Soil Moisture Measurement System for DPHP Sensor and In Situ Applications

2013 ◽  
Author(s):  
Vinay S. Palaparthy ◽  
S.U. Susha Lekshmi ◽  
Jobish John ◽  
Shahbaz Sarik ◽  
Maryam Shojaei Bhagini ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Measurement System ◽  
Moisture Measurement ◽  
Soil Moisture Measurement

scholarly journals Evaluation of the AMSR2 L2 soil moisture product of JAXA on the Mongolian Plateau over seven years (2012–2018)

2019 ◽  
Vol 1 (11) ◽  
Author(s):  
Ichirow Kaihotsu ◽  
Jun Asanuma ◽  
Kentaro Aida ◽  
Dambaravjaa Oyunbaatar
Keyword(s):  
Soil Moisture ◽  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Surface Soil ◽  
Surface Soil Moisture ◽  
Mongolian Plateau ◽  
Moisture Measurement ◽  
Rainfall Condition ◽  
Soil Moisture Measurement

Abstract This study evaluated the Advanced Microwave Scanning Radiometer 2 (AMSR2) L2 soil moisture product (ver. 3) using in situ hydrological observational data, acquired over 7 years (2012–2018), from a 50 × 50 km flat area of the Mongolian Plateau covered with bare soil, pasture and shrubs. Although AMSR2 slightly underestimated soil moisture content at 3-cm depth, satisfactory timing was observed in both the response patterns and the in situ soil moisture data, and the differences between these factors were not large. In terms of the relationship between AMSR2 soil moisture from descending orbits and in situ measured soil moisture at 3-cm depth, the values of the RMSE (m3/m3) and the bias (m3/m3) varied from 0.028 to 0.063 and from 0.011 to − 0.001 m3/m3, respectively. The values of the RMSE and bias depended on rainfall condition. The mean value of the RMSE for the 7-year period was 0.042 m3/m3, i.e., lower than the target accuracy 0.050 m3/m3. The validation results for descending orbits were found slightly better than for ascending orbits. Comparison of the Soil Moisture and Ocean Salinity (SMOS) soil moisture product with the AMSR2 L2 soil moisture product showed that AMSR2 could observe surface soil moisture with nearly same accuracy and stability. However, the bias of the AMSR2 soil moisture measurement was slightly negative and poorer than that of SMOS with deeper soil moisture measurement. It means that AMSR2 cannot effectively measure soil moisture at 3-cm depth. In situ soil temperature at 3-cm depth and surface vegetation (normalized difference vegetation index) did not influence the underestimation of AMSR2 soil moisture measurements. These results suggest that a possible cause of the underestimation of AMSR2 soil moisture measurements is the difference between the depth of the AMSR2 observations and in situ soil moisture measurements. Overall, this study proved the AMSR2 L2 soil moisture product has been useful for monitoring daily surface soil moisture over large grassland areas and it clearly demonstrated the high-performance capability of AMSR2 since 2012.

Agro-Smart Caribe: Soil Moisture Measurement System

2021 ◽  
pp. 422-434
Author(s):  
Eduardo Gomez ◽  
Jorge Eliecer Duque ◽  
Alvaro José Rojas ◽  
Cristian Camilo Jaik ◽  
Jose Angel Pertuz
Keyword(s):  
Soil Moisture ◽  
Measurement System ◽  
Moisture Measurement ◽  
Soil Moisture Measurement

A neutron scattering soil moisture measurement system with a linear response

2018 ◽  
Vol 142 ◽  
pp. 167-172 ◽  
Author(s):  
S. Balaghi ◽  
N. Ghal–Eh ◽  
A. Mohammadi ◽  
H.R. Vega–Carrillo
Keyword(s):  
Soil Moisture ◽  
Neutron Scattering ◽  
Measurement System ◽  
Linear Response ◽  
Moisture Measurement ◽  
Soil Moisture Measurement
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