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The use of a numerical filter to correct airborne temperature measurements for the effects of sensor lagA numerical filter for transforming measured temperature signals into a close approximation of the actual temperature signal is described. The filter is derived by minimizing the mean-square error of the system, and assuming a knowledge of the characteristics of the sensing element and its housing. The equation representing the frequency-response function of the numerical filter is given. Input and output spectra for a filter applied to a case with negligible noise and a noise level of 1.5 percent of the total power in the input spectrum are analyzed, and the numerical weights for these two cases are calculated. Phase angle and gain for the entire system are examined. It is noted that the filter can enhance spectral components as high as 8 Hz with little phase and gain degradation over the bandwidth.
Document ID
19870054910
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Ritter, John A.
(NASA Langley Research Center Hampton, VA, United States)
Smith, G. Louis
(NASA Langley Research Center Hampton, VA, United States)
Cahoon, Donald R.
(OAO Corp. Hampton, VA, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1987
Subject Category
Aircraft Instrumentation
Accession Number
87A42184
Distribution Limits
Public
Copyright
Other

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