The Importance of Overpass Time in Agricultural Applications of Radar

S. Khabbazan; P.C. Vermunt; S.C. Steele-Dunne; J. Judge

doi:10.1109/IGARSS47720.2021.9553391

The Importance of Overpass Time in Agricultural Applications of Radar

S. Khabbazan, P.C. Vermunt, S.C. Steele-Dunne, J. Judge

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

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Abstract

The objective of this study was to investigate the effect of diurnal variation in internal and surface canopy water on L-band backscatter in the context of the influence of overpass time on agricultural applications. A unique and intensive dataset was collected during a full growing season of corn in Florida, USA in 2018. L-band data was collected by using a fully polarized scatterometer mounted on a crane. In order to measure internal vegetation water distribution and dry biomass, pre-dawn destructive sampling was conducted three times a week for a full growing season. In addition, soil moisture, meteorological, dew, and interception data were measured every 15 minutes for the entire growing season. Results demonstrate that the presence of surface canopy water and diurnal internal water dynamics can each affect the radar backscatter up to 3–4 dB. The surface canopy water also affects the relationship between radar and crop biophysical variables. In corn, the spearman rank correlation between backscatter and biophysical variables is, on average, about 0.2 higher for dry vegetation compared to wet vegetation. The results highlight the possible influence of overpass time on the interpretation of radar data for vegetation monitoring.

Original language	English
Title of host publication	2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS
Subtitle of host publication	Proceedings
Place of Publication	Danvers
Publisher	IEEE
Pages	6084-6087
Number of pages	4
ISBN (Electronic)	978-1-6654-0369-6
ISBN (Print)	978-1-6654-4762-1
DOIs	https://doi.org/10.1109/IGARSS47720.2021.9553391
Publication status	Published - 2021
Event	IGARSS 2021: 2021 IEEE International Geoscience and Remote Sensing Symposium - Virtual at Brussels, Belgium Duration: 11 Jul 2021 → 16 Jul 2021

Publication series

Name	International Geoscience and Remote Sensing Symposium (IGARSS)
Volume	2021-July

Conference

Conference	IGARSS 2021
Country/Territory	Belgium
City	Virtual at Brussels
Period	11/07/21 → 16/07/21

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

surface canopy water
sub-daily radar
L-band backscatter
crop monitoring
VWC

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10.1109/IGARSS47720.2021.9553391

The_Importance_of_Overpass_Time_in_Agricultural_Applications_of_Radar_1_Final published version, 1.25 MB

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Khabbazan, S., Vermunt, P. C., Steele-Dunne, S. C., & Judge, J. (2021). The Importance of Overpass Time in Agricultural Applications of Radar. In 2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS: Proceedings (pp. 6084-6087). Article 9553391 (International Geoscience and Remote Sensing Symposium (IGARSS); Vol. 2021-July). IEEE. https://doi.org/10.1109/IGARSS47720.2021.9553391

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title = "The Importance of Overpass Time in Agricultural Applications of Radar",

abstract = "The objective of this study was to investigate the effect of diurnal variation in internal and surface canopy water on L-band backscatter in the context of the influence of overpass time on agricultural applications. A unique and intensive dataset was collected during a full growing season of corn in Florida, USA in 2018. L-band data was collected by using a fully polarized scatterometer mounted on a crane. In order to measure internal vegetation water distribution and dry biomass, pre-dawn destructive sampling was conducted three times a week for a full growing season. In addition, soil moisture, meteorological, dew, and interception data were measured every 15 minutes for the entire growing season. Results demonstrate that the presence of surface canopy water and diurnal internal water dynamics can each affect the radar backscatter up to 3–4 dB. The surface canopy water also affects the relationship between radar and crop biophysical variables. In corn, the spearman rank correlation between backscatter and biophysical variables is, on average, about 0.2 higher for dry vegetation compared to wet vegetation. The results highlight the possible influence of overpass time on the interpretation of radar data for vegetation monitoring.",

keywords = "surface canopy water, sub-daily radar, L-band backscatter, crop monitoring, VWC",

author = "S. Khabbazan and P.C. Vermunt and S.C. Steele-Dunne and J. Judge",

note = "Green Open Access added to TU Delft Institutional Repository {\textquoteleft}You share, we take care!{\textquoteright} – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. ; IGARSS 2021 : 2021 IEEE International Geoscience and Remote Sensing Symposium ; Conference date: 11-07-2021 Through 16-07-2021",

