Posts Tagged satellite
Wait for it………. Now run!!!!! 6-Ton Satellite Is About To Hit The Earth!
Posted by Val in Satellites, Space and Satellites on September 22, 2011
Is it true?
Unfortunately, yes. It is true. NASA’s massive dead satellite UARS (The Upper Atmosphere Research Satellite) is on its way, freefalling towards The Earth.
What is it?
The Upper Atmosphere Research Satellite (UARS) is an orbital observatory whose mission was to study the Earth’s atmosphere, particularly the protective ozone layer. The 5,900-kilogram satellite was deployed from Space Shuttle Discovery during the STS-48 mission in September 1991. UARS entered orbit on 15 September 1991 at an operational altitude of 600 kilometers, with an orbital inclination of 57 degrees.
The original mission duration was to be only three years, but in June 2005, 14 years after the satellite’s launch, six of its ten instruments were still operational. UARS was decommissioned in 2005, and a final orbit-lowering burn was performed, followed by the passivation of the satellite’s systems, in early December 2005. On October 26, 2010, the International Space Station performed a debris-avoidance maneuver in response to a conjunction with UARS.
When will it hit?
The satellite is expected to fall from orbit during the afternoon of September 23, 2011, plus or minus a day, according to NASA.
Where will it hit?
UARS will re-enter the atmosphere somewhere between 57 degrees north and 57 degrees south. That means the nearly 6-ton craft will hit the Earth’s atmosphere anywhere from northern Canada to southern South America.
NASA estimates the debris footprint will be about 500 miles (804 kilometers) long.
What do we do?
The word from NASA is direct: “If you find something you think may be a piece of UARS, do not touch it. Contact a local law enforcement official for assistance.”
For now, let’s buckle up and wait. The Earth is three-fourths oceans and the odds of a harmless splashdown are good!
Should the world leaders go into space?
Posted by Val in General, Space and Satellites on August 4, 2011
“Yes, they should”- says astronaut Scott Parazynski. There have been about 515 human beings that have seen their planet from space and every single one of them states that the experience changes your life forever. With NASA Shuttle Program closing the future of human space travel has been turned over to the private companies. The most prominent of them are SpaceX, Blue Origin, Sierra Nevada Corp. and Boeing. This makes a possibility of going up in space quite attainable for everybody. As a matter of fact, there is a contest that was announced in celebration of Seattle’s Space Needle that one can enter and win a chance to go into suborbit. Space Adventures Company will be responsible for designing a vehicle to take the winner of the Space Needle contest into space. The estimated price of the vehicle is $110,000. You can find the details on how to register here.
More importantly, if you were one of the lucky few, what would you see?
You can see on planet Earth is the sunrise or sunset which happens 16 times a day when you’re going around the Earth at 17,500 miles an hour, one orbit every 90 minutes, so half of that time you’re in sunlight and half you’re in darkness.
You see the sun rise from behind the earth and the full spectrum of light.
You come to realize that we are much closer to both our friends and those we call enemies than we think we are and humanity might be better served if we realized that, in the end, we’re all neighbors and perhaps, more importantly, members of the same human family.
While romantic phrases like the endless oceans sound nice on paper, the Earth is a very finite and relatively small world and the things we do have the power to affect it profoundly.
You can find more info here.
What do you think? Please comment below…
1,235 planets found by Kepler Telescope!
Posted by Jim in Space and Satellites on February 3, 2011
54 of them are in habitable zones of stars that are cooler then the Sun and temperatures could allow for existence of liquid water. This is exciting news considering that this report comes from the data collected by Kepler satellite within first four month of the 3.5 year project. Scientist predict that they will eventually find Earth-like planets.
ATI Features World Class Instructors for Our Short Courses
Posted by admin in & SIGNAL PROCESSING, ANALYSIS, Analysis and Signal Processing, Continuing Education and Seminar Marketing, Defense, Including Radar, Missiles and EW, ENGINEERING, General, Satellites, Space and Satellites, Systems Engineering and Project Management, Underwater Acoustics and Sonar, Unmanned Aerial Systems (UAS) or Unmanned Aerial Vehicles (UAV), unmanned aircraft systems (UAS) on November 30, 2010
and onsite technical training
The short technical courses from the Applied Technology Institute (ATI) are designed to help you keep your professional knowledge up-to-date. Our courses provide a practical overview of space and defense technologies which provide a strong foundation for understanding the issues that must be confronted in the use, regulation and development such complex systems.
