Introducing WorldView: DigitalGlobe’s Next Generation …auricht.com/Coasts/documents/DigitalGlobe_Satellite... · · 2009-05-09DigitalGlobe’s Next Generation System Introducing

11 April 2007 1 Digital Globe, Inc. Confidential An Imaging and Information Company

Introducing WorldView: DigitalGlobe’s Next Generation System

Introducing WorldView: DigitalGlobe’s Next Generation System


An Enduring Satellite Constellation

An Enduring Satellite Constellation

DigitalGlobe is in a unique position in the high resolution commercial imagery industry• QuickBird satellite in optimal health;

- Expected to remain in full operations until mid-to-late 2009• WorldView-1 (WV-1) satellite to be launched in mid 2007• WorldView-2 (WV-2) satellite to be launched in 2008

QuickBird

DigitalGlobe Imagery Library

Year 2003 2004 2005 2006 2007 2008 2009

By 3rd quarter 2007, DigitalGlobe’sWorldView-1 and QuickBird spacecraft will be capable of collecting more than 500,000 km2/day of sub-meter imagery

By 1st quarter 2009, with the addition of WorldView-2, the constellation will be capable of collection 1,000,000 km2/day

WV-1

WV-2

2002 2010


ProgramStartAug.

BATC Under

ContractOct.

SatellitePrelim.DesignReview (PDR)

Jan

SatelliteEnv

TestingComplete

April

SensorSubsystemDelivery to

BATCJuly

InstrumentIntegration

into BusDec

LAUNCHJuly 1, 2007

FOCQ3

WorldView-1 and WorldView-2 Satellite Timelines

WorldView-1 and WorldView-2 Satellite Timelines

Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4

2003 2004 2005 2006

Q1 Q2 Q3 Q4

2007

Q1 Q2 Q3 Q4

2008

Q1 Q2

2009

SatelliteCriticalDesignReview (CDR)June

OBADelivery

toBATCSept

LAUNCHDec

Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4

2003 2004 2005 2006

Q1 Q2 Q3 Q4

2007

Q1 Q2 Q3 Q4

2008

Q1 Q2

2009

ProgramStartAug.

BATCUnder

ContractOct

Bus DeltaPDRQ1

WV-110Inst

DeliveryTo

BATCQ1

BusI&T

CompleteQ1

BusComplete

Q2

SpacecraftComplete

Q3

FOCQ1

WorldView-2

WorldView-1

WV-60TelescopeAssembly

and Bus Structure

IntegrationStart Dec

Bus DeltaCDRQ2


Instrument to Bus

IntegrationDec 06 –

mid-Jan 07

Pre-Environment

TestingMid-Jan –Early Feb

S/C Environmental

TestingEarly Feb –

mid April

Solar Array

Deploy, Prop

Module TestFirst Halfof

April

Post-EnvTestLast Half of

April

SpacecraftCompleteFirst Halfof May

Pack/Satellite Ready to Ship

First Halfof May

LAUNCHJuly 1, 2007

Verificationand

Calibration

WorldView-1 Satellite Timeline: Activities to Launch

WorldView-1 Satellite Timeline: Activities to Launch


Comparative ConstellationSchedules

Comparative ConstellationSchedules

• Solid line: Design life• Hatched line: Expected life


DigitalGlobe Constellation

Direct Tasking

Direct Downlink

GeoEye Constellation

Direct Tasking Direct Downlink

OrbView-3 QuickBird

IKONOS

WorldView-1

With Dialog with DG HQ

GeoEye 1

With Dialog with

GeoEye HQ

WorldView-2

Third Generation

Constellation

No Follow-On Satellites

Comparative ConstellationCapabilities

Comparative ConstellationCapabilities


DG Satellite ComparisonDG Satellite Comparison

QuickBird WorldView-1 WorldView-2

1 day2 days3.5 daysAvg Revisit (to 40° latitude target)4X+ per satellite1 XMonoscopic Area Coverage

12K Line Rate:6 x 55 km (1/2 deg cell)3 x 110 km (1 deg cell)2 x 220 km (2 deg cell)24K Line Rate:9 x 55 km (1/2 deg cell)5 x 110 km (1 deg cell)3 x 220 km (2 deg cell)

3 x 55 km (0.5 deg cell)2 x 110 km (1 deg cell)1 x 220 km (2 deg cell)

1x16 km(Single Scene)

Single-Pass Stereoscopic Coverage,<30° off-nadir

Virtual Ground Terminal (VGT)320 Mbps137 Gbits

Reaction Wheels

16.5 km

2.4 m

0.61 mPan / 4 MS

1,100 kg (2400 lb)450 km

2,800 kg (6200 lb)2,500 kg (5500 lb)Weight Class

16.4 km17.7 kmSwath Width

0.5 m(native: 0.46 m**)

0.5 mPanchromatic Resolution (nadir)

2.0 m (native 1.85 m**)

N/AMultispectral Resolution (nadir)

Pan / 8 MS PanSpectral Characteristics

Direct Downlink, VGTRapid Delivery Options800 MbpsWideband Link Rate

1600 Gbits (2200 Beginning of Life (BOL))Onboard StorageControl Moment GyrosPrimary Attitude Control Mechanism

770 km496kmOperational Altitude

** > 0.5 m PAN GSD imagery is only available to customers with a waiver for the resolution restriction; this requires a government-to-government agreement.Note: for WV-2, the 24K PAN line rate is available with a 3K MS line rate, which results in PAN and MS resolutions of 0.5 m and 4 m, respectively.


