Geolocation Accuracy Performance of the DigitalGlobe Constellation During 2017 and … · 2018. 12....

©DigitalGlobe. All rights reserved

Geolocation Accuracy Performance of the DigitalGlobeConstellation During 2017 and 2018 H1

David Mulawa, Chris Comp and Brendan Clarke

JACIE 2018 | College Park, MD

©DigitalGlobe. All rights reserved.

Introduction

JACIE 2018 | College Park, MD 2

• This presentation collects together geolocation accuracy performance assessments for the DigitalGlobe satellite constellation from imagery collected during 2017 and 2018 H1.

• The satellites have been performing well and provided good geolocation accuracy performance for 2017 and 2018 H1.

• CE90 and LE90 estimation is based on the Rank Order Percentile Method- Presented by NIQU/CCAP

- Bresnahan, P., Absolute Geolocation Accuracy Evaluation of Worldview-1 Basic 1B Stereo Pairs, JACIE 2010

- Bresnahan, P., Absolute Geolocation Accuracy Evaluation of GeoEye-1 Basic Stereo Triplets, JACIE 2010

- Bresnahan, P., Kompsat-3A Absolute Geolocation Geolocation Accuracy Evaluation, JACIE 2017


DigitalGlobe Constellation Horizontal Accuracy for 2017 and 2018 H1


Satellite Mono

# images CE90 (m)

RMSE(m)

WorldView-1 914 4.5 2.9

WorldView-2 3382 4.3 2.6

WorldView-3 1931 4.0 2.7

WorldView-4 1139 5.6 3.8

GeoEye-1 347 4.4 3.0


DigitalGlobe Constellation Stereo Accuracy for 2017 and 2018 H1


Satellite Horizontal Vertical

# stereo pairs

CE90 (m)

RMSE(m)

LE90 (m)

RMS(m)

WorldView-1 315 3.6 2.4 2.6 1.6

WorldView-2 293 5.1 3.1 4.4 2.8

WorldView-3 215 3.9 2.6 3.0 1.8

GeoEye-1 289 3.0 1.9 2.8 1.6


GeoEye-1 Launch 2008 Sep 6


Period Mono Stereo

# images CE90 (m)

RMSE radial

(m)

# pairs CE90 (m)

RMSEradial

(m)

LE90 (m)

RMSEH

(m)

2009 Q2-Q4 530 3.6 2.3 222 3.4 2.2 3.2 2.0

2010 136 3.8 2.4 65 3.5 2.2 3.5 2.3

2011 193 2.8 1.9 43 2.8 1.9 2.9 1.8

2012 120 3.0 2.0 28 2.6 1.8 2.7 2.0

2013 63 3.1 2.0 17 2.9 1.8 2.6 1.6

2014 57 4.0 2.7 113 4.1 2.7 4.0 2.4

2015 129 4.4 3.0 37 3.2 2.0 2.7 1.8

2016 354 3.8 2.5 169 2.1 -- 2.8 -

2017-2018 H1 347 4.4 3.0 289 3.0 1.9 2.8 1.6


WorldView-1 Mono Horizontal Accuracy: Statistics


CE90 = 4.5 mRMSE = 2.9 m

N = 914 imagesAvg(East) = -0.2 m Avg(North) = -0.8 m

0 1 2 3 4 5 6 7 8 9 100

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

Radial Horizontal Error (m)

Fre

qu

ency


WorldView-1 Mono Horizontal Accuracy: Time Series


Each green dot is the mean radial accuracy of a test image measured in the geodetic frame.

Each black dot is the measured CE90

accuracy for the quarter shown.

0

1

2

3

4

5

6

7

8

9

10

WV

01

Im

ag

e A

ccu

racy

(m

)

2017−0

1−01

4.5

2017−0

4−01

4.4

2017−0

7−01

4.2

2017−1

0−01

4.5

2018−0

1−01

4.6

2018−0

4−01

4.6

2018−0

7−01




CE90 = 4.3 mRMSE = 2.6 m

N = 3382 imagesAvg(East) = -0. m Avg(North) = -0.4 m

0 1 2 3 4 5 6 7 8 9 100

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1


Fre

qu

ency







0

1

2

3

4

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6

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8

9

10

WV

02

Im

ag

e A

ccu

racy

(m

)

