38,291 research outputs found

    Ground truth data requirements for altimeter performance verification

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    The amount and type of ground truth required for an altimeter experiment is a function of the uncertainty in the satellite orbit, the altimeter error budget and the type of operation being performed. Ground truth requirements will be discussed with reference to three areas of operation: the global mode, the high intensity mode and calibration

    Analysis of GEOS-3 altimeter data and extraction of ocean wave height and dominant wavelength

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    When the amplitude and timing biases are removed from the GEOS-3 Sample and Hold (S&H) gates, the mean return waveforms can be excellently fitted with a theoretical template which represents the convolution of: (1) the radar point target response; (2) the range noise (jitter) in the altimeter tracking loop; (3) the sea surface height distribution; and (4) the antenna pattern as a function of the range to mean sea level. Several techniques of varying complexity to remove the effect of the tracking loop jitter in computing the wave height are considered. They include: (1) realigning the S&H gates to their actual positions with respect to mean sea level before averaging; (2) using the observed standard deviation on the altitude measurement to remove the integrated effect of the tracking loop jitter, and (3) using a look-up table to correct for the expected value of range noise. Analysis of skewness in the GEOS return waveform demonstrates the potential of a satellite radar altimeter to determine the dominant wavelength of ocean waves

    Efficent estimation of distribution for extreme observations in sample and nonsample cases Progress report, period ending 31 Dec. 1968

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    Estimation of distribution for extreme observations in sample and nonsample case

    THEMIS signal analysis statistics research program - Development and analysis of modified paired comparisons by use of linearized nonlinear regression

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    Curve fitting for modified paired comparisons using linearized nonlinear regressio

    Sample sizes for approximate independence of largest and smallest order statistics

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    Sample sizes for approximate independence of largest and smallest order statistic

    Identification of situations where cooperation is preferable to use of median game theory

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    Identification of situations where cooperation is preferable to median game theory - Themis projec

    Chance of all success for independent binomial events with large success probabilities

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    Independent binomial events reliability with large success probabilitie

    Approximate intervals and tests for products and ratios of binomial probabilities

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    Approximate confidence interval and tests for products and ratios of binomial probabilities with application in investigating and comparing system reliabilitie

    Generally applicable solutions for two person median game theory

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    Optimum solutions for two person median game theor

    Exact intervals and tests for median when one sample value possibly an outlier

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    Confidence intervals and significance tests for mean of symmetrical population with outlier observation not largest or smalles
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