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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.
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Meet the people whose lives, choices and achievements shaped the journey.
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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
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.
The first QuickBird, QuickBird I (or QuickBird 1, QB 1, COSPAR 2000-074A) was launched 20 November 2000, by EarthWatch from the Plesetsk Cosmodrome in Russia by a Kosmos-3M rocket. QB-1 failed to reach planned orbit due to launch vehicle failure and was declared a failure. The satellite re-entered next day still attached to the upper stage of the rocket.[1][2] The QB-1 satellite was in construction similar to QuickBird 2 satellite (described above and below in this article), which became later known simply as QuickBird.[3]
QuickBird II (also QuickBird-2 or Quickbird 2, QB-2, COSPAR 2001-047A) or as it was later known, simply QuickBird, was launched for DigitalGlobe October 18, 2001 from the Vandenberg Air Force Base, California, aboard a Boeing Delta II rocket.[4] The satellite was initially expected to collect at 1 meter resolution but after a license was granted in 2000 by the U.S. Department of Commerce / NASA, DigitalGlobe was able launch the QuickBird II with 0.61 meter panchromatic and 2.4 meter multispectral (previously planned 4 meter) resolution.[4][3]
In April 2011, the Quickbird satellite was raised from an orbit of 450 km (280 mi) to 482 km (300 mi).[5] The process, started in March 2011, extended the satellite's life. Before the operation the useful life of Quickbird was expected to drop off around mid-2012 but after the successful mission, the new orbit prolonged the satellite life into early 2015.
The last picture was acquired on December 17, 2014. On January 27, 2015, QuickBird re-entered Earth's atmosphere.
Sensors
Swath width and area size
Orbit
On-board storage
Spacecraft
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| R&D |
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| Unknown |
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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.
