Type-Independent Calibration Method for Microwave Moisture Sensing in Unshelled and Shelled Peanuts

2009 ◽  
Author(s):  
Micah A Lewis ◽  
Samir Trabelsi ◽  
Stuart O Nelson ◽  
Ernest W Tollner
Keyword(s):  
Calibration Method ◽  
Independent Calibration ◽  
Moisture Sensing

scholarly journals Polar mesosphere summer echo strength in relation to solar variability and geomagnetic activity during 1997–2009

2011 ◽  
Vol 29 (3) ◽  
pp. 563-572 ◽  
Author(s):  
M. Smirnova ◽  
E. Belova ◽  
S. Kirkwood
Keyword(s):  
Lower Stratosphere ◽  
Calibration Method ◽  
Upper Troposphere ◽  
Annual Variations ◽  
K Index ◽  
Summer Echoes ◽  
Polar Mesosphere Summer Echoes ◽  
Energetic Particle Precipitation ◽  
Ionospheric Electric Field ◽  
Independent Calibration

Abstract. This paper is based on measurements of Polar Mesosphere Summer Echoes (PMSE) with the 52 MHz radar ESRAD, located near Kiruna, in Northern Sweden, during the summers of 1997–2009. Here, a new independent calibration method allowing estimation of possible changes in antenna feed losses and transmitter output is described and implemented for accurate calculation of year-to-year variations of PMSE strength (expressed in absolute units – radar volume reflectivity η). The method is based on radar-radiosonde comparisons in the upper troposphere/lower stratosphere region simultaneously with PMSE observations. Inter-annual variations of PMSE volume reflectivity are found to be strongly positively correlated with the local geomagnetic K-index, both when averaged over all times of the day, and when considering 3-h UT intervals separately. Increased electron density due to energetic particle precipitation from the magnetosphere is suggested as one of the possible reasons for such a correlation. Enhanced ionospheric electric field may be another reason but this requires further study. Multi-regression analysis of inter-annual variations of PMSE η shows also an anti-correlation with solar 10.7 cm flux and the absence of any statistically significant trend in PMSE strength over the interval considered (13-years). Variations related to solar flux and K-index account for 86% of the year-to-year variations in radar volume reflectivity.

Design of MFL Inspection Device for Underground Oil Tanks Based on Independent Calibration Method

2014 ◽  
Vol 511-512 ◽  
pp. 669-673
Author(s):  
Fu Jun Liu ◽  
Shuai Kong ◽  
Kai Ding ◽  
Mu Lin Zheng
Keyword(s):  
Signal Processing ◽  
Digital Signal ◽  
Calibration Method ◽  
Processing Method ◽  
Motor Drive ◽  
Signal Processing Method ◽  
Calibration Methods ◽  
Independent Calibration ◽  
Oil Tanks ◽  
The Impact

The underground oil tanks are usually ellipsoid shaped and horizontal placed, in order to inspect the underground oil tanks using MFL method, a magnetization structure contains three sub parts was designed for curvature plates, the impact by the uneven placement sensors was analyzed, a new channel independent calibration method was raised. The calibration method, as well as the digital signal processing method was programmed in the inspection software, then a motor drive walking device was designed, at last the inspection device was established. Through comparison of channel independent and identical calibration methods, the experiment result using channel independent calibration method has better precision of about 1/3 discovery rate.

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