2017−0

1−01

4.1

2017−0

4−01

4.1

2017−0

7−01

4.2

2017−1

0−01

4.7

2018−0

1−01

4.4

2018−0

4−01

4.4

2018−0

7−01




CE90 = 4.0 mRMSE = 2.7 m

N = 1931 imagesAvg(East) = 0.4 m Avg(North) = 0.2 m

0 1 2 3 4 5 6 7 8 9 100

0.1

0.2

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Fre

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0

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WV

03

Im

ag

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ccu

racy

(m

)

2017−0

1−01

4.0

2017−0

4−01

4.0

2017−0

7−01

4.0

2017−1

0−01

3.8

2018−0

1−01

4.1

2018−0

4−01

4.0

2018−0

7−01




CE90 = 5.6 mRMSE = 3.8 m

N = 1139 imagesAvg(East) = -0.7 m Avg(North) = 0.2 m

0 1 2 3 4 5 6 7 8 9 100

0.1

0.2

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1


Fre

qu

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0

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10

WV

04

Im

ag

e A

ccu

racy

(m

)

2017−0

1−01

5.8

2017−0

4−01

5.5

2017−0

7−01

5.1

2017−1

0−01

5.2

2018−0

1−01

6.2

2018−0

4−01

5.8

2018−0

7−01


GeoEye-1 Mono Horizontal Accuracy: Statistics


CE90 = 4.4 mRMSE = 3.0 m

N = 347 imagesAvg(East) = 0.9 m Avg(North) = -1.0 m

0 1 2 3 4 5 6 7 8 9 100

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1


Fre

qu

ency


GeoEye-1 Mono Horizontal Accuracy: Time Series





0

1

2

3

4

5

6

7

8

9

10

GE

01

Im

ag

e A

ccu

racy

(m

)

2017−0

1−01

4.2

2017−0

4−01

4.0

2017−0

7−01

4.8

2017−1

0−01

4.9

2018−0

1−01

4.4

2018−0

4−01

4.4

2018−0

7−01


WorldView-1 Stereo Horizontal Accuracy: Statistics


CE90 = 3.7 mRMSE = 2.5 m

N = 128 imagesAvg(East) = -0.7 m Avg(North) = 0.0 m

8 6 4 2 0 2 4 6 88

6

4

2

0

2

4

6

8

Longitude Error (m)

Lat

itude

Err

or

(m)

0 1 2 3 4 5 6 7 80

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0.9

1

radial horizontal error (m)

freq

uen

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cum

ula

tive

freq

uen

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WorldView-1 Stereo


N = 315 images

Avg(East) = -0.5 mAvg(North) = 0.3 m

CE90 = 3.6 mRMSE = 2.4 m

Avg(Height) = 0.4 m

LE90 = 2.6 mRMS = 1.6 m

8 6 4 2 0 2 4 6 88

6

4

2

0

2

4

6

8

Longitude Error (m)L

atit

ud

e E

rro

r (m

)

0 1 2 3 4 5 6 7 80

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0 1 2 3 4 5 6 7 80

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absolute vertical error (m)

freq

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WorldView-2 Stereo


N = 293 images

Avg(East) = -0.2 mAvg(North) = -0.1 m

CE90 = 5.1 mRMSE = 3.1 m

Avg(Height) = 0.5 m

LE90 = 4.4 mRMS = 2.8 m

8 6 4 2 0 2 4 6 88

6

4

2

0

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8


atit

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rro

r (m

)

0 1 2 3 4 5 6 7 80

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0 1 2 3 4 5 6 7 80

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WorldView-3 Stereo


N = 215 images

Avg(East) = -0.4 mAvg(North) = 1.1 m

CE90 = 3.9 mRMSE = 2.6 m

Avg(Height) = 0.1 m

LE90 = 3.0 mRMS = 1.8 m

8 6 4 2 0 2 4 6 88

6

4

2

0

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atit

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r (m

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GeoEye-1 Stereo


N = 289 images

Avg(East) = -0.4 mAvg(North) = -0.3m

CE90 = 3.0 mRMSE = 1.9 m

Avg(Height) = -0.5m

LE90 = 2.8 mRMS = 1.6 m

8 6 4 2 0 2 4 6 88

6

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GeoEye-1 2018 Aug 29 University of Maryland


Geolocation Accuracy Performance of the DigitalGlobe Constellation During 2017 and … · 2018. 12....

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Transcript of Geolocation Accuracy Performance of the DigitalGlobe Constellation During 2017 and … · 2018. 12....