WorldView卫星是DigitalGlobe公司的下一代商业成像卫星系统。DigitalGlobe是美国商业空间图像和地理空间内容的供应商，也是民用遥感航天器的运营商。(DigitalGlobe is an American commercial vendor of space imagery and geospatial content, and operator of civilian remote sensing spacecraft. ) DigitalGlobe is the world’s leading provider of high-resolution Earth imagery, data and analysis. Our Purpose, Vision and Values are pivotal to DigitalGlobe and guide everything we do.
Purpose：Seeing a better world® By giving our customers the power to see the Earth clearly and in new ways, we enable them to make our world a better place.
Vision：By 2020, be the indispensable source of information about our changing planet.
Values：We are relentlessly committed to our customers and our purpose. Our values guide us as we help our customers save lives, resources, and time. We act with integrity, always. We treat people with respect in all dealings. We put mission and team before self. We inspire curiosity and harness innovation. Our results matter.
History：
1992 Founded under the name WorldView Imaging Corporation.
1999 [GeoEye] launches IKONOS - Launches world's first commercial sub-meter resolution imaging satellite
2001 Launches Quickbird, the world’s highest resolution commercial imaging satellite
2008-09 Signs key agreements with customers including Google, Microsoft, and Nokia and enables major location-based service and mapping applications with access to high-resolution satellite imagery and broadens the reach of our products and services.
2009 DigitalGlobe goes public! Begins trading on the New York Stock Exchange under the ticker symbol "DGI"
2009 Launches WorldView-2 and gains eight-band multispectral capability and the highest constellation collection capacity in the industry
2013 Combines with GeoEye and becomes a global leader in Earth imagery and geospatial analysis that can offer a more comprehensive suite of products and services
2014 Acquires Spatial Energy and gains more robust, multi-source geospatial solutions for Energy companies
2014 Launches WorldView-3 and revolutionizes the remote sensing industry with higher resolution and shortwave infrared imaging capabilities
2015 Cleared to sell 30 cm satellite imagery commercially and begins offering the highest resolution imagery yet
2016 Launches WorldView-4—doubling our capacity to collect the industry’s highest resolution, 30 cm imagery.
2016 Acquires The Radiant Group—an important step in deriving new insights for customers from our imagery and other geospatial information sources.
2017年2月，MDA和DigitalGlobe达成协议，MDA以24亿美元收购DigitalGlobe
2017年5月，DigitalGlobe公司与MDA（MacDonald，Dettwiler and Associates, MDA is a global communications and information company providing operational solutions to commercial and government organizations worldwide.)合并成立Maxar Technologies Ltd.，该公司是一家美国空间技术公司，总部位于美国科罗拉多州的Westminster,专门从事制造通信，地球观测，雷达和在轨服务卫星，卫星产品及相关服务。Maxar Technologies is the parent holding company of MacDonald, Dettwiler and Associates, Ltd., headquartered in Vancouver, British Columbia, Canada; Space Systems Loral, headquartered in Palo Alto, California, US; DigitalGlobe, headquartered in Westminster, Colorado, US; and Radiant Solutions, headquartered in Herndon, Virginia, US. Maxar Technologies is dual-listed on the Toronto Stock Exchange and New York Stock Exchange as MAXR.
截至2017年5月，DigitalGlobe的图像目录包含100 PB的数据，每天增长100 TB
截至2017年10月5日，MDA宣布已完成对DigitalGlobe的收购。
按发射时间排列，该公司发射的卫星有EarlyBird-1，IKONOS，QuickBird，GeoEye-1，WorldView-1，WorldView-2，WorldView-3，WorldView-4，WorldView-Legion
WorldView-1
2007年9月18日UTC时间18:35（美国东部时间下午2:35）在美国加利福尼亚州范德堡空军基地由Delta II 运载火箭发射成功(It was launched on September 18, 2007 from Vandenberg Air Force Base on a Delta II 7920-10C)，WorldView-1的平均重访时间为1.7天，每天可以收集高达750,000平方公里（290,000平方英里）的半米图像。卫星还将具备现代化的地理定位精度能力和极佳的响应能力， 能够快速瞄准要拍摄的目标和有效地进行同轨立体成像
WorldView-1卫星于2007年9月18日发射，该卫星成为全球分辨率最高、响应速度最敏捷的商业成像卫星。卫星于高度496km、倾角98度、周期93.4分的太阳同步轨道上，平均的重访周期1.7天，星载大容量全色成像系统每天能够拍摄多达55万平方公里的0.5米分辨率的影像。卫星还将具备现代化的地理定位精度能力和极佳的响应能力，能够快速瞄准要拍摄的目标和有效的进行同轨立体成像。采集能力是QuickBird（快鸟）卫星的4倍。
WorldView-1, launched September 2007, is the first of our next-generation satellites—the most agile satellites ever flown commercially. The high-capacity, panchromatic imaging system features half-meter resolution imagery. Operating at an altitude of 496 kilometers, WorldView-1 has an average revisit time of 1.7 days and is capable of collecting over one million square kilometers per day of half-meter imagery. The satellite is also equipped with state-of-the-art geolocation accuracy capabilities and exhibits stunning agility with rapid targeting and efficient in-track stereo collection.
