Tuz Gölü: new CEOS reference standard test site for infrared visible optical sensors

Gürol, Selime; Behnert, I.; Özen, Hilal; Deadman, Andrew; Fox, Nigel; Leloglu, Ugur Murat

doi:10.5589/m10-086

Cited by 9 publications

(9 citation statements)

References 12 publications

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“…Four 3 x 50 meter tarpaulins are placed along the flight direction of Göktürk-2 to serve as an MTF target, with location determined by digital GPS and visible by the satellite, as shown in Figure 7. Details of the radiometric calibration process have been published in a variety of international journals and conferences (Gürol et al 2008, Gürol et al 2010, Gürbüz et al 2012, Teke et al 2016. Cross calibration and relative calibration of RASAT and Göktürk can be found in ).…”

Section: Tuz Golu Radiometric Calibration Campaignmentioning

confidence: 99%

The Benefits and Challenges of Having an Open and Free Basis Satellite Data Sharing Platform in Turkey: Gezgi̇n

Deveci

Koru

Sakarya

et al. 2016

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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Turkey is a county that experiences rapid socioeconomic development, which, in turn, leads to high urbanization rates due to migration of people from rural to urban areas, many large-scale development projects (e.g. highways, dams, housing and infrastructure), and environmental problems that adversely affect agriculture, such as soil erosion and deforestation. Furthermore, Turkey lies in a region prone to natural disasters, especially earthquakes, landslides, flooding and forest fires. Successfully overcoming these challenges requires continuous monitoring to enable rapid response as well as the development of effective socioeconomic policies. In this regard, space-based earth observation (EO) systems play a critical role in the rapid acquisiton and extraction of crucial information. The first launch of the first Turkish-designed satellite, RASAT, in 2011 led to the wide-spread exploitation of space-based resources by Turkish institutions through the dissemination of EO data on an open and free basis via the GEZGIN internet portal (http://www.gezgin.gov.tr). The push for data sharing was further instigated by the nationally funded project GEOPORTAL (“Satellite Image Processing and Geoportal Development Project”) and European Union FP7 project EOPOWER (“Earth Observation for Economic Empowerment”), which strove to create conditions for sustainable economic development through the increased use of Earth observation products and services for environmental applications. In this work, the technical challenges involving processing and preparing raw satellite data for dissemination as well as software design of the GEZGIN Portal will be presented.

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Section: Tuz Golu Radiometric Calibration Campaignmentioning

confidence: 99%

The Benefits and Challenges of Having an Open and Free Basis Satellite Data Sharing Platform in Turkey: Gezgi̇n

Deveci

Koru

Sakarya

et al. 2016

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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“…An area of 324 km 2 satisfies the homogeneity and reflectivity site selection criteria, making Tuz Gölü suitable for the calibration of low resolution as well as medium and high resolution sensors (Gürol, et. al., 2008), (Gürol, et. al., 2010).…”

Section: The Test Sitementioning

confidence: 99%

Absolute Radiometric Calibration of the Göktürk-2 Satellite Sensor Using Tuz Gölü (Landnet Site) From Ndvi Perspective

