GNSS Precipitable Water Vapor from an Amazonian Rain Forest Flux Tower
Signals
Rainforest
Processing Technique
Gnss
Precipitation Intensity
Satellites
Rain
Convective System
Gps
Convective Storms
0207 environmental engineering
02 engineering and technology
Processing Method
Processing
Precipitation Assessment
01 natural sciences
Meso Scale
Mesoscale Process
Rain Forests
Amazonia
Global Positioning System
Mesoscale Networks
Vertical Distributions
Complex Interaction
Nonideal
Temporal Variation
Instrumentation/sensors
0105 earth and related environmental sciences
Mesoscale Meteorology
Geodetic Satellites
Natural Convection
Navigation Systems
Sensors
Accuracy Assessment
Navigational Satellites
Gnss Receivers
Forestry
Deep Convection
Positioning System
Signal Receivers
Water Vapor
Precipitable Water Vapor
Oscillating Platform
Spatial Resolution
13. Climate action
Water Vapor Fields
Amazon Rainforest
Geodesy
DOI:
10.1175/jtech-d-11-00082.1
Publication Date:
2011-08-05T17:22:58Z
AUTHORS (3)
ABSTRACT
Abstract
Understanding the complex interactions between water vapor fields and deep convection on the mesoscale requires observational networks with high spatial (kilometers) and temporal (minutes) resolution. In the equatorial tropics, where deep convection dominates the vertical distribution of the most important greenhouse substance—water—these mesoscale networks are nonexistent. Global Navigational Satellite System (GNSS) meteorological networks offer high temporal/spatial resolution precipitable water vapor, but infrastructure exigencies are great. The authors report here on very accurate precipitable water vapor (PWV) values calculated from a GNSS receiver installed on a highly nonideal Amazon rain forest flux tower. Further experiments with a mechanically oscillating platform demonstrate that errors and biases of approximately 1 mm (2%–3% of PWV) can be expected when compared with a stable reference GNSS receiver for two different geodetic grade receivers/antennas and processing methods [GPS-Inferred Positioning System (GIPSY) and GAMIT]. The implication is that stable fixed antennas are unnecessary for accurate calculation of precipitable water vapor regardless of processing techniques or geodetic grade receiver.
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