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 | The THEMIS mission uses a constellation of five NASA satellites to study energy releases from Earth's magnetosphere known as substorms, magnetic phenomena that intensify auroras near Earth's poles. The name of the mission is an acronym for Time History of Events and Macroscale Interactions during Substorms.[1] Wikipedia does not have an article with this exact name. ...
ISS in earth orbit. ...
Image File history File links Download high resolution version (3032x2008, 1386 KB) High-resolution imagery of Space Shuttle Discovery as it approaches the International Space Station (28 July 2005) source: http://www. ...
Image File history File linksMetadata Download high-resolution version (3000x2250, 3709 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): THEMIS (satellite) Metadata This file contains additional information, probably added from the digital camera or scanner used to...
Image File history File linksMetadata Download high-resolution version (3000x2250, 3709 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): THEMIS (satellite) Metadata This file contains additional information, probably added from the digital camera or scanner used to...
The National Aeronautics and Space Administration (NASA) is an agency of the United States federal government, responsible for the nations public space program. ...
An Earth observation satellite, ERS 2 For other uses, see Satellite (disambiguation). ...
Adjectives: Terrestrial, Terran, Telluric, Tellurian, Earthly Atmosphere Surface pressure: 101. ...
A magnetosphere is the region around an astronomical object in which phenomena are dominated or organized by its magnetic field. ...
The Aurora Borealis, or Northern Lights, shines above Bear Lake Aurora Borealis as seen over Canada at 11,000m (36,000 feet) Red and green Aurora in Fairbanks,Alaska For other uses, see Aurora (disambiguation). ...
It has been suggested that this article or section be merged with Backronym and Apronym (Discuss) Acronyms and initialisms are abbreviations, such as NATO, laser, and ABC, written as the initial letter or letters of words, and pronounced on the basis of this abbreviated written form. ...
The THEMIS satellites were launched February 17, 2007 from Cape Canaveral Air Force Station Launch Complex 17 aboard a Delta II rocket.[1][2] Each satellite carries identical instrumentation, including a fluxgate magnetometer (FGM), an electrostatic analyzer (ESA), a solid state telescope (SST), a search coil magnetometer (SCM) and an electric field instrument (EFI). Each has a mass of 126 kg, including 49 kg of fuel.[3] February 17 is the 48th day of the year in the Gregorian calendar. ...
2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era. ...
The first stage of the Boeing Delta II rocket, slated to launch NASAs Solar Terrestrial Relations Observatory (STEREO), is lifted into a vertical position for installation into the mobile service tower at Pad 17B Cape Canaveral Air Force Station Launch Complex 17 is a launch site at Merritt Island...
The Delta II family of launch vehicles was designed and built by Boeings Integrated Defense Systems division and has been in service since 1989. ...
A Soyuz rocket, at Baikanur launch pad. ...
A magnetometer is a scientific instrument used to measure the strength and/or direction of the magnetic field in the vicinity of the instrument. ...
A telescope (from the Greek tele = far and skopein = to look or see; teleskopos = far-seeing) is an instrument designed for the observation of remote objects. ...
Launch
 THEMIS, atop a Delta II 7925 rocket, at LC-17B, Cape Canaveral. THEMIS was originally scheduled to launch on 19 October 2006. Owing to delays caused by workmanship problems with Delta II second stages -- an issue that also affected the previous mission, STEREO -- the THEMIS launch was delayed to Thursday, February 15, 2007. Due to weather conditions occurring on Tuesday, February 13th, fueling of the second stage was delayed, and the launch pushed back 24 hours. On February 16, the launch was scrubbed in a hold at the T-4 minute point in the countdown due to the final weather balloon reporting a red, or nogo condition for upper level winds. A 24-hour turnaround procedure was initiated, targeting a new launch window between 23:01 and 23:17 GMT on 17 February. Image File history File links Download high-resolution version (2000x3008, 577 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): THEMIS (satellite) Talk:Delta II ...
Image File history File links Download high-resolution version (2000x3008, 577 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): THEMIS (satellite) Talk:Delta II ...
The Delta II family of launch vehicles was designed and built by Boeings Integrated Defense Systems division and has been in service since 1989. ...
October 19 is the 292nd day of the year (293rd in leap years) in the Gregorian calendar. ...
For the Manfred Mann album, see 2006 (album). ...
This article is about the spacecraft and the mission. ...
For alternate meanings of GMT, see GMT (disambiguation). ...
February 17 is the 48th day of the year in the Gregorian calendar. ...
