The use of results of ground-based test site spectrometric measurements for the calibration of satellite observations to estimate hydrological and hydrogeological security

2012 ◽  
Vol 18 (6(79)) ◽  
pp. 14-21
Author(s):  
Yu.V. Kostyuchenko ◽  
◽  
D.M. Solovyov ◽  
M.V. Yushchenko ◽  
S.S. Dugin ◽  
...  
Keyword(s):  
Test Site ◽  
Satellite Observations ◽  
Spectrometric Measurements

SMOS soil moisture data validation in the Aurajoki watershed, Finland

2013 ◽  
Vol 45 (4-5) ◽  
pp. 684-702 ◽  
Author(s):  
Juho Jakkila ◽  
Tiia Vento ◽  
Tapani Rousi ◽  
Bertel Vehviläinen
Keyword(s):  
Surface Layer ◽  
Soil Moisture ◽  
Test Site ◽  
Satellite Observations ◽  
Soil Types ◽  
Soil Parameters ◽  
Model Parameters ◽  
Efficiency Coefficient ◽  
Soil Moisture Model ◽  
Level 2

Soil Moisture and Ocean Salinity (SMOS) level 2 soil moisture observations were validated by the soil moisture simulations of the Watershed Simulation and Forecasting System (WSFS) in the Aurajoki watershed located in Southwest Finland. The validation period included summer seasons 2010–2012. A new 2-layer soil moisture model was developed to simulate soil moisture in two layers, 10 cm thick surface layer and 80 cm thick sub-surface layer, due to low penetration depth of the satellite observations. Both layers of the model were divided into six classes of soil types to characterize the soil properties of the study catchment. The soil parameters for different soil types were estimated using the soil moisture observation network and other model parameters were calibrated against discharge observations. The WSFS with the 2-layer soil moisture model was found appropriate in reproducing observed discharges in the test site. Despite slight dry bias, the SMOS observations were consistent with the simulated surface soil moisture content, giving Nash–Sutcliffe efficiency coefficient of 0.77 and root-mean-square deviation of 0.076. The analysis of the SMOS level 2 data presents promising results for the satellite observations to be used as an indicator of the filling of the soil moisture storage in the WSFS.

Results of Latitude Observations with the Floating Zenith Telescope at Mizusawa: Comparisons between the Results Obtained from the Astronomical and Doppler Satellite Observations

1975 ◽  
Vol 26 ◽  
pp. 461-468
Author(s):  
S. Takagi
Keyword(s):  
Photographic Plate ◽  
Satellite Observations ◽  
Pole Motion

In this article, we intended to see whether we can obtain the same pole motion from two kinds of telescopes: the floating zenith telescope (PZT) and the ILS zenith telescope (VZT). The observations with the PZT have been pursued since 1967.0 with a star list whose star places are taken from the PK4 and its supplement. We revised the method of reduction of the observations with the PZT by adopting a variable scale value for the photographic plate (Takagi et al., 1974).

Magnitude Estimation and Cross-Modal Matching of Lingual Vibrotactile and Auditory Sensation

1989 ◽  
Vol 32 (3) ◽  
pp. 698-702 ◽  
Author(s):  
Daniel Harris ◽  
Donald Fucci ◽  
Linda Petrosino
Keyword(s):  
Auditory Stimulus ◽  
Magnitude Estimation ◽  
Sensory Processing ◽  
Test Site ◽  
Systematic Investigation ◽  
Thenar Eminence ◽  
Stimulus Range ◽  
Psychophysical Scaling ◽  
Scaling Methods ◽  
Response Biases

The present experiment was a preliminary attempt to use the psychophysical scaling methods of magnitude estimation and cross-modal matching to investigate suprathreshold judgments of lingual vibrotactile and auditory sensation magnitudes for 20 normal young adult subjects. A 250-Hz lingual vibrotactile stimulus and a 1000-Hz binaural auditory stimulus were employed. To obtain judgments for nonoral vibrotactile sensory magnitudes, the thenar eminence of the hand was also employed as a test site for 5 additional subjects. Eight stimulus intensities were presented during all experimental tasks. The results showed that the slopes of the log-log vibrotactile magnitude estimation functions decreased at higher stimulus intensity levels for both test sites. Auditory magnitude estimation functions were relatively constant throughout the stimulus range. Cross-modal matching functions for the two stimuli generally agreed with functions predicted from the magnitude estimation data, except when subjects adjusted vibration on the tongue to match auditory stimulus intensities. The results suggested that the methods of magnitude estimation and cross-modal matching may be useful for studying sensory processing in the speech production system. However, systematic investigation of response biases associated with vibrotactile-auditory psychophysical scaling tasks appears to be a prerequisite.

Beacon-satellite observations of wave disturbances in the plasma of near-earth space

2004 ◽  
Vol 10 (2-3) ◽  
pp. 16-21
Author(s):  
O.F. Tyrnov ◽  
◽  
Yu.P. Fedorenko ◽  
L.F. Chernogor ◽  
◽  
...  
Keyword(s):  
Satellite Observations ◽  
Earth Space ◽  
Near Earth Space ◽  
Wave Disturbances

Application of satellite observations for assessment of regional hydrological and hydrogeological risks

2011 ◽  
Vol 17 (6) ◽  
pp. 19-29
Author(s):  
Yu.V. Kostyuchenko ◽  
◽  
I.M. Kopachevskyi ◽  
D.M. Solovyov ◽  
M.V. Yushchenko ◽  
...  
Keyword(s):  
Satellite Observations
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