Design and performance of a high-stability water vapor radiometer

Radio Science ◽  
2003 ◽  
Vol 38 (3) ◽  
pp. n/a-n/a ◽  
Author(s):  
Alan B. Tanner ◽  
A. Lance Riley
Keyword(s):  
Water Vapor ◽  
High Stability ◽  
Water Vapor Radiometer ◽  
And Performance

scholarly journals Development of a high-stability water vapor radiometer

Radio Science ◽  
1998 ◽  
Vol 33 (2) ◽  
pp. 449-462 ◽  
Author(s):  
Alan B. Tanner
Keyword(s):  
Water Vapor ◽  
High Stability ◽  
Water Vapor Radiometer

The Seoul Water Vapor Radiometer for the Middle Atmosphere: Calibration, Retrieval, and Validation

2011 ◽  
Vol 49 (3) ◽  
pp. 1052-1062 ◽  
Author(s):  
Evelyn De Wachter ◽  
Alexander Haefele ◽  
Niklaus Kampfer ◽  
Soohyun Ka ◽  
Jung Eun Lee ◽  
...  
Keyword(s):  
Water Vapor ◽  
Middle Atmosphere ◽  
Water Vapor Radiometer

Pointed water vapor radiometer corrections for accurate global positioning system surveying

1993 ◽  
Vol 20 (23) ◽  
pp. 2635-2638 ◽  
Author(s):  
Randolph Ware ◽  
Christian Rocken ◽  
Fredrick Solheim ◽  
Teresa Van Hove ◽  
Chris Alber ◽  
...  
Keyword(s):  
Water Vapor ◽  
Global Positioning System ◽  
Positioning System ◽  
Global Positioning ◽  
Water Vapor Radiometer

scholarly journals Methods of Correction for the “Wet” Atmosphere in Estimating Baseline Lengths from VLBI

1988 ◽  
Vol 129 ◽  
pp. 543-544
Author(s):  
G. Elgered ◽  
J. L. Davis ◽  
T. A. Herring ◽  
I. I. Shapiro
Keyword(s):  
Water Vapor ◽  
Propagation Delay ◽  
Propagation Path ◽  
Baseline Length ◽  
Space Observatory ◽  
Owens Valley ◽  
Use Of Data ◽  
Onsala Space Observatory ◽  
Vlbi Data ◽  
Water Vapor Radiometer

The error in VLBI estimates of baseline length caused by unmodelled variations in the propagation path through the atmosphere is greater for longer baselines. We present and discuss series of estimates of baseline lengths obtained using different methods to correct for the propagation delay caused by atmospheric water vapor. The main methods are use of data from a water-vapor radiometer (WVR) and Kalman-filtering of the VLBI data themselves to estimate the propagation delay. Since the longest timespan of WVR data associated with geodetic VLBI experiments was obtained at the Onsala Space Observatory in Sweden, we present results for the following three baselines: (1) Onsala–Wettzell, FRG (920 km), (2) Onsala–Haystack/Westford, MA (5600 km), and (3) Onsala–Owens Valley (7914 km).

scholarly journals Diode-pumped single-frequency-Nd:YGG-MOPA for water–vapor DIAL measurements: design, setup and performance

2010 ◽  
Vol 102 (4) ◽  
pp. 917-935 ◽  
Author(s):  
J. Löhring ◽  
A. Meissner ◽  
D. Hoffmann ◽  
A. Fix ◽  
G. Ehret ◽  
...  
Keyword(s):  
Water Vapor ◽  
Single Frequency ◽  
Diode Pumped ◽  
And Performance

scholarly journals MIAWARA-C, a new ground based water vapor radiometer for measurement campaigns

2010 ◽  
Vol 3 (3) ◽  
pp. 2389-2432
Author(s):  
C. Straub ◽  
A. Murk ◽  
N. Kaempfer
Keyword(s):  
Water Vapor ◽  
Middle Atmosphere ◽  
Horn Antenna ◽  
Profile Measurement ◽  
Correlation Receiver ◽  
Water Vapor Radiometer ◽  
Set Up ◽  
Compact Design ◽  
Crucial Parameter ◽  
Measurement Campaigns

Abstract. In this paper a new 22 GHz water vapor spectro-radiometer which has been specifically designed for profile measurement campaigns of the middle atmosphere is presented. The instrument is of a compact design and has a simple set up procedure. It can be operated as a standalone instrument as it maintains its own weather station and a calibration scheme that does not rely on other instruments or the use of liquid nitrogen. The optical system of MIAWARA-C combines a choked gaussian horn antenna with a parabolic mirror which reduces the size of the instrument in comparison with currently existing radiometers. For the data acquisition a correlation receiver is used together with a digital cross correlating spectrometer. The complete backend section, including the computer, is located in the same housing as the instrument. The receiver section is temperature stabilized to avoid gain fluctuations. Calibration of the instrument is achieved through a balancing scheme with the sky used as the cold load and the tropospheric properties are determined by performing regular tipping curves. Since MIAWARA-C is used in measurement campaigns it is important to be able to determine the elevation pointing in a simple manner as this is a crucial parameter in the calibration process. Here we present two different methods; scanning the sky and the Sun. Finally, we report on the first spectra and retrieved water vapor profiles acquired during the Lapbiat campaign at Sodankylä Geophysical Observatory. The performance of MIAWARA-C is validated here by comparison of the presented profiles against the equivalent profiles from the Microwave Limb Sounder on the EOS/Aura satellite.

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