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Test Site Catalog

 

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I. CEOS Reference Test Sites
II. Questionnaire for information regarding the CEOS WGCV IVOS subgroup Cal/Val test sites for land imager radiometric gain
1.  Dome C, Antarctica
2.  Dunhuang, China, Asia (POC reviewed)
3.  Lspec Frenchman Flat, NV, USA, North America
4.  Ivanpah, NV/CA, USA, North America
5.  La Crau, France, Europe
6.  Negev, Southern Israel, Asia (POC reviewed)
7.  Railroad Valley Playa, NV, USA, North America
8.  Tuz Golu, Central Anatolia, Turkey, Asia (POC reviewed)

 



CEOS Reference Test Sites

The CEOS IVOS sub-group members worked with partners around the world to establish a set of CEOS-endorsed, globally distributed, reference standard test sites for the post-launch calibration of space-based optical imaging sensors. Based on the decision from the CEOS IVOS-19 meeting (Feb. 6–7, 2008) that was held in Phoenix, Arizona, there are now eight instrumented sites and six Pseudo-Invariant Calibration Sites (PICS).

The eight instrumented sites are Dome C, Antarctica; Dunhuang, China; Frenchman Flat, USA; Ivanpah Playa, USA; La Crau, France; Negev Desert, Israel; Railroad Valley Playa, USA; Tuz Golu, Turkey. The CEOS instrumented sites are provisionally being called LANDNET. These instrumented sites are primarily used for field campaigns to obtain radiometric gain, and these sites can serve as a focus for international efforts, facilitating traceability and inter-comparison to evaluate biases of in-flight and future instruments in a harmonized manner.  In the longer-term it is anticipated that these sites will all be fully automated and provide surface and atmospheric measurements to the WWW in an autonomous manner reducing some of the cost of a manned campaign, at present three can operate in this manner.

The six CEOS reference PICS are Libya 4; Mauritania 1; Mauritania 2; Algeria 3; Libya 1; Algeria 5. Besides the nominally good site characteristics (temporal stability, uniformity, homogeneity, etc.), these six PICS were selected by also taking into account their heritage and the large number of datasets from multiple instruments that already existed in the EO archives and the long history of characterization performed over these sites. The PICS have high reflectance and are usually made up of sand dunes with climatologically low aerosol loading and practically no vegetation. Consequently, these PICS can be used to evaluate the long-term stability of instrument and facilitate inter-comparison of multiple instruments.

 

CEOS Reference Standard Test Sites
#
Site Name
Center Latitude
Center Longitude
WRS-2 Path/Row
POC
Affilation
Contact
Instrumented Sites
1
Dome C, Antarctica
-74.50
123.00
89 / 113
Stephen Warren
University of Washington
2
Dunhuang, China
40.13
94.34
137 / 32
Fu Qiaoyan
CRESDA
3
Frenchman Flat, USA
36.81
-115.93
40 / 34
Carol J. Bruegge
NASA/JPL
4
Ivanpah Playa
35.57
-115.40
39 / 35
Kurtis J. Thome
NASA/GSFC
5
La Crau, France
43.56
4.86
196 / 30
Patrice Henry
CNES
6
Negev, Southern Israel
30.11
35.01
174 / 39
Arnon Karnieli
Ben Gurion University
7
Railroad Valley Playa
38.50
-115.69
40 / 33
Kurtis J. Thome
NASA/GSFC
8
Tuz Golu
38.83
33.33
177 / 33
Selime Gurol
TUBITAK UZAY
Pseudo-Invariant Calibration Sites (PICS)
1
Libya 4
28.55
23.39
181 / 40
Patrice Henry
CNES
2
Mauritania 1
19.40
-9.30
201 / 47
Patrice Henry
CNES
3
Mauritania 2
20.85
-8.78
201 / 46
Patrice Henry
CNES
4
Algeria 3
30.32
7.66
192 / 39
Patrice Henry
CNES
5
Libya 1
24.42
13.35
187 / 43
Patrice Henry
CNES
6
Algeria 5
31.02
2.23
195 / 39
Patrice Henry
CNES

 
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