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Movements, leaders, victories and the continuing fight for equality.
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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.
Mansa Musa was the ruler of the Mali Empire in West Africa. Details recorded here should be sourced; unknown information is left blank.
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
| Mission type | Radar imaging |
|---|---|
| Operator | US National Reconnaissance Office |
| COSPAR ID | 1964-087A |
| SATCAT no. | 00964 |
| Mission duration | 4 days |
| Spacecraft properties | |
| Spacecraft type | Quill |
| Bus | Agena-D |
| Manufacturer | Boeing Goodyear ERIM Lockheed (Agena) |
| Launch mass | 1,500 kilograms (3,300 lb) |
| Start of mission | |
| Launch date | 21 December 1964, 19:08:56 UTC |
| Rocket | TAT SLV-2A Agena-D 425 |
| Launch site | Vandenberg LC-75-1-1 |
| End of mission | |
| Deactivated | December 1964 |
| Decay date | 11 January 1965 |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Low Earth |
| Eccentricity | 0.00196 |
| Perigee altitude | 238 kilometers (148 mi) |
| Apogee altitude | 264 kilometers (164 mi) |
| Inclination | 70.1 degrees |
| Period | 89.4 minutes |
| Epoch | 21 December 1964, 14:12:00 UTC[1] |
| Instruments | |
| SLAR | |
OPS 3762, also known as FTV-2355, was an American reconnaissance satellite which was launched in 1964.[2] It was the first radar imaging satellite to be launched, and the only Quill spacecraft to fly. Its mission was to demonstrate radar imaging techniques for future missions. However, the programme was cancelled before any more satellites were launched.[3]
OPS 3762 was successfully launched aboard a Thrust Augmented Thor SLV-2A Agena-D carrier rocket, flying from Launch Complex 75-1-1 at the Vandenberg Air Force Base. The launch, which was the last orbital launch of the year, occurred at 19:08:56 UTC on 21 December 1964, and successfully placed the spacecraft into the low Earth orbit in which it conducted its mission.[4] Owing to concerns that using radar over the Soviet Union may have been seen as provocative, OPS 3762 conducted imaging tests over the Northwestern United States instead.[5]
OPS 3762 was a 1,500 kilograms (3,300 lb) spacecraft, based on the Agena-D which also served as the upper stage of its carrier rocket.[6] It operated for four days. Its orbit had a perigee of 208 kilometres (129 mi), an apogee of 222 kilometres (138 mi), 70 degrees of inclination, and an orbital period of 88.8 minutes.[2] Its side looking airborne radar produced images, which were returned in a KH-4 film capsule at the end of the mission.[7] OPS 3762 itself remained in orbit until 11 January 1965, when its orbit decayed and it reentered the atmosphere.[2] OPS 3762 completed its mission successfully.[8]
 | This article about one or more spacecraft of the United States is a stub. You can help Wikipedia by adding missing information. |
Source: Wikipedia. Article content is retrieved live through the MediaWiki API.
OPS 3762, also known as FTV-2355, was an American reconnaissance satellite which was launched in 1964. It was the first radar imaging satellite to be launched, and the only Quill spacecraft to fly. Its mission was to demonstrate radar imaging techniques for future missions. However, the programme was cancelled before any more satellites were launched. OPS 3762 was successfully launched aboard a Thrust Augmented Thor SLV-2A Agena-D carrier rocket, flying from Launch Complex 75-1-1 at the Vandenberg Air Force Base. The launch, which was the last orbital launch of the year, occurred at 19:08:56 UTC on 21 December 1964, and successfully placed the spacecraft into the low Earth orbit in which it conducted its mission. Owing to concerns that using radar over the Soviet Union may have been seen as provocative, OPS 3762 conducted imaging tests over the Northwestern United States instead. OPS 3762 was a 1,500 kilograms (3,300 lb) spacecraft, based on the Agena-D which also served as the upper stage of its carrier rocket. It operated for four days. Its orbit had a perigee of 208 kilometres (129 mi), an apogee of 222 kilometres (138 mi), 70 degrees of inclination, and an orbital period of 88.8 minutes. Its side looking airborne radar produced images, which were returned in a KH-4 film capsule at the end of the mission. OPS 3762 itself remained in orbit until 11 January 1965, when its orbit decayed and it reentered the atmosphere. OPS 3762 completed its mission successfully.
This is a list of satellites and spacecraft that have been given OPS designations by the United States Air Force. These designations have been applied to most United States military satellites launched from 1963 to 1984, and after 1984 the designations was changed into the USA designation.
Presbyopia is a physiological insufficiency of optical accommodation associated with the aging of the eye; it results in progressively worsening ability to focus clearly on close objects. Also known as age-related farsightedness (or as age-related long sight in the UK), it affects many adults over the age of 40. A common sign of presbyopia is difficulty in reading small print, which results in having to hold reading material farther away. Other symptoms associated can be headaches and eyestrain. Different people experience different degrees of problems. Other types of refractive errors may exist at the same time as presbyopia. While exhibiting similar symptoms of blur in the vision for close objects, this condition has nothing to do with hypermetropia or far-sightedness, which is almost invariably present in newborns and usually decreases as the newborn gets older. Presbyopia is a typical part of the aging process. It occurs due to age-related changes in the lens (decreased elasticity and increased hardness) and ciliary muscle (decreased strength and ability to move the lens), causing the eye to focus light right behind rather than on the retina when looking at close objects. It is a type of refractive error, along with nearsightedness, farsightedness, and astigmatism. Diagnosis is by an eye examination. Presbyopia can be corrected using glasses, contact lenses, multifocal intraocular lenses, or LASIK (PresbyLASIK) surgery. The most common treatment is glass correction using appropriate convex lens. Glasses prescribed to correct presbyopia may be simple reading glasses, bifocals, trifocals, or progressive lenses. Pilocarpine eye drops are a recently FDA-approved treatment for presbyopia. People over 40 are at risk for developing presbyopia and all people become affected to some degree. An estimated 25% of people (1.8 billion globally) had presbyopia as of 2015.
The Cherry Hill Mall is a super-regional shopping mall in Cherry Hill, New Jersey. The mall is within the unincorporated namesake neighborhood and census-designated place of Cherry Hill Mall. The mall was developed by James Rouse, working in partnership with Strawbridge and Clothier. Designed by architect Victor Gruen, the Cherry Hill Mall opened in 1961 as one of the first enclosed malls in the United States. PREIT acquired the mall in 2003.
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 →The Greenwood District.