The classes are designed for individuals involved in planning, designing, building, launching, and operating space and defense systems. Whether you are a busy engineer, a technical expert or a project manager, you can enhance your understanding of complex systems in a short time.
ABOUT ATI AND THE INSTRUCTORS
Our mission here at the ATI is to provide expert training and the highest quality professional development in space, communications, defense, sonar, radar, and signal processing. We are not a one-size-fits-all educational facility. Our short classes include both introductory and advanced courses.
ATI’s instructors are world-class experts who are the best in the business. They are carefully selected for their ability to clearly explain advanced technology.
For example:
Robert Fry worked from 1979 to 2007 at The Johns Hopkins University Applied Physics Laboratory where he was a member of the Principal Professional Staff. He is now working at System Engineering Group (SEG) where he is Corporate Senior Staff and also serves as the company-wide technical advisor. Throughout his career he has been involved in the development of new combat weapon system concepts, development of system requirements, and balancing allocations within the fire control loop between sensing and weapon kinematic capabilities. He has worked on many aspects of the AEGIS combat system including AAW, BMD, AN/SPY-1, and multi-mission requirements development. Missile system development experience includes SM-2, SM-3, SM-6, Patriot, THAAD, HARPOON, AMRAAM, TOMAHAWK, and other missile systems.
Robert teaches ATI’s Combat Systems Engineering course
Wayne Tustin has been president of Equipment Reliability Institute (ERI), a specialized engineering school and consultancy he founded in Santa Barbara, CA, since 1995. His BSEE degree is from the University of Washington, Seattle. He is a licensed Professional Engineer in the State of California. Wayne’s first encounter with vibration was at Boeing/Seattle, performing what later came to be called modal tests, on the XB-52 prototype of that highly reliable platform. Subsequently he headed field service and technical training for a manufacturer of electrodynamic shakers, before establishing another specialized school on which he left his name.
Based on over 50 years of professional experience, Wayne has written several books and literally hundreds of articles dealing with practical aspects of vibration and shock measurement and testing.
Wayne teaches ATI’s Fundamentals of Random Vibration & Shock Testing course.
Thomas S. Logsdon, M.S
For more than 30 years, Thomas S. Logsdon, M. S., has worked on the Navstar GPS and other related technologies at the Naval Ordinance Laboratory, McDonnell Douglas, Lockheed Martin, Boeing Aerospace, and Rockwell International. His research projects and consulting assignments have included the Transit Navigation Satellites, The Tartar and Talos shipboard missiles, and the Navstar GPS. In addition, he has helped put astronauts on the moon and guide their colleagues on rendezvous missions headed toward the Skylab capsule. Some of his more challenging assignments have centered around constellation coverage studies, GPS performance enhancement, military applications, spacecraft survivability, differential navigation, booster rocket guidance using the GPS signals and shipboard attitude determination.
Tom Logsdon has taught short courses and lectured in thirty one different countries. He has written and published forty technical papers and journal articles, a dozen of which have dealt with military and civilian radionavigation techniques. He is also the author of twenty nine technical books on various engineering and scientific subjects. These include Understanding the Navstar, Orbital Mechanics: Theory and Applications, Mobile Communication Satellites, and The Navstar Global Positioning System.
Courses Mr. Logsdon teaches through ATI include:
Fundamentals of Orbital & Launch Mechanics
GPS Technology – Solutions for Earth & Space and
Strapdown Inertial Navigation Systems
COURSE OUTLINE, SAMPLERS, AND NOTES
Determine for yourself the value of our courses before you sign up. See our samples (See Slide Samples) on some of our courses.
Or check out the new ATI channel on YouTube.
After attending the course you will receive a full set of detailed notes from the class for future reference, as well as a certificate of completion. Please visit our website for more valuable information.
DATES, TIMES AND LOCATIONS
For the dates and locations of all of our short courses, please access the links below.
