Estimation of Precipitable Water Vapour Using Global Positioning System and Radio Occultation Over Ethiopian Regions

2021 ◽  
Author(s):  
Asmamaw Chanie Yehun ◽  
Tsegaye Kassa ◽  
Martin Vermeer ◽  
Addisu Hunegnaw
Keyword(s):  
Water Vapour ◽  
Global Positioning System ◽  
Radio Occultation ◽  
Precipitable Water ◽  
Positioning System ◽  
Precipitable Water Vapour ◽  
Global Positioning

scholarly journals Precipitable water vapour monitoring using ground based GPS system

MAUSAM ◽  
2021 ◽  
Vol 61 (2) ◽  
pp. 203-212
Author(s):  
N. PUVIARASAN ◽  
R. K. GIRI ◽  
MANISH RANALKAR
Keyword(s):  
Real Time ◽  
Water Vapour ◽  
Global Positioning System ◽  
Precipitable Water ◽  
Precipitable Water Vapour ◽  
Window Technique ◽  
Hourly Rainfall ◽  
Global Positioning ◽  
Gps System ◽  
Gps Observations

The sensing of near real time Precipitable Water Vapour (PWV) using Global Positioning System (GPS) over Indian region were analyzed.  GPS data collected from five stations at hourly interval were utilized to determine near real time PWV using GAMIT software. Sliding window technique was used to derive near real time PWV. The PWV determined from GPS observations of each site were compared with respective radiosonde measurements. The results shows that the derived GPS precipitable water well agree for some stations with the independent radiosonde measurements.  We have also examined the variation of hourly GPS-PWV with hourly rainfall observation and found that PWV increases significantly before the event take place and decreases after the event.  

Initial Results of Radio Occultation Observations of Earth's Atmosphere Using the Global Positioning System

Science ◽  
1996 ◽  
Vol 271 (5252) ◽  
pp. 1107-1110 ◽  
Author(s):  
E. R. Kursinski ◽  
G. A. Hajj ◽  
W. I. Bertiger ◽  
S. S. Leroy ◽  
T. K. Meehan ◽  
...  
Keyword(s):  
Global Positioning System ◽  
Radio Occultation ◽  
Positioning System ◽  
Earth’S Atmosphere ◽  
Global Positioning ◽  
Earth's Atmosphere ◽  
Initial Results

scholarly journals Bending Angle and Temperature Climatologies from Global Positioning System Radio Occultations

2013 ◽  
Vol 2013 ◽  
pp. 1-5
Author(s):  
R. Biondi ◽  
T. Neubert
Keyword(s):  
Spatial Resolution ◽  
Global Positioning System ◽  
Radio Occultation ◽  
Weather Forecast ◽  
Atmospheric Temperature ◽  
Positioning System ◽  
Water Vapour Content ◽  
Bending Angle ◽  
Convective Systems ◽  
Global Positioning

The Global Positioning System (GPS) Radio Occultation (OR) technique provides estimates of atmospheric density, temperature, and water vapour content with high vertical resolution, global coverage, and high accuracy. We have used data acquired using this technique in the period 1995–2009 to create a reference climatology of radio occultation bending angle and atmospheric temperature which are used for meteorological studies. The bending angle is interesting because it is a direct measurement and independent of models. It is given with one-degree spatial resolution and 50-meter vertical sampling. In addition, we give the temperature climatology with one-degree spatial resolution and 100-meter vertical sampling. This dataset can be used for several applications including weather forecast, physics of atmosphere, and climate changes. Since the GPS signal is not affected by clouds and the acquisitions are evenly distributed in the globe, the dataset is well suited for studying extreme events (such as convective systems and tropical cyclones) and remote areas.

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