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Encyclopedia > TDRS
First Generation TDRS
First Generation TDRS
Second Generation TDRS
Second Generation TDRS

A Tracking and Data Relay Satellite (TDRS) is a one of a network of communications satellites used by NASA and other United States government agencies for communication to satellites or the International Space Station. The system was designed to replace an existing network of ground stations that had supported all of NASA's manned flight missions. The prime design goal was to increase the time spacecraft were in communication with the ground and improve the amount of data that could be transferred. Image File history File links Tdrs1. ... Image File history File links Tdrs1. ... Image File history File links Download high-resolution version (1227x934, 605 KB) Summary Source URL - http://msp. ... Image File history File links Download high-resolution version (1227x934, 605 KB) Summary Source URL - http://msp. ... U.S. military MILSTAR communications satellite A communications satellite (sometimes abbreviated to comsat) is an artificial satellite stationed in space for the purposes of telecommunications. ... NASA logo Listen to this article · (info) This audio file was created from an article revision dated 2005-09-01, and does not reflect subsequent edits to the article. ... International Space Station insignia ISS Statistics Crew: 3 As of July 21, 2006 Perigee: 352. ...


The initial seven satellites were built by TRW; later, three versions have been put together by Boeing's Satellite Systems division. 10 satellites have been launched. 9 satellites are still in service. TRW Incorporated was an American corporation involved in a number of businesses, mostly defense-related, but including automotive supply and credit reporting. ... The Boeing Company (NYSE: BA, TYO: 7661 ) is an aerospace and defense corporation headquartered in Chicago, Illinois. ... Boeing Satellite Systems is a major business unit of Boeing Integrated Defense Systems. ...


The first TDRS was launched in 1983 on the Space Shuttle Challenger's first flight, STS-6. The Boeing-built Inertial Upper Stage that took the satellite from Challenger's orbit to its ultimate geostationary orbit did not deliver to the correct orbit. As a result, the satellite was forced to use its onboard thrusters to get it to the correct orbit. This reduced its operational lifetime, and has since been reduced to part-time duty supporting Antarctic communications. 1983 (MCMLXXXIII) was a common year starting on Saturday of the Gregorian calendar. ... Space Shuttle Challenger (NASA Orbiter Vehicle Designation: OV-099) was NASAs second Space Shuttle orbiter to be put into service, after Columbia. ... STS-6 was a space shuttle mission by NASA using the Space Shuttle Challenger, launched April 4, 1983. ... This rocks! ... A geostationary orbit (abbreviated GEO) is a circular orbit in the Earths equatorial plane, any point on which revolves about the Earth in the same direction and with the same period as the Earths rotation. ...


The second was lost on the Challenger's 10th mission when it was destroyed with the Challenger shortly after liftoff on STS-51-L in 1986. The next five were launched on other shuttles. The three Boeing-built successors were launched on Atlas rockets in 2000 and 2002. A NASA press release summarized the capabilities of the system as a whole: The launch of the Space Shuttle Challenger on mission 51L/STS-33, the 25th of the STS (Space Transportation System) program, began at an estimated time of 16:38:00. ... 1986 (MCMLXXXVI) was a common year starting on Wednesday of the Gregorian calendar. ... Mercury Atlas 9 rocket and capsule on pad The Atlas is a venerable line of space launch vehicles built by Lockheed Martin. ... This article is about the year 2000. ... For album titles with the same name, see 2002 (album). ...

"Working solo, TDRS-1 provided more communication coverage, in support of the September 1983 Shuttle mission, than the entire network of NASA tracking stations had provided in all previous Shuttle missions."

The communications systems on the TDRS satellites were designed to support multiple missions at the same time. Each satellite has S-band, Ku-band, and Ka-band systems which support multiple data-rates. The newer Boeing satellites are able to support more communications than the older TRW-built satellites. The S band ranges from 2. ... This article or section contains information that has not been verified and thus might not be reliable. ... The Ka band (kurz-above band) is a portion of the K band of the microwave band of the electromagnetic spectrum. ...

Contents


Satellite variants

TDRS-G at Kennedy Space Center
Enlarge
TDRS-G at Kennedy Space Center
  • First Generation TDRS
  • Second Generation TDRS

Image File history File links Download high-resolution version (525x768, 108 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): STS-70 TDRS ... Image File history File links Download high-resolution version (525x768, 108 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): STS-70 TDRS ...

