From Aviation Week and Space Technology 2009 February

Satellite operators are at risk of a loss to orbital debris like the one experienced by Iridium Satellite LLC last week about twice a decade, and the danger grows every time there is another collision involving orbiting objects.

The collision between an operational Iridium communications satellite and an old Russian military store-and-dump satcom bird was the first between intact spacecraft. But it was the fourth known accidental collision between man-made space objects since 1991, and "it was by far the most severe," says Nicholas Johnson, who monitors orbital debris at NASA's Johnson Space Center.

The Iridium 33 satellite - one of 66 in the "Big LEO" low Earth orbit satcom constellation - and the 16-year-old Russian Cosmos 2251 - a Stela-2M communications spacecraft - collided broadside over northern Siberia with a closing velocity of about 7 mi. per second shortly before 5 p.m. GMT (noon EST) Feb. 10 at an altitude of about 790 km. (491 mi.).

Both spacecraft - the 800-kg. (1,764-lb.) Cosmos and the 689-kg. Iridium - shattered into debris clouds that continued on the paths of their respective circular orbits, spreading out along the original directions of flight and extending upward and down into a region of space heavily used by civilian and military weather satellites and other Earth-observation spacecraft.

Among them is the U.S. ? ?NOAA-N Prime spacecraft just launched into an 860-km. orbit (see p.

Read Full Article at AviationWeek.com
View Table of Contents
© 2017 McGraw-Hill Companies, Inc. (The)

Products & Services
Satellites
Satellites are manmade objects placed in orbit above the Earth for a variety of civil, scientific, and military applications, such as communications, environmental monitoring, navigation, and reconnaissance.
GPS Chips and Modules

GPS chips and modules compare signals from several geo-positioning satellites to determine position on the Earth's surface. GPS is an initialism for global positioning system.

GPS Instruments and Devices
Global positioning system (GPS) instruments and GPS devices are radio-navigational devices that provide accurate position information about objects on Earth, based on information from orbiting satellites.
Collision Avoidance Sensors
Collision avoidance sensors use various types of proximity sensors to detect the presence of an object or obstruction.
Distress Radiobeacons

Distress radiobeacons, also known as emergency beacons, PLBs, ELTs, or EPIRBs, are devices that transmit the location of boats, aircraft, and people in an emergency. The signal is forwarded via a dedicated satellite to a control center that mobilizes a rescue response.


Product Announcements
FARO - NASA Uses FARO Laser Scanner
Discover how Houston engineering firm, Taylor and Hill Inc., used the FARO Laser Scanner LS to scan and model Johnson Space Center's environmental simulation test Chamber A, enabling NASA to make... (read more)
Nye Lubricants, Inc. - Nye Lubricants, Inc. - Aerospace Lubricants
Nye Lubricants has been designing high-quality, synthetic lubricants for leaders in the aerospace industry for more than 30 years. Our scientists and engineers focus... (read more)
Integrity Testing Laboratory Inc. - The Space Environment Simulator (SES) Sevices
The Space Environment Simulator (SES) is a modern fully computerized experimental facility designed and created at ITL Inc. for testing, qualification, and lifetime prediction of spacecraft materials... (read more)
PIC Wire & Cable - Commercial Aircraft Cable Solutions
PIC Wire & Cable provides aircraft cable solutions for new , maintenance, retrofit and engineering/kitting customers. By consistently delivering the best overall value in network cables, data... (read more)
PIC Wire & Cable - Commerical Aircraft Cables
PIC Wire & Cable provides aircraft cable solutions for new , maintenance, retrofit and engineering/kitting customers. By consistently delivering the best overall value in network cables, data... (read more)
Integrity Testing Laboratory Inc. - Space Environment Accelerated Tester
The Space Environment Simulator (SES) is a modern fully computerized experimental facility designed and created at ITL Inc. for testing, qualification, and lifetime prediction of spacecraft materials... (read more)
Suntron Corporation - Aerospace Manufacturing Capabilities
Suntron is an industry leader in providing best-in-class technologies and superior manufacturing capabilities to many of the world's top companies in the Aerospace sector. (read more)
Suntron Corporation - Delivering Quality Manufacturing Solutions
Suntron is an industry leader in providing best-in-class technologies and superior manufacturing capabilities to many of the world's top companies in the Aerospace sector. With AS9100/NADCAP certified... (read more)

Topics of Interest

Satellite operators are at risk of a loss to orbital debris like the one experienced by Iridium Satellite LLC last week about twice a decade, and the danger grows every time there is another collision...

Chinese delegates will have some explaining to do in Vienna later this month, when they sit down with representatives of other spacefaring nations to adopt international guidelines designed to...

U.S. military officials say they expect to have enough personnel and new computing power in place by October to warn U.S. and foreign satellite operators of possible collision hazards to their roughly...

The Cosmos-1 solar sail spacecraft most likely was lost shortly after launch June 21 due to a rocket failure, although a few weak signals received at ground stations are prompting scientists to hold...

Chapter List Chapter 14: Orbital Debris Chapter 15: Collision Avoidance and Radio Frequency Interference Chapter 16: Ground Systems and Launch Operations Chapter 17: Spacecraft Mission Operations...

Product Announcements
Accurate Bushing Company, Inc.
National Precision Bearing, Inc.