1. Atmosphere parameters on 2002.05.21_00:00 from NCEP

Geopotential height at 200 mbar	reanalisys	operational
Surface pressure	reanalisys	operational
Ratios of humidity integrals	reanalisys	operational

2. Average and rms of the differences in meteorological parameters from NCEP reanalysis and NCEP operational model in 2002.04

Geopotential height at 200 mbar	average	rms	rms = 14.9 m
Ratio of humidity integrals	average	rms	rms = 0.27
Surface pressure	average	rms	rms = 137 Pa

NCEP reanalysis model has a resolution 2.5x2.5 degrees, NCEP operational model has a resolution 1x1 degrees. I used a grid 5x5 degrees in which both models has common nodes. I did not try interpolate NCEP reanalysis model. I've also excluded near polar regions, with latitude higher than -+ 80 degrees in computing rms and average, since quality of models is supposed to be significantly worse there. But there are no VLBI and GPS sites there.

3. Animated movie of meteorological parameters evolution from NCEP operational and NCEP reanalysis models in 2002.04

Geopotential height at 200 mbar	NCEP operational model	NCEP reanalysis model
Ratio of humidity integrals	NCEP operational model	NCEP reanalysis model
Surface pressure	NCEP operational model	NCEP reanalysis model

4. Expression for IMF(h):

   
   

   

5. Expression for IMF(w):

   
   

6. Meteorological parameters above some stations.

   Smoothing is done by boxcar filter with the 60 day width window.

   NYALES20	WESTFORD	FORTLEZA	HARTRAO
   Geopotential height at 200 mbar	Geopotential height at 200 mbar	Geopotential height at 200 mbar	Geopotential height at 200 mbar
   Geopotential height (smoothed)	Geopotential height (smoothed)	Geopotential height (smoothed)	Geopotential height (smoothed)

   NYALES20	WESTFORD	FORTLEZA	HARTRAO
   East normal to gph surface	East normal to gph surface	East normal to gph surface	East normal to gph surface
   East normal to gph surface (smoothed)	East normal to gph surface (smoothed)	East normal to gph surface (smoothed)	East normal to gph surface (smoothed)

   NYALES20	WESTFORD	FORTLEZA	HARTRAO
   North normal to gph surface	North normal to gph surface	North normal to gph surface	North normal to gph surface
   North normal to gph surface (smoothed)	North normal to gph surface (smoothed)	North normal to gph surface (smoothed)	North normal to gph surface (smoothed)

   NYALES20	WESTFORD	FORTLEZA	HARTRAO
   Ratio of humidity integrals	Ratio of humidiy intergrals	Ratio of humidiy intergrals	Ratio of humidiy intergrals
   Ratio of humidity integrals (smoothed)	Ratio of humidiy intergrals (smoothed)	Ratio of humidiy intergrals (smoothed)	Ratio of humidiy intergrals (smoothed)

7. Difference in path delay at 10 degrees elevation angle IMF(h) - NMF(h).

   Smoothing is done by boxcar filter with the 60 day width window.

   NYALES20	WESTFORD	FORTLEZA	HARTRAO
   IMF(h)-NMF(h) at 10 deg elevation	IMF(h)-NMF(h) at 10 deg elevation	IMF(h)-NMF(h) at 10 deg elevation	IMF(h)-NMF(h) at 10 deg elevation
   IMF(h)-NMF(h) at 10 deg elevation (smoothed)	IMF(h)-NMF(h) at 10 deg elevation (smoothed)	IMF(h)-NMF(h) at 10 deg elevation (smoothed)	IMF(h)-NMF(h) at 10 deg elevation (smoothed)

8. Excess path delay at HARTRAO

   Smoothing is performed by boxcar filter with the 60 day width window.
   • Plot of the difference of path delay at 10^o and azimuth 0^o IMF(h) - NMF(h)
   
   
   • Plot of the difference of path delay at 10^o and IMF(h) - NMF(h). Normal to geopotential height was artificially set to zero.
   
   
   • Difference of path delay at 10^o and azimuth 0^o IMF(h) - NMF(h)
   
   
   • Plot of the difference of path delay at 10^o IMF(w) - NMF(w).
   
   

9. Excess path delay at KOKEE

   Smoothing is performed by boxcar filter with the 60 day width window.
   • Plot of the difference of path delay at 10^o and azimuth 0^o IMF(h) - NMF(h)
   
   
   • Plot of the difference of path delay at 10^o and IMF(h) - NMF(h). Normal to geopotential height was artificially set to zero.
   
   
   • Difference of path delay at 10^o and azimuth 0^o IMF(h) - NMF(h)
   
   
   • Plot of the difference of path delay at 10^o IMF(w) - NMF(w).
   
   

IMFG_N (Inclination of the normal to the 200 mbar geopotential height surface in north direction)

TSUKUB32

WESTFORD

WETTZELL

IMFG_E (Inclination of the normal to the 200 mbar geopotential height surface in east direction)

TSUKUB32

WESTFORD

WETTZELL

Mapping function at 10 degrees elevation in North direction

Without gradients:

With gradients:

Differences in positions of sources in solutions with IMFh+IMFg versus solutions with NMF2

1. Plot of Delta Delta versus declination.
2. Plot of Delta Delta versus right ascension.
3. Plot of Delta Alpha*cos(delta) versus right ascension.

Last update: 23-APR-2004 19:51:35