Features：
（1）Very high resolution
-50 cm panchromatic at nadir
-55 cm GSD at 20° off-nadir
（2）Industry-leading geolocation accuracy
（3）Highest capacity over a broad range of collection types
-17.7 km width imaging swath(wider than any competitor)
-Bi-directional scanning
-Rapid retargeting using Control Moment Gyros (>2x faster than any competitor)
-2199 gigabits on-board storage
-800 Mbps X-band data downlink
（4）Direct downlink to customer sites available using same high-speed 800 Mbps X-band downlink
（5）World-class telescope
--High contrast (MTF) and signal to noise ratio
--Selectable Time Delay Integration (TDI) levels
--11-bit dynamic range
（6）Frequent revisits at high resolution
--1.7 days at 1 meter GSD or less
--5.4 days at 20° off-nadir or less (55 cm GSD)
轨道参数
轨道类型：太阳同步轨道；轨道高度：496km；轨道倾角：97.87°；飞行周期：94.49min；半长轴：6,872.02千米（4,270.08英里）;降交点地方时：10:30AM；设计寿命：7.25年(包括所有消耗品和降解物,如推进剂)；卫星重量：2500kg；重访周期：1.7天（以1m GSD成像时）1.7天(优于1公尺分辨率) 4.6天(0.5~0.59公尺分辨率)
分辨率：星下点处：0.45m(GSD) 偏离星下点20处：0.51m（GSD）
辐射分辨率：11-bits/pixel
遥感器波段：全色
制动器：控制力矩陀螺（CMG）
传感器：星敏感期，固体惯性参照器，GPS 指向精度与认知(knowledge) 精度：成像开始和停止时<500m 认知 支持下面列出的地理定位精度重新定位目标的能力 加速度：2.5°/s/s
速率:4.5°/s
WorldView-1 satellite sensor was successfully launched from Vandenberg Air Force Base, California, U.S.A., at 11:35 Hrs Pacific Daylight Time (PDT) on September 18th, 2007.
Operating at an altitude of 496 kilometers, WorldView-1 satellite has an average revisit time of 1.7 days and is capable of collecting up to 750,000 square kilometers (290,000 square miles) per day of half-meter imagery. The satellite is also equipped with state-of-the-art geo-location capabilities and exhibits stunning agility with rapid targeting and efficient in-track stereo collection.
WorldView-2
WorldView-2提供0.46米（18英寸）分辨率的商用全色图像，以及1.84米（72英寸）分辨率的八波段多光谱图像。它于2009年10月8日18:51:01(UTC)由Delta II 7920-10C，D-345发射成为DigitalGlobe的第三颗轨道卫星，加入了2007年发射的WorldView-1和2001年发射的QuickBird。它每1.1天拍摄一张地球上任何地方的新照片。（It was launched 8 October 2009 to become DigitalGlobe's third satellite in orbit, joining WorldView-1 which was launched in 2007 and QuickBird which was launched in 2001. It takes a new photograph of any place on Earth every 1.1 days.）
WorldView-2 was launched 8 October 2009 from Vandenberg Air Force Base on a Delta II flying in the 7920 configuration. The launch vehicle was provided by the United Launch Alliance and launch services were administered by Boeing.
The WorldView-2 sensor provides a high resolution panchromatic band and eight (8) multispectral bands; four (4) standard colors (red, green, blue, and near-infrared 1) and four (4) new bands (coastal, yellow, red edge, and near-infrared 2), full-color images for enhanced spectral analysis, mapping and monitoring applications, land-use planning, disaster relief, exploration, defense and intelligence, and visualization and simulation environments.
