نتایج جستجو برای: height observations from ground

تعداد نتایج: 5841205  

ژورنال: فیزیک زمین و فضا 2020

A new approach with the ability to use the multiple observations based on the least square approach has been proposed for initial orbit determination. This approach considers the Earth’s Oblateness by using the developed Lagrange coefficients. The efficiency of the proposed method has been tested in two scenarios. The first scenario is to use the simulated and the second one is to utilize the r...

Ahmadreza Mohamadnia Amin Khaghani,

Wide variety of timings and techniques has been used based on the housing, production, availability of requirements etc. This current study was done for a morphologic evaluation of the cow's digit in different trimming times. A dairy herd with 2200 milking cow, free stalls barns, average daily production of 36 liters per cow was selected. Forty cows were assigned to four groups based on hoof tr...

2005
F.-L. Chang

The overlapping of high-level cirrus cloud and low-level stratus cloud has posed a major challenge in determining their cloud top altitudes using passive satellite observations. Chang and Li (2005) present a novel satellite retrieval method that takes advantage of the Moderate Resolution Imaging Spectroradiometer (MODIS) data to detect the presence of overlapped cirrus and stratus clouds and de...

1997
Charles B. Callaway James C. Lester

2. A b s t r a c t D iscou rse R e v i s i o n : I t iteratively applies revision operators to the abstract discourse plan to create a draft tree, where each node is a draft that was derived from its parent by applying a revision operator. Figure 4: Example sentential specification 3. D iscourse P l a n G r o u n d i n g : I t reconstitutes abstract discourse plans as ground level discourse pla...

2001
Craig Roberts

The UNSW-designed GPS volcano monitoring system installed on Gunung Papandayan seeks to characterise the ground deformation within the volcanic edifice. Hourly baseline solutions produce a time series of data designed to detect any ground motion. Differential tropospheric effects between GPS receivers separated by a large change in height (in this case up to 1400m) impact on the quality of this...

2009
N. M. Pedatella J. Lei K. M. Larson J. M. Forbes

[1] The long-duration positive ionospheric storm effect that occurred on 15 December 2006 is investigated using a combination of ground-based Global Positioning System (GPS) total electron content (TEC), TOPEX and Jason-1 TEC, and topside ionosphere/ plasmasphere TEC, GPS radio occultation, and tiny ionospheric photometer (TIP) observations from the Constellation Observing System for Meteorolog...

2015
E. Andersson M. Kahnert A. Devasthale

Hemispheric transport of air pollutants can have a significant impact on regional air quality, as well as on the effect of air pollutants on regional climate. An accurate representation of hemispheric transport in regional chemical transport models (CTMs) depends on the specification of the lateral boundary conditions (LBCs). This study focuses on the methodology for evaluating LBCs of two mode...

2007
Michal Havlena

City models are needed in many areas of human activities including urban planning, virtual reality, and architecture preservation. Aerial, ground level, and omnidirectional city modeling techniques are compared and their main advantages and disadvantages are presented. We also show several city modeling systems and address their novelties as well as their limitations. Next, we present our previ...

2003
C. A. Hall H. J. Cassaday A. M. Derrington

This study investigated the effect of stimulus height on the ability of horses to learn a simple visual discrimination task. Eight horses were trained to perform a two-choice, black/white discrimination with stimuli presented at one of two heights: ground level or at a height of 70 cm from the ground. The height at which the stimuli were presented was alternated from one session to the next. Al...

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