Launch history

  • TDRS A was launched April 4, 1983 on STS-6
  • TDRS B was destroyed January 28, 1986 on STS-51-L (see Space Shuttle Challenger disaster for reason)
  • TDRS C was launched September 29, 1988 on STS-26
  • TDRS D was launched March 13, 1989 on STS-29
  • TDRS E was launched August 2, 1991 on STS-43
  • TDRS F was launched January 13, 1993 on STS-54
  • TDRS G, the replacement for the lost TDRS B, was launched July 13, 1995 on STS-70
  • TDRS H, the first Boeing-built craft, was launched January 20, 2000 on an Atlas IIa
  • TDRS I was launched on March 8, 2002 on an Atlas IIa
  • TDRS J was launched on December 10, 2002 on an Atlas IIa

1983 (MCMLXXXIII) was a common year starting on Saturday of the Gregorian calendar. ... STS-6 was a space shuttle mission by NASA using the Space Shuttle Challenger, launched April 4, 1983. ... 1986 (MCMLXXXVI) was a common year starting on Wednesday of the Gregorian calendar. ... The launch of the Space Shuttle Challenger on mission 51L/STS-33, the 25th of the STS (Space Transportation System) program, began at an estimated time of 16:38:00. ... An iconic image of the accident. ... 1988 (MCMLXXXVIII) was a leap year starting on Friday of the Gregorian calendar. ... STS-26 was a space shuttle mission by NASA using the Space Shuttle Discovery. ... 1989 (MCMLXXXIX) was a common year starting on Sunday of the Gregorian calendar. ... Crew Michael L. Coats (2), Commander John E. Blaha (1), Pilot James P. Bagian (1), Mission Specialist 1 James F. Buchli (3), Mission Specialist 2 Robert C. Springer (1), Mission Specialist 3 Mission Parameters Mass: Orbiter Liftoff: 116,281 kg Orbiter Landing: 88,353 kg Payload: 17,280 kg Perigee... 1991 (MCMXCI) was a common year starting on Tuesday of the Gregorian calendar. ... STS-43 was a NASA space shuttle mission in 1991. ... 1993 (MCMXCIII) was a common year starting on Friday of the Gregorian calendar and marked the Beginning of the International Decade to Combat Racism and Racial Discrimination (1993-2003). ... Crew John H. Casper (2), Commander Donald R. McMonagle (2), Pilot Mario Runco, Jr. ... 1995 (MCMXCV) was a common year starting on Sunday of the Gregorian calendar. ... The STS-70 is a Space Shuttle program mission. ... This article is about the year 2000. ... Mission Atlas II is a member of the Atlas family of launch vehicles, which evolved from the successful Atlas intercontinental ballistic missile (ICBM) program. ... For album titles with the same name, see 2002 (album). ... For album titles with the same name, see 2002 (album). ...

References

External links

  • NASA's Goddard Space Flight Center TDRSS page
  • NASA's TDRSS program overview page

  Results from FactBites:
 
John F. Kennedy Space Center - TDRS:  Tracking and Data Relay Satellite System (417 words)
The TDRS concept was conceived following early 1970s studies which showed that a system of orbiting telecommunications satellites, operated from a single ground terminal link, could more effectively support Space Shuttle, scientific and other NASA mission requirements than the nearly 25-year-old tracking and communications network of ground stations located worldwide.
The full TDRS constellation enables spacecraft to communicate with Earth for about 85 to 100 percent of the orbit, depending on their altitude.
A fifth TDRS spacecraft, TDRS-F, is slated for launch in early 1993.
COMMUNICATIONS (3945 words)
The TDRS system was developed after studies in the early 1970s showed that a telecommunication satellite system could support the projected scientific and application mission requirements better than ground stations and also could halt the spiraling cost of upgrading and operating a worldwide network of tracking and communication ground stations.
TDRS-A and its IUS were carried aboard the space shuttle Challenger on the April 1983 STS-6 mission.
TDRS-B, C and D are identical to TDRS-A except for modifications to correct the malfunctions that occurred in TDRS-A and a modification of the C-band antenna feeds.
  More results at FactBites »

 
 

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