• 60cm Aperture Telescope• 0.5m Nadir GSD at 496 km• Pan only, Bi-Directional Scan• 2 Terabit Recorder• 800 Mpbs Downlink

• Control Moment Gyros• Large Propulsion Systems• 2 Single Axis Solar Array Wings• Star Tracker, SIRU, GPS

WorldView-1 SatelliteOverview



WorldView-1 SatelliteIntegration (1 of 3)









First Stage Second Stage Solid Rocket Motors (9)

Interstage Payload Adapter Fitting Fairing

WorldView-1 Satellite: Launch Vehicle

WorldView-1 Satellite: Launch Vehicle


• 110cm Aperture Telescope• <0.5m Nadir GSD at 770 km• Pan & 8 MS, Bi-Directional Scan• 2 Terabit Recorder• 800 Mpbs Downlink

• Control Moment Gyros• Large Propulsion Systems• 2 Single Axis Solar Array Wings• Star Tracker, SIRU, GPS




Optical Telescope

WV-1 WV-2Outer Barrel Assembly w/Recallable Aperture

Cover

Sun Shade w/one-time Deployable Aperture Cover

Focal Plane Unit

Spacecraft Bus

Propulsion Module

CMG Module

WorldView-1 and 2: Common Spacecraft Bus

WorldView-1 and 2: Common Spacecraft Bus


WorldView-2 Spectral BandsWorldView-2 Spectral Bands

450 800

400 450

450 510

580

585 625

630 690

705 745

770 895

860 1040

510

300 400 500 600 700 800 900 1000 1100

Wavelengths (nm)

Panchromatic

Coastal

Blue

Green

Yellow

Red

Red Edge

NIR1

NIR2

Band

s

QuickBird Legacy Band

New Spectral Band

• WorldView-2 has a “visible” panchromatic band (Narrower than QuickBird) • WorldView-2 satellite incorporates the industry standard four multispectral bands

-- Red, Blue, Green, Near-Infrared• Four additional (NEW) bands

-- Coastal Blue, Yellow, Red Edge, Longer Wave Near-Infrared (NIR2).


WorldView-2 Spectral Bands:Applications (1 of 2)


Coastal Band (400 - 450 nm): • This band supports vegetation identification and analysis, and supports

bathymetric studies based upon its chlorophyll and water penetration characteristics. Also, this band is subject to atmospheric scattering and will be used to investigate atmospheric correction techniques.

Yellow Band (585 - 625 nm):• Used to identify "yellow-ness" characteristics of targets, important for vegetation

applications. Also, this band will assist in the development of "true-color"hue correction for human vision representation.

Red Edge Band (705 - 745 nm):• Aids in the analysis of vegetative condition. Directly related to plant health

revealed through chlorophyll production.

Near Infrared (IR) 2 Band (860 - 1040 nm):• This band overlaps the NIR 1 band but is less affected by atmospheric influence.

It supports vegetation analysis and biomass studies.




• The addition of a second NIR 2 band allows more effective assessment of disturbed soil, which is a good sign of human movement (e.g., troops, vehicles, etc.), and buried objects (e.g., landmines, etc.)

• The new Yellow, Red Edge, and NIR 2 bands significantly improve the ability to discriminate camouflage from vegetation.

• Added spectral diversity provides ability to perform change detection and surveillance, camouflage detection, mission planning and simulation.

• Together, the six non-NIR multispectral bands can be used to create a natural color image that matches the human visual response. – This is not possible with the four QuickBird MS bands.

• The WorldView-2 panchromatic band has a filter to create a bandpass of 450-800 nm as opposed to QuickBird which is sensitive out to 900 nm.– This shorter wavelength cutoff makes the WorldView-2 panchromatic band

more compatible to other satellite systems and aerial imagery.


• Typical values, without control, using only satellite data (i.e., attitude and ephemeris)

• WorldView-1 and -2 are being built to a 12.2 m CE90 accuracy specification– Expected accuracies are significantly better– Performance goal of ~5 m for WorldView-1 and ~7 m for WorldView-2

WorldViewGeolocational Accuracies

WorldViewGeolocational Accuracies

Initial Attitude/Ephemeris

(Available Immediately After Downlink)

Refined Attitude/Ephemeris (Available Within 2 hours of Pass)

QuickBird N/A 23 m

WorldView-1 19 m 5 m

WorldView-2 22 m 7 m


Very High (Control Moment Gyros, High Altitude)

Moderate (Reaction Wheels, High Altitude)

Moderate (Reaction Wheels, High Altitude)