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doi = "10.1109/IGARSS47720.2021.9553391",

language = "English",

isbn = "978-1-6654-4762-1",

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}

Khabbazan, S, Vermunt, PC, Steele-Dunne, SC & Judge, J 2021, The Importance of Overpass Time in Agricultural Applications of Radar. in 2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS: Proceedings., 9553391, International Geoscience and Remote Sensing Symposium (IGARSS), vol. 2021-July, IEEE, Danvers, pp. 6084-6087, IGARSS 2021, Virtual at Brussels, Belgium, 11/07/21. https://doi.org/10.1109/IGARSS47720.2021.9553391

The Importance of Overpass Time in Agricultural Applications of Radar. / Khabbazan, S.; Vermunt, P.C.; Steele-Dunne, S.C. et al.
2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS: Proceedings. Danvers: IEEE, 2021. p. 6084-6087 9553391 (International Geoscience and Remote Sensing Symposium (IGARSS); Vol. 2021-July).

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

TY - GEN

T1 - The Importance of Overpass Time in Agricultural Applications of Radar

AU - Khabbazan, S.

AU - Vermunt, P.C.

AU - Steele-Dunne, S.C.

AU - Judge, J.

N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

PY - 2021

Y1 - 2021

N2 - The objective of this study was to investigate the effect of diurnal variation in internal and surface canopy water on L-band backscatter in the context of the influence of overpass time on agricultural applications. A unique and intensive dataset was collected during a full growing season of corn in Florida, USA in 2018. L-band data was collected by using a fully polarized scatterometer mounted on a crane. In order to measure internal vegetation water distribution and dry biomass, pre-dawn destructive sampling was conducted three times a week for a full growing season. In addition, soil moisture, meteorological, dew, and interception data were measured every 15 minutes for the entire growing season. Results demonstrate that the presence of surface canopy water and diurnal internal water dynamics can each affect the radar backscatter up to 3–4 dB. The surface canopy water also affects the relationship between radar and crop biophysical variables. In corn, the spearman rank correlation between backscatter and biophysical variables is, on average, about 0.2 higher for dry vegetation compared to wet vegetation. The results highlight the possible influence of overpass time on the interpretation of radar data for vegetation monitoring.

AB - The objective of this study was to investigate the effect of diurnal variation in internal and surface canopy water on L-band backscatter in the context of the influence of overpass time on agricultural applications. A unique and intensive dataset was collected during a full growing season of corn in Florida, USA in 2018. L-band data was collected by using a fully polarized scatterometer mounted on a crane. In order to measure internal vegetation water distribution and dry biomass, pre-dawn destructive sampling was conducted three times a week for a full growing season. In addition, soil moisture, meteorological, dew, and interception data were measured every 15 minutes for the entire growing season. Results demonstrate that the presence of surface canopy water and diurnal internal water dynamics can each affect the radar backscatter up to 3–4 dB. The surface canopy water also affects the relationship between radar and crop biophysical variables. In corn, the spearman rank correlation between backscatter and biophysical variables is, on average, about 0.2 higher for dry vegetation compared to wet vegetation. The results highlight the possible influence of overpass time on the interpretation of radar data for vegetation monitoring.

KW - surface canopy water

KW - sub-daily radar

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KW - crop monitoring

KW - VWC

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U2 - 10.1109/IGARSS47720.2021.9553391

DO - 10.1109/IGARSS47720.2021.9553391

M3 - Conference contribution

SN - 978-1-6654-4762-1

T3 - International Geoscience and Remote Sensing Symposium (IGARSS)

SP - 6084

EP - 6087

BT - 2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS

PB - IEEE

CY - Danvers

T2 - IGARSS 2021

Y2 - 11 July 2021 through 16 July 2021

ER -

The Importance of Overpass Time in Agricultural Applications of Radar

Abstract

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Bibliographical note

Keywords

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