WATCH THE SKIES: Satellite trackers predict Russia’s Phobos-Grunt Mars mission will reenter the Earth’s atmosphere on or about Jan. 15, with a more precise forecast possible as it winds down toward the atmosphere. Carrying a Chinese probe piggyback, the 13,200-kg (29,040-lb.) spacecraft was left stranded in low Earth orbit after its Nov. 8, 2011, launch on a Zenit 2-SB rocket. Most of the probe’s liftoff mass was hypergolic fuel that may be frozen, and it carried a sample-return capsule that may survive reentry and reach Earth’s surface.

BELL PICKED: Bell Helicopter has entered final negotiations for the sale of 15 429s to the Turkish National Police, the company reports. The 429 is a new entrant in the light twin-engine helicopter market, and the company sees Turkey’s selection “as a significant win in the European market.”

LUKEWARM WELCOME: Just in time to help carry out new defense priorities and changes that the White House and Pentagon announced last week, the four-star chief of the National Guard has taken his seat on the Joint Chiefs of Staff. The move marks the first significant change to the Joint Chiefs since the Goldwater-Nichols Act of 1986, and brings full and equal Joint Chiefs representation to a part-time element of the military that not only is not a free-standing armed service, but is also shared with state governors. The move caps a decade-long effort.

GERMAN ARMOR: The German army will not see any cuts in its 765 Fuchs (Fox) armored personnel carriers, 175 of which are being upgraded to the A8 standard. In addition to the improved ballistic protection and new axles able to support nine tons of the Fuchs 1A7, the Fuchs 1A8 features further improvements in ballistic and mine protection and adds protection from improvised explosive devices, both blast and explosively formed projectiles. By the end of 2011, 88 Fuchs 1A8s had been delivered by Rheinmetall.

HOUSTON — An emerging space environmental movement finds a new forum in “Space Junk 3D,” a new documentary that dramatically illustrates the collision threat posed by the accumulation of manmade space debris to Earth-orbiting satellites offering a range of services all too often taken for granted. Those include cell, smart phone and broadcast communications, weather forecasting and GPS navigation data, not to mention vital but less visible support for national security.

The past year has seen a lot of turbulence in the stock market, but there have been a few bright spots for investors in aerospace and defense companies. Shares in suppliers of aerospace components fared particularly well in 2011 as Airbus and Boeing ramped up output, and soaring order numbers added to the airframers’ already bulging backlogs.

Tight budgets and other factors have left the U.S. facing “serious gaps” in its ability to monitor the Earth’s climate from space, both for near-term forecasting and for tracking longer-term changes, a panel of the National Research Council has found.

PARIS — Years have ticked by since European launch consortium Arianespace turned a profit. Despite Europe’s economic crisis, the market for commercial satellite communications is strong and conditions for launch providers are generally favorable. Yet the Evry, France-based launch services company continues to rely on government subsidies.