Moderate (Reaction Wheels, Low Altitude)

Satellite Agility

1722.31Relative satellite Agility (acceleration)[Using QuickBird as Baseline]

WV-1 = 496 kmWV-2 = 770 km

684 km682 km450 kmOrbit Altitude

2015 (WV-2)7 years from launch, Fully Redundant

20072009Expected Lifetime

DDL1, VGTDDLDirect Downlink (DDL)Virtual Ground Terminal (VGT)

Delivery Options

1-2 Days

800 Gb

740 Mpbs

15.2 km / 231 km2

0.5 m Panchromatic1

2.0 m Multispectral(4 bands)

To be launched 2007/08

GeoEyeGeoEye-1

2-3 Days

64 Gb

320 Mbps

11 km / 121 km2

0.82m Panchromatic 3.2m Multispectral

(4 Bands)

1999

Space ImagingIKONOS

2-3 Days

128 Gb

320 Mbps

16.5 km / 272 km2

0.61m Panchromatic2.4m Multispectral

(4 Bands)

2001

DigitalGlobeQuickBird

1,600 Gb (2,200 Gb BOL)On-Board Storage

DailySatellite Revisit (<1m GSD at Mid Lat.)

WV-1 = 17.7 km / 313 km2

WV-2 = 16.4 km / 269 km2Nadir swath width / scene area

WV-1 to be launched 2007WV-2 to be launched 2008

Launched

800 MbpsDownlink Data Rate

0.5 m Panchromatic2.0 m Multispectral** (8 Bands for WV-2)

Resolution

DigitalGlobeWorldView-1 and -2Characteristic

Industry Satellite ComparisonIndustry Satellite Comparison

1 0.5 m resolution PAN imagery is only available immediately to customers with a waiver for the 24 hour restriction, which restricts the PAN spatial resolution to 0.82 m.**Note: the WV-2, 24K PAN line rate is available with the 3K MS line rate, which results in PAN and MS resolutions of 0.5 m and 4 m, respectively.

GeoEye-1 24 K PAN line rate is PAN only.


Revisit At 1 meter Resolution40 Deg Latitude North

Revisit At 1 meter Resolution40 Deg Latitude North

Ikonos Ikonos ~700 km Field of Regard= 3+ Day Revisit

WorldView-2 ~1,850 km Field of Regard= ~1 Day Revisit770 km altitude

682 km altitude

Ikonos 1 meter WV 1 meter

WorldView-2

Field of Regard

496 km altitudeWorldView-1 ~ 1,100 km

Field of Regard= < 2 Day Revisit

WorldView-1


Example:Cross-Track Distance from Tehran to Baghdad ~600km:GeoEye-1 slew time: 32 secIKONOS slew time: 29 secWorldView-1 & 2 slew times: 14 sec

Cross Track Distance = ~600km

Baghdad

Tehran

Higher agility minimizes slew time between targets

Slew Time ComparisonSlew Time Comparison


• WorldView-1 and WorldView-2’s Control Moment Gyros (CMGs) provide an acceleration >10X better than competition

• Better Agility:– Improves collection efficiency– Permits rapid collection of point targets– Increases imaging capacity

20 sec

200 km

GeoEye-1

7 sec

200 km

WorldView-1

7 sec

200 km

WorldView-2

18 sec

200 km

IKONOS

Agility ComparisonAgility Comparison


Higher agility provides superior collection of separated Point Targets

Collection of Point Targets (1 of 2)


WorldView-2

Point Target Rate 2.7X GeoEye-1




Higher agility provides larger point target collection rates for all target spacings

Note: WV-2 and GE-1 at 24K


WorldView-2Area Collection Rate

2.2X GeoEye-13.4X IKONOS

Example:

Collection of 1-deg cells (110km strip lengths)

5 Minute Window Collection Yields:

IKONOS: 10,000 km2

WorldView-1: 25,000 km2

WorldView-2, 24K: 34,000 km2

GeoEye-1, 24K: 15,500 km2

Higher agility provides better area collection rates

Area Collection RatesArea Collection Rates


WorldView-2 Contiguous Area Rate

2.3X GeoEye-1

Higher agility provides faster collection of 1 degree cells

Contiguous Area CollectionContiguous Area Collection


WorldView Systems outperform GeoEye-1 in every category

Relative PerformanceRelative Performance

Collection Comparison

0.0

0.5

1.0

1.5

2.0

2.5

3.0

Points Sustained Area 1° Cell ROIRel

ativ

e to

Geo

Eye-

1 C

apab

ility

IKONOS WorldView -1 WorldView -2 GeoEye-1


Imagine the FutureImagine the Future

QuickBird Natural Color ImagePort of Los Angeles

September 2003

Able to identify/monitor Individual shipping containers

QuickBird Natural Color ImageJiuquan Satellite Launch Center, ChinaOctober 15, 2003

Documents

Introducing WorldView: DigitalGlobe’s Next Generation …auricht.com/Coasts/documents/DigitalGlobe_Satellite... · · 2009-05-09DigitalGlobe’s Next Generation System Introducing