Sincerely,
The ATI Courses Team
P.S. Call today for registration at 410-956-8805 or 888-501-2100 or access our website at www.ATIcourses.com. For general questions please email us at ATI@ATIcourses.com.
As the Sun Awakens, NASA Keeps a Wary Eye on Space Weather
Posted by Markutus in Satellites, Space and Satellites on June 14, 2010
This is something to watch for…
http://science.nasa.gov/science-news/science-at-nasa/2010/04jun_swef/
M
If you enjoyed this information:
Space Solar Power – EADS plans to launch a test satellite with solar panels.
Posted by Val in ENGINEERING, Space and Satellites on January 27, 2010
It is a known fact that alternative energy sources — coal, oil shale, ethanol, wind and ground-based solar — are either of limited potential, very expensive, require huge energy storage systems or harm the environment. There is, however, one potential future energy source that is environmentally friendly, has essentially unlimited potential and can be cost competitive with any renewable source: space solar power.
A space solar power system would involve building large solar energy collectors in orbit around the Earth. These panels would collect far more energy than land-based units, which are hampered by weather, low angles of the sun in northern climes and, of course, the darkness of night.
Once collected, the solar energy would be safely beamed to Earth via wireless radio transmission, where it would be received by antennas near cities and other places where large amounts of power are used. The received energy would then be converted to electric power for distribution over the existing grid.
Watch this video to see STRATFOR’s founder and CEO, George Friedman, discuss the push for space-based energy infrastructure after EADS, Europe’s largest space company, announces plans to launch a test satellite with solar panels.
GEO Satellite question
Posted by Lisa in Satellites on November 18, 2009
Freddy posed the following question to Dr. Robert A. Nelson:
Dear Dr. Nelson: I understand that GEO satellites are 2 degree appart in its orbital position. How is possible that some satellites ( Telstar 11N and NSS 10 located at 37.5W; Astra 2C and 1D at 31.5 E) occupied the same orbital position ?. Could you please, help me to understand this ?.
Thank you Dr. Nelson.
Dr. Nelson responded as follows:
The two-degree spacing requirement applies to satellites that use the same
frequencies at C-band or Ku-band. Interference is avoided through the use
of highly directional Earth Station antennas, although there is inevitably
some adjacent satellite interference, with a C/I typically around 22 dB.
Satellites that share the same orbital slot use different frequency bands
and sometimes also different polarizations. For example, at 101 degrees WL,
there are several satellites, including an SES Americom C/Ku-band satellite,
an MSAT L-band satellite, and three or four DirectTV satellites that use a
special portion of Ku-band for DBS and also use different polarizations.
These satellites are separated by only about 0.02 degrees, or about 15
kilometers. Very exact stationkeeping must be maintained.
Dr. Nelson’s Satellite Communication Systems Engieering course is next scheduled December 8-10, 2009 in Beltsville, MD.
IP Networking Over Satellite Acronyms
Posted by Lisa in Space and Satellites on August 5, 2009
Additonal Acronyms
ABS - Accounting and Billing Server
ARP - Address Resolution Protocol
CRTT - Compressed Real Time Transport Protocol
CS-ACELP - Conjugate-Structured Algebraic Code-Excited Linear Prediction
CTP - Circuit to Packet
DAS - Direct Access System
DCM - Dynamic Coding and Modulation
DVP - Distance Vector Protocol
FEC - Forward Error Correction
FH - Frame Header
FT - Frame Trailer
IANA - Internet Address Naming Association
IKE - Internet Key Exchange
IPH - IP Header
IS-IS - Intermediate System to Intermediate System
LSP - Link State Protocol
MIB - Management Information Base
MOS - Mean Opinion Score
OC - Optical Carrier
PPP - Point to Point Protocol
RAS - Remote Access System
RED - Random Early Detection
RTCP - Real Time Control Protocol
SIP - Session Initiation Protocol
TCPH - TCP Header
TIPH - Tunnel Internet Protocol Header
VAD - Voice Activity Detection
IP Networking Over Satellite taught by Burt H. Liebowitz was held on July 20-22, 2009 in Laurel, MD and was very well reviewed by all. One attendee, Dennis Almer, supplied the preceding acronyms to complement the course.
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