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The third method of height determination depends on measurements of atmospheric pressure differences with a sensitive aneroid barometer, which can respond to pressure differences small enough to correspond to a foot or two (0.3 to 0.6 metre) in height.
For faster work in hilly areas, where lower accuracies usually are acceptable, trigonometric height determination is employed using a theodolite to measure vertical angles and measuring or calculating the distances by triangulation.
We use geoid models developed with geoid heights for the height transformation, because orthometric height determination methods using classical techniques require time and manpower.
The application of GNSS for height determination using a precise geoid model is desired.
Observed gravity data at the benchmark points would improve the accuracy of rigorous orthometric height determination.
This means that the SNR is lower and thus the reflector height determination is more difficult using the L2 signals.
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These comparisons contribute to the validation of these data products by detecting systematic deviations, for example, wrong tangent height determinations, spectroscopic errors, and others.
Weight and height determinations will be performed using an electronic scale (model 200/5; Welmy Industria e Comercio Ltda, São Paulo, Brazil), and the BMI will be calculated [ 16].
Predictions of dry beach morphologies are extensively required in coastal research for multiple purposes -e.g., dune erosion forecasting, inundation heights determination and beach fill design optimization.
This instrument together with other state-of-the-art technologies involved in the mission, led to sea-height determinations with precision better than 2 cm.
The experimental programme, carried out in a bubble column reactor of 0.14 m in diameter and 4.1 m in height, included determination of gas and liquid phase residence time distribution (RTD) characteristics for different modes of primary gas dispersion and flow visualisation experiments aimed at identification of macro-scale flow patterns in the reactor.
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