WorldView-2 will be the fastest for synoptic collects of targets and large areas while providing 8 spectral bands
轨道参数
轨道类型：太阳同步轨道；轨道高度：770km；轨道倾角：98.40°；轨道周期：100.16min
Launch Date October 8, 2009
Launch Vehicle Delta 7920 (9 strap-ons)
Launch Site Vandenberg Air Force Base
Orbit Altitude 770 kilometers
Orbit Type Sun synchronous, 10:30 am (LT) descending Node
Orbit Period 100 minutes; 7.25 year mission life, including all consumables and degradables (e.g., propellant)
Spacecraft Size, Mass, & Power 4.3 meters (14 feet) tall x 2.5 meters (8 feet) across, 7.1 meters (23 feet) across the deployed solar arrays; 2800 kilograms (6200 pounds); 3.2 kW solar array, 100 Ahr battery
Sensor Bands Panchromatic 8 Multispectral (4 standard colors: red, blue, green, near-IR), 4 new colors: red edge, coastal, yellow, near-IR2
Sensor Resolution GSD Ground Sample Distance Panchromatic: 0.46 meters GSD at Nadir, 0.52 meters GSD at 20° Off-Nadir
Multispectral: 1.84 meters GSD at Nadir, 2.4 meters GSD at 20° Off-Nadir
Dynamic Range 11-bits per pixel
Time Delay Integration (TDI) Panchromatic - 6 selectable levels from 8 to 64
Multispectral - 7 selectable levels from 3 to 24
Swath Width 16.4 kilometers at nadir
Attitude Determination and Control 3-axis stabilized
Actuators Control Moment Gyros (CMGs)
Sensors Star trackers, solid state IRU
GPS Position Accuracy & Knowledge < 500 meters at image start and stop Knowledge: Supports geolocation accuracy below Retargeting
Agility Acceleration 1.5 deg/s/s
Rate: 3.5 deg/s
Time to slew 300 kilometers: 9 seconds
Onboard Storage 2199 gigabits solid state with EDAC Communications
Image and Ancillary Data: 800 Mbps X-band
Housekeeping：4, 16 or 32 kbps real-time, 524 kbps stored, X-band
Command：2 or 64 kbps S-band
Max Viewing Angle：Accessible Ground Swath Nominally +/-40° off-nadir = 1355 km wide swath
Higher angles selectively available
Per Orbit Collection: 524 gigabits
Max Contiguous Area Collected in a Single Pass: 96 x 110 km mono, 48 x 110 km stereo
Revisit ：Frequency1.1 days at 1 meter GSD or less 3.7 days at 20° off-nadir or less (0.52 meter GSD)
Geolocation Accuracy：Demonstrated <3.5 m CE90 without ground control
WorldView-3
2014年8月13日18:30:30 UTC发射，7年以上寿命，0.31m全色和8波段多光谱影像。
WorldView-3 is a commercial Earth observation satellite owned by DigitalGlobe. It was launched on 13 August 2014 to become DigitalGlobe's sixth satellite in orbit, joining Ikonos which was launched in 1999, QuickBird in 2001, WorldView-1 in 2007, GeoEye-1 in 2008, and WorldView-2 in 2009. WorldView-3 provides commercially available panchromatic imagery of 0.31 m (12 in) resolution, eight-band multispectral imagery with 1.24 m (4 ft 1 in) resolution, shortwave infrared imagery at 3.7 m (12 ft 2 in) resolution, and CAVIS (Clouds, Aerosols, Vapors, Ice, and Snow) data at 30 m (98 ft) resolution.
WorldView-3 was launched on 13 August 2014 from Vandenberg Air Force Base on an Atlas V flying in the 401 configuration. The launch vehicle was provided by United Launch Alliance and launch services were administered by Lockheed Martin.
轨道类型：太阳同步；轨道倾角：97.97°；飞行周期：96.98min
WorldView-4
previously known as GeoEye-2, is a third generation commercial Earth observation satellitelaunched on 11 November 2016. The spacecraft is operated by DigitalGlobe. With a maximum resolution of 31 cm (12 in), WorldView-4 provides similar imagery as WorldView-3, the highest resolution commercially available at the time of its launch
In July 2014, DigitalGlobe announced that GeoEye-2 had been renamed to WorldView-4 to better match the company's branding, and that, due to a projected increase in product demand, the spacecraft's launch had been scheduled for mid-2016.
2014年7月，DigitalGlobe宣布将GeoEye-2更名为WorldView-4以更好地匹配公司的品牌，并且由于预计产品需求的增加，该航天器的发布计划于2016年中期推出。
WorldView-4 was launched on 11 November 2016 at 18:30:33 UTC from Vandenberg Air Force Base Space Launch Complex 3E aboard an Atlas V rocket.The rocket launched in the 401 configuration with serial number AV-062, and was provided and administered by United Launch Alliance.This is the same rocket that had been scheduled to launch the InSight Mars lander, which was delayed until 2018
WorldView-4于2016年11月11日18:30:33 UTC从范登堡空军基地 太空发射中心3E发射，搭载阿特拉斯V型火箭。火箭在401配置中发射，序列号为AV-062，由联合发射联盟提供和管理。
The spacecraft's telescope is called the GeoEye Imaging System-2,also known as SpaceView 110,which was designed and built by ITT Corporation (later ITT Exelis and Harris).The telescope mirror is 1.1 m (3.6 ft) in diameter. It provides panchromatic images at a highest resolution of 31 centimeters per pixel (12 in/px) between 450 and 800 nanometers, and multispectral images at 124 centimeters per pixel (49 in/px) in blue, green, red and near-infrared channels (655-690 nm, 510-580 nm, 450-510 nm and 780-920 nm, respectively).
该航天器的望远镜被称为GeoEye成像系统-2，也称为SpaceView 110，由ITT公司（后来的ITT Exelis和Harris）设计和制造。望远镜的直径为1.1米（3.6英尺）。它提供全彩色图像，最高分辨率为每像素31厘米（12英寸/像素），介于450和800 纳米之间，多光谱图像为124厘米/像素（49英寸/像素），蓝色，绿色，红色和近- 红外通道（分别为655-690nm，510-580nm，450-510nm和780-920nm）
Regime Sun-synchronous 轨道类型：太阳同步轨道；半长轴：6,989.75 km；Period：96.93 minutes 飞行周期：96.93min；Repeat interval：3 days 重访周期：3天；