Favourable weather conditions were observed on 17 February, and the countdown proceeded smoothly. THEMIS successfully launched at 6:01 p.m. EST. The spacecraft separated from the launch vehicle approximately 73 minutes after liftoff. By 8:07 p.m. EST, mission operators at the University of California, Berkeley, commanded and received signals from all five spacecraft, confirming nominal separation status. Image File history File links Download high-resolution version (2008x3000, 311 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): THEMIS (satellite) User talk:Fl295 User talk:GW Simulations/Archive 2007 ...
Image File history File links Download high-resolution version (2008x3000, 311 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): THEMIS (satellite) User talk:Fl295 User talk:GW Simulations/Archive 2007 ...
February 17 is the 48th day of the year in the Gregorian calendar. ...
The launch service was provided by the United Launch Alliance through NASA Launch Services Program (LSP). United Launch Alliance is a joint venture between Boeing and Lockheed Martin. ...
Instruments
 This illustration depicts the individual orbits of NASA's THEMIS spacecraft Aboard the spacecraft:
Image File history File links Size of this preview: 600 × 600 pixels Full resolution (2048 × 2048 pixel, file size: 355 KB, MIME type: image/jpeg) THEMIS Aligned 12. ...
Image File history File links Size of this preview: 600 × 600 pixels Full resolution (2048 × 2048 pixel, file size: 355 KB, MIME type: image/jpeg) THEMIS Aligned 12. ...
- Instrument Data Processing Unit (IDPU): The IDPU houses most of the electronics for the instruments on the THEMIS spacacraft.
- Electric Field Instruments (EFI): The EFI is designed and built to sense the electric field in Earth's ever-changing magnetosphere
- Flux Gate Magnetometer (FGM): The FGM measures the background magnetic field to identify and time the abrupt reconfigurations of the magnetosphere during substorm onset.
- Search Coil Magnetometers (SCM): The SCM measures low frequency magnetic field fluctuations and waves in three directions in Earth's magnetoshpere.
- Electrostatic Analyzer (ESA): The ESA measures thermal electrons and ions to identify and track high-speed flows through the magnetotail and identify pressure pulses.
- Solid State Telescope (SST): The SST measures particle distribution functions.
Ground based:
As the satellites monitor the magnetosphere from orbit, twenty ground stations in North America simultaneously monitor auroras. Ground station mission and science operations are being managed by the University of California Space Sciences Laboratory. An Electrostatic Analyzer or ESA is an instrument used in ion optics that uses electric or magnetic fields to allows passage of ions or electrons of a certain energy, usually focusing them to a smaller area. ...
World map showing North America A satellite composite image of North America. ...
The Aurora Borealis, or Northern Lights, shines above Bear Lake Aurora Borealis as seen over Canada at 11,000m (36,000 feet) Red and green Aurora in Fairbanks,Alaska For other uses, see Aurora (disambiguation). ...
The Space Sciences Laboratory (SSL) is run by the University of California, Berkeley. ...
- Ground-Based All-Sky Imager (ASI) Array: The ground-based All-Sky Imager (ASI) array observes the aurora over the Northern American continent from Canada to Alaska in order to determine where and when the auroral substorm onset occurs.
- Ground-Based Magnetometer (GMAG) Array: The GMAG Measure changes in Earth’s magnetic field near Earth’s surface due to substorm onset to help determine the timing of substorm events.
Swales Aerospace
 THEMIS in Delta II fairing Swales Aerospace (Beltsville, MD) manufactured all five probes for this mission.[4] Each was built-up and tested at the Beltsville facility, before being delivered to the University of California, Berkeley for instrument integration. Swales was responsible for integrating the BAU, IRU, Solar Arrays, Antenna, Battery, and other components necessary for functionality. This was the second major satellite built by Swales, the first being the EO-1 spacecraft, which continues to orbit the Earth. Swales was also responsible for designing and building the Electrical Ground Support Equipment (EGSE) used for monitoring the probes during all phases of pre-launch activities, including use at the launch site. Image File history File links Size of this preview: 398 × 599 pixels Full resolution (2000 × 3008 pixel, file size: 672 KB, MIME type: image/jpeg) Orginal NASA relase to the picture: No copyright protection is asserted for this photograph. ...
Image File history File links Size of this preview: 398 × 599 pixels Full resolution (2000 × 3008 pixel, file size: 672 KB, MIME type: image/jpeg) Orginal NASA relase to the picture: No copyright protection is asserted for this photograph. ...
JPL Testing after the installion of instruments at SSL,Berkeley, including vacuum testing, was done at NASA's Jet Propulsion Laboratory in Pasadena, California.
References February 21 is the 52nd day of the year in the Gregorian calendar. ...
2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era. ...
March 1 is the 60th day of the year in the Gregorian calendar (61st in leap years). ...
2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era. ...
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