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Explore the people, places, events, achievements, struggles and stories that shaped our journey.
Movements, leaders, victories and the continuing fight for equality.
Innovation, patents, science, technology and world-changing contributions.
Pioneers, champions, Negro Leagues, records, activism and excellence.
Meet the people whose lives, choices and achievements shaped the journey.
Black towns, communities, institutions and places where history happened.
Moments that changed communities, movements, institutions and the nation.
Wilmington, North Carolina once had a thriving Black middle class and an elected interracial government. In 1898 white supremacists used violence to overthrow that government, kill Black residents and drive many others from the city.
MORE →Reflects the personal views, recollections, and perspective of the author, Mike Davis.
This is a personal recollection on the Move fire on May 13, 1985
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The Micro-satellite Technology Experiment (MiTEx) is a microsatellite-based mission launched into geosynchronous orbit 21 June 2006 aboard a Delta II rocket. The USAF described the mission as a joint "technology demonstration" mission for the Defense Advanced Research Projects Agency (DARPA), the United States Air Force (USAF) and the United States Navy (US Navy).[1][2]
MiTEx consists of three spacecraft; two inspection satellites, designated USA-187 and USA-188, and an experimental upper stage, designated USA-189.[3] The two inspection satellites were initially used to inspect each other; however, they were later used to inspect DSP-23, a failed missile detection satellite, to find out why it stopped operating.[4]
The MiTEx goal was to demonstrate technologies such as lightweight power and propulsion systems, avionics, structures, commercial off-the-shelf components, advanced communications, and on-orbit software environments.[5]
MiTEx was developed with funding from the Microsatellite Demonstration Science and Technology Experiment Program (MiDSTEP). Funding for MiDSTEP (and thus MiTEx) is allocated to DARPA through the "Space Programs and Technology" element of the United States Department of Defense (DoD) "Advanced Technology Development" budget item. DoD budget documents from February 2008 show costs of MiDSTEP in 2007 of US$8 million, in 2008 of US$10 million, and in 2009 of US$8 million.[6] Owen C. Brown was the program manager for the design, integration, test, launch, and demonstration of MiTEx, while he was a program manager in the Tactical Technology Office (TTO) at DARPA.[7]
The satellites were launched from Cape Canaveral Space Launch Complex 17 on 21 June 2006 at 21:34 UTC using a Delta II carrier rocket flying in a 7925-9.5 configuration. The two inspection satellites were lifted to geosynchronous orbit by a fourth stage of a new, experimental design. The stage was developed at the United States Naval Research Laboratory (USNRL), and it is reportedly equipped with photovoltaic arrays for power.[4]
Because of their small dimensions (with a mass of 225 kilograms (496 lb) each), the satellites are hard to detect in their geosynchronous orbit, and thus could approach and examine other satellites without being noticed. After completion of their primary mission, the satellites were parked on opposite sides of Earth. During the 2nd week of January 2009, the MiTEx satellites were commanded to approach DSP-23, which had failed two months earlier, and had started to drift by 1° East from its own parking position at 8.5° East. The MiTEx satellite parked over the mid-Atlantic rendezvoused with DSP-23 around 23 December 2008, followed by the 2nd MiTEx satellite one week later.[4]
This article incorporates text from this source, which is in the public domain.
{{cite journal}}: CS1 maint: periodical has ISBN (link)
This article incorporates text from this source, which is in the public domain.
This article incorporates text from this source, which is in the public domain.
This article incorporates text from this source, which is in the public domain.
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Source: Wikipedia. Article content is retrieved live through the MediaWiki API.
The Micro-satellite Technology Experiment (MiTEx) is a microsatellite-based mission launched into geosynchronous orbit 21 June 2006 aboard a Delta II rocket. The USAF described the mission as a joint "technology demonstration" mission for the Defense Advanced Research Projects Agency (DARPA), the United States Air Force (USAF) and the United States Navy (US Navy). MiTEx consists of three spacecraft; two inspection satellites, designated USA-187 and USA-188, and an experimental upper stage, designated USA-189. The two inspection satellites were initially used to inspect each other; however, they were later used to inspect DSP-23, a failed missile detection satellite, to find out why it stopped operating. The MiTEx goal was to demonstrate technologies such as lightweight power and propulsion systems, avionics, structures, commercial off-the-shelf components, advanced communications, and on-orbit software environments.
The Stadion Miejski (English: Municipal Stadium) is located in Białystok, Poland. It is currently used mostly for association football matches and is the home ground of Jagiellonia Białystok. The stadium is also known as the Stadion Jagiellonii Białystok (English: Jagiellonia Białystok Stadium) in connection with its most common host. The stadium recently underwent major redevelopment, completed at the end of 2014, it now contains 22,432 seats. Full cost of the redevelopment is not clear as the city had to terminate contract with one contractor, Polish-French Eiffage Mitex consortium. Both parties agreed on PLN 168 million (US$60 million) in 2010, but finances are not settled. In 2012 construction was taken over by new contractors, Spanish-Polish consortium of OHL and Hydrobudowa agreed to finish all remaining work at a cost of PLN 254 million (US$75 million). From 19 September 2024, the stadium is called Chorten Arena for sponsorship reasons.
Propargite (IUPAC name 2-(4-tert-butylphenoxy)cyclohexyl prop-2-yne-1-sulfonate, trade names Mitex, Omite and Comite) is a pesticide used to kill mites (an acaricide). It acts through inhibition of mitochondrial ATP synthase, and is in IRAC group 12C. Symptoms of excessive exposure are eye and skin irritation, and possibly sensitization. It is highly toxic to amphibians, fish, and zooplankton, as well as having potential carcinogenity.
QuickBird was a high-resolution commercial Earth observation satellite, owned by DigitalGlobe, launched in 2001 and reentered after orbit decay in 2015. QuickBird used Ball Aerospace's Global Imaging System 2000 (BGIS 2000). The satellite collected panchromatic (black and white) imagery at 61 centimeter resolution and multispectral imagery at 2.44- (at 450 km) to 1.63-meter (at 300 km) resolution, as orbit altitude is lowered during the end of mission life. At this resolution, detail such as buildings and other infrastructure are easily visible. However, this resolution is insufficient for working with smaller objects such as a license plate on a car. The imagery can be imported into remote sensing image processing software, as well as into GIS packages for analysis. Contractors included Ball Aerospace & Technologies, Kodak and Fokker Space. Original plans called for a constellation of three QuickBird satellites scheduled to be in orbit by 2008. In the end, two QuickBird satellites, QuickBird I and II, made it to launch pad. However, only QuickBird II made it successfully into orbit (QuickBird I suffered launch failure). Thus QuickBird II satellite is usually referred to simply as QuickBird, and by the name QuickBird is usually meant the satellite QuickBird II. Prior to QuickBird I and II, DigitalGlobe launched the EarlyBird 1 successfully in 1997 but the satellite lost communications after only four days in orbit due to power system failure.
Before the 1921 destruction of Tulsa’s Greenwood District, Black residents had created a remarkable center of business and community life. The district included stores, professional offices, entertainment venues and homes owned by Black citizens. Understanding Greenwood means learning what was built—not only what was burned.
MORE →Joe Louis.