Sakarya

Demirhan

Deveci

et al. 2016

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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Commission I, WG I/4 KEY WORDS: Absolute radiometric calibration; Göktürk-2, Tuz Gölü, NDVI ABSTRACT:TÜBİTAK UZAY has conducted a research study on the use of space-based satellite resources for several aspects of agriculture. Especially, there are two precision agriculture related projects: HASSAS (Widespread application of sustainable precision agriculture practices in Southeastern Anatolia Project Region (GAP) Project) and AKTAR (Smart Agriculture Feasibility Project). The HASSAS project aims to study development of precision agriculture practice in GAP region. Multi-spectral satellite imagery and aerial hyperspectral data along with ground measurements was collected to analyze data in an information system. AKTAR aims to develop models for irrigation, fertilization and spectral signatures of crops in Inner Anatolia. By the end of the project precision agriculture practices to control irrigation, fertilization, pesticide and estimation of crop yield will be developed. Analyzing the phenology of crops using NDVI is critical for the projects. For this reason, absolute radiometric calibration of the Red and NIR bands in space-based satellite sensors is an important issue. The Göktürk-2 satellite is an earth observation satellite which was designed and built in Turkey and was launched in 2012. The Göktürk-2 satellite sensor has a resolution 2.5 meters in panchromatic and 5 meters in R/G/B/NIR bands. The absolute radiometric calibration of the Göktürk-2 satellite sensor was performed via the ground-based measurementsspectra-radiometer, sun photometer, and meteorological station-in Tuz Gölü cal/val site in 2015. In this paper, the first ground-based absolute radiometric calibration results of the Göktürk-2 satellite sensor using Tuz Gölü is demonstrated. The absolute radiometric calibration results of this paper are compared with the published cross-calibration results of the Göktürk-2 satellite sensor utilizing Landsat 8 imagery. According to the experimental comparison results, the Göktürk-2 satellite sensor coefficients for red and NIR bands estimated in this work sustained to agree within 2% of calibration coefficients estimated in the cross-calibration results.

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“…An area of 324 km 2 (Gürol, et.al, 2008;Özen, et.al, 2009) satisfies the homogeneity and reflectivity site selection criteria, making Tuz Gölü suitable for the calibration of low resolution as well as medium and high resolution sensors (Gürol, et. al., 2010).…”

Section: Tuz Gölü Turkeymentioning

confidence: 99%

A Survey of Landnet Sites Focusing on Tuz Gölü Salt Lake, Turkey

Gürbüz

Özen

Chander

2012

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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Abstract. Radiometric calibration is critical to ensure the accuracy, veracity, continuity and reliability of satellite data measured from multiple sensors and platforms, and is thus recognized as a key activity by all satellite operators. For imaging sensors, vicarious methods using natural targets (such as salt lakes, deserts, or flatlands that are well-characterized and preferably temporally and spatially stable) as a reference are similarly well established. However, while selecting a target site, it is important that its quality and location are selected to minimize sources of uncertainty for any given sensor. To maximize the benefit from limited resources and minimize the impact on satellite operators, the Infrared Visible Optical Sensor (IVOS) sub-group of Committee on Earth Observation Satellites (CEOS) Working Group on Calibration and Validation (WGCV) has selected a few, well-characterized, regularly instrumented target sites, which have since become known as LANDNET sites. Currently, there are eight LANDNET sites: 1) Dome C, Antarctica; 2) Dunhuang, China, Asia; 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; 7) Railroad Valley Playa, NV, USA, North America; 8) Tuz Gölü, Central Anatolia, Turkey, Asia. This work summarizes the key characteristics, and areas of application of each of the LANDNET sites, especially that of Tuz Gölü, to guide and inform researchers on site selection, and increase international awareness and collaboration in this field. Additionally, detailed information about the Tuz Gölü, Turkey test site is provided, including geographical characteristics, spatial uniformity qualities, and opportunities for international researchers to conduct experiments and measurements. Practical, technical, and logistical experience gained through the international field campaigns organized over the last few years at Tuz Gölü is also shared in detail.

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Tuz Gölü: new CEOS reference standard test site for infrared visible optical sensors

Cited by 9 publications

References 12 publications

The Benefits and Challenges of Having an Open and Free Basis Satellite Data Sharing Platform in Turkey: Gezgi̇n

The Benefits and Challenges of Having an Open and Free Basis Satellite Data Sharing Platform in Turkey: Gezgi̇n

Absolute Radiometric Calibration of the Göktürk-2 Satellite Sensor Using Tuz Gölü (Landnet Site) From Ndvi Perspective

A Survey of Landnet Sites Focusing on Tuz Gölü Salt Lake, Turkey

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