Towards multi-frequency soil moisture retrieval using P- and L-band passive microwave sensing technology

Nan Ye, Xiaoling Wu, Jeffrey Walker, Nithyapriya Boopathi, Thomas J. Jackson, Yann Kerr, Edward Kim, Andrew McGrath, In Young Yeo, Mahta Moghaddam

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    3 Citations (Scopus)

    Abstract

    A fundamental limitation of current soil moisture remote sensing technology is that can only provide moisture information on the top 5 cm layer of soil at most, being one-tenth to one-quarter of the wavelength (21 cm at L-band; 1.4 GHz) using the current SMAP and SMOS soil moisture dedicated missions of NASA and ESA. Consequently, we have developed an airborne passive microwave sensing capability at P-band to develop a new state-of-the-art satellite concept that will provide soil moisture data for the top 10 cm layer of soil using radiometer observations at P-band (40 cm; 750 MHz). Not only would P-band provide soil moisture information on a soil layer thickness that more closely relates to that affecting crop and pasture growth, but it is expected to produce greater spatial coverage with improved accuracy to that from L-band. This is because P-band should be less affected by surface roughness conditions and have a reduced attenuation by the overlaying vegetation. This paper describes a series of small airborne field experiments at P-band, and presents some early results of P-band passive microwave observations in comparison with L-band and Kband passive microwave from initial trial flights.

    Original languageEnglish
    Title of host publication2018 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Proceedings
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages3707-3710
    Number of pages4
    ISBN (Electronic)9781538671504, 9781538671511
    DOIs
    Publication statusPublished - 31 Oct 2018
    Event38th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Valencia, Spain
    Duration: 22 Jul 201827 Jul 2018

    Publication series

    NameInternational Geoscience and Remote Sensing Symposium (IGARSS)
    Volume2018-July

    Conference

    Conference38th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018
    CountrySpain
    CityValencia
    Period22/07/1827/07/18

    Keywords

    • Airborne field experiments
    • Brightness temperature
    • K-band
    • L-band
    • Multifrequency
    • P-band
    • Soil moisture

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