The Potentials of Satellite Images for Map Updating With Emphasizes on Egypt Sat-1 Images

Moustafa, Yasser; Farrag, Farrag A.; Abdelhafiz, Ahmed; Elwahed, Abdelaal M. Abd

doi:10.21608/jesaun.2012.114470

Cited by 2 publications

(1 citation statement)

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“…This satellite was jointly built by Egypt's National Authority for Remote Sensing and Space Sciences (NARSS) together with the Yuzhnoye Design Bureau in Ukraine and was launched on board a Dnepr rocket from the Baikonur Cosmodrome. On 23 October 2010, the National Authority for Remote Sensing and Space Sciences announced that control and communication with the satellite had been lost since July 2010 [12,13].…”

Section: Data Descriptionmentioning

confidence: 99%

Estimating Egyptsat -1 Radiometric Coefficient using Cross Calibration with Spot4 and Spot5

Abdo,

Ziedan,

Elyamany

2023

Int. j. electr. comput. eng. syst. (Online)

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The pre-processing of satellite data is a vital step in harnessing the full potential of remote sensing pictures. EgyptSat-1, Egypt's first satellite for observing the Earth from a distance, encountered a major obstacle as a considerable amount of the images it captured could not be used since the necessary radiometric coefficients were missing. This study utilises a cross-calibration methodology, taking advantage of the spectral similarity between Spot 4 and Spot 5 as reference satellites, in order to retrieve these difficult-to-obtain coefficients. The analysis demonstrates that the selection of window size in the cross-calibration process is crucial in determining the outcomes. In general, smaller window sizes tend to produce better results. However, there are certain cases when larger windows are more successful, such as in the scenario of EgyptSat-1's band 3 and its cross-calibration with Spot 5. In contrast to a previous study, the new methodology produces much diminished uncertainty factors, indicating a remarkable enhancement in accuracy. The cross-calibration results highlight the significance of selecting the appropriate window size and satellite for accurate calibration, especially for the Near-Infrared (NIR) band, which is highly responsive to these parameters. Moreover, there are differences in the computations of offset and gain between Spot 4 and Spot 5, which further highlight the intricacies involved in radiometric calibration. The results of this study lead to the determination of improved calibration coefficients for EgyptSat -1, with the specific aim of maximising the accuracy of the results and minimising any errors.

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Section: Data Descriptionmentioning

confidence: 99%

Estimating Egyptsat -1 Radiometric Coefficient using Cross Calibration with Spot4 and Spot5

Abdo,

Ziedan,

Elyamany

2023

Int. j. electr. comput. eng. syst. (Online)

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Assessment Integration of GF-1 MSS Multispectral and PAN Panchromatic China satellite Images for Producing Image Map and Updating Information Content in Egyptian Map Scale 1:25 000

Ramzi

2016

IJARSG

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The investigation of interpretability of panchromatic satellite image GF-1 integrated with multispectral image with the purpose of producing image map and updating Egyptian topographic map topo has been described. A main objective of this research is to evaluate china GF-1 images for producing and updating topographic maps. The study has been chosen the area of the topographic map sheet at the scale of 1:25000 located in Cairo Governorates and made in 1977 and updated in 1990. In this study, the high resolution GF-1 MSS and PAN satellite images covering Cairo City, Egypt have been used. The proposed methodology based on producing image sheet map and evaluation updating topographic maps according to Egyptian specifications using GF-1 MSS, GF-1 PAN and the integration of GF-1 MSS and PAN. Results are discussed with reference to the specifications required for the scale 1: 25 000 Egyptian topographic maps. The results of these evaluations show that integration of GF-1 MSS and PAN images, from the point of geometric accuracy and Information content have the capability of 1:25,000 scale maps revision with difficulties in identification and extraction some features can be completed using other mapping methods.

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The Potentials of Satellite Images for Map Updating With Emphasizes on Egypt Sat-1 Images

Cited by 2 publications

References 0 publications

Estimating Egyptsat -1 Radiometric Coefficient using Cross Calibration with Spot4 and Spot5

Estimating Egyptsat -1 Radiometric Coefficient using Cross Calibration with Spot4 and Spot5

Assessment Integration of GF-1 MSS Multispectral and PAN Panchromatic China satellite Images for Producing Image Map and Updating Information Content in Egyptian Map Scale 1:25 000

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