Mais d'autres théories émergent.

 

Il avait 20 ans, et s'appelait DMSP-F13. Mais ce satellite météorologique de l'US Air Force a terminé sa vie dans une tragique explosion, laissant derrière lui un champ d'au moins 46 débris. En cause: une "soudaine hausse de la température", apparemment provoquée par un dysfonctionnement des batteries, selon un astrophysicien de CelesTrak, qui se charge de "traquer les éléments orbitaux". 

L'incident s'est produit le 3 février dernier, mais n'a été rapporté par le commandement de l'armée de l'air que le 27 du même mois. "La soudaine hausse de température a été suivie par une baisse d'altitude incontrôlable", a expliqué l'organe militaire américain. Et alors que les techniciens essayaient de "sécuriser l'appareil" en désactivant tous les systèmes non-essentiels, les radars des militaires ont alors détecté "un champ de débris autour du satellite". 

 

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3 avril 2014 4 03 /04 /avril /2014 11:20
U.S. Air Force Ready to Launch Weather Satellite Built By Lockheed Martin

 

 

VANDENBERG AIR FORCE BASE, CALIF., April 2, 2014 – Lockheed Martin

 

DMSP Satellite Inserts New Capability in Constellation Significantly Outliving Design Life

 

The next Defense Meteorological Satellite Program (DMSP) satellite built by Lockheed Martin [NYSE: LMT] is ready for liftoff April 3 from Space Launch Complex 3 East at Vandenberg Air Force Base, Calif. The launch window will open at 7:46 a.m. PDT.

 

DMSP satellites collect data that enables military forecasters to find, track and forecast weather systems all over the globe, particularly in remote and hostile areas for deployed troops. Additionally, DMSP supports a broad range of civil users with sensing capabilities not provided by U.S. civil and international weather satellite systems.

 

“We’ve delivered more than 40 DMSP satellites over 50 years, so this launch represents a long partnership in monitoring and predicting weather,” said Sue Stretch, DMSP program director at Lockheed Martin. “I congratulate the entire Air Force-industry team that designed, built and tested this satellite, which is ready to serve our military and civil users.”

 

DMSP satellites fulfill the country’s most critical requirements for global atmospheric, oceanic, terrestrial and space environment information. DMSP-19 is the fourth Block 5D-3 version to be launched, and Lockheed Martin has produced more than 40 satellites throughout the program’s 50-year history. Many of the satellites are performing beyond their design life, so adding on-orbit capability is important for reliable weather information.

 

The approaching launch is the first in five years for DMSP. The previous one was October 18, 2009, when DMSP-18 joined the constellation. The DMSP program is led by the U.S. Air Force Space and Missile Systems Center at Los Angeles Air Force Base, Calif., and control is provided by a joint team of the U.S. Air Force and the National Oceanic and Atmospheric Administration in Suitland, Md. All DMSP satellites were integrated and tested at the Lockheed Martin Space Systems facility in Sunnyvale, Calif.

 

Headquartered in Bethesda, Md., Lockheed Martin is a global security and aerospace company that employs approximately 115,000 people worldwide and is principally engaged in the research, design, development, manufacture, integration and sustainment of advanced technology systems, products and services. The Corporation’s net sales for 2013 were $45.4 billion.

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