Comparison of the Effective Isotropic Radiated Power Parameter in CYGNSS v2.1 and v3.0 Level 1 Data and Its Impact on Soil Moisture Estimation
نویسندگان
چکیده
Abstract The effective isotropic radiated power (EIRP) is the measured of an antenna pointed in a specific direction. For Global Positioning System (GPS), EIRP function transmitted and gain transmitting antenna. It fundamental observation used for estimating surface reflectivity that can be to estimate near-surface soil moisture. Most investigations GPS moisture level 1 version 2.1 data from eight satellites Cyclone Navigation Satellite (CYGNSS) mission. newer 3.0 introduces dynamic calibration algorithm with variations transmit being tracked using direct signal by navigation receivers. In this paper we compare estimated versions year 2020. We correlate reference observations Soil Moisture Active Passive (SMAP) mission provided on 9x9 km grid bistatic radar equation coherent reflections. correlation CYGNSS SMAP slightly improved versus average 0.10 maximum 0.30. advantage was most noticeable areas where retrieval challenging, such as arid densely vegetated regions world.
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ژورنال
عنوان ژورنال: International Association of Geodesy symposia
سال: 2022
ISSN: ['2197-9359', '0939-9585']
DOI: https://doi.org/10.1007/1345_2022_176