Systematic errors in ground heat flux estimation and their correction

Systematic errors in ground heat flux estimation and their correction

[1] Incoming radiation forcing at the land surface is partitioned among the components of the surface energy balance in varying proportions depending on the time scale of the forcing. Based on a land-atmosphere analytic continuum model, a numerical land surface model, and field observations we show that high-frequency fluctuations in incoming radiation (with period less than 6 h, for example, d...

Inverse Estimation of Boundary Heat Flux for Heat Conduction Model

Mathematical model of direct and inverse problems is developed for the flat plate probe which is subjected to timedependent heat flux at one end, while the other end is kept insulated. The direct solution, which is concerned with determination of the temperature distribution in the probe, is developed using an approach based on the method of variation of parameters. The direct solution is used ...

The Measurement of Heat Flow in the Ground and the Theory of Heat Flux Meters

Measurement and correction of systematic odometry errors in mobile robots

Odometry is the most widely used method for determining the momentary position of a mobile robot. In most practical applications odometry provides easily accessible real-time positioning information in-between periodic absolute position measurements. The frequency at which the (usually costly and/or time-consuming) absolute measurements must be performed depends to a large degree on the accurac...

Digital Estimation and Correction of DAC Errors in Multibit ADCs

An adaptive digital algorithm is described for acquiring and correcting the errors of the feedback DAC used in a multibit ADC. The method is highly accurate, and is particularly useful for wideband ADCs, where mismatch error shaping becomes ineffective.