Search found 47 matches

by yaqiang
January 10th, 2020, 1:13 am
Forum: MeteoInfo Software
Topic: 3D trajectory and terrain
Replies: 0
Views: 22

3D trajectory and terrain

From MeteoInfo version 2.0, opengl supported 3D axes was implemented for better 3D data visualization. Following is an example to plot 3D trajectory and terrain. fn = 'D:/Temp/hysplit/output_850' f = addfile_hytraj(fn) tlayer = f.trajlayer() ls = tlayer.legend() for lb in ls.getLegendBreaks(): lb.se...
by yaqiang
January 10th, 2020, 1:05 am
Forum: MeteoInfo Software
Topic: Read and plot bdyfiles
Replies: 0
Views: 12

Read and plot bdyfiles

The HYSPLIT ./bdyfiles subdirectory contains ascii gridded terrain, land-use and roughness length data for Hysplit. Following is an example MeteoInfoLab script for reading and plotting terrain data file. #Read and plot HYSPLIT bdyfiles import re #Parameters slat = -90 #lat of lower left corner slon ...
by yaqiang
September 25th, 2019, 12:03 am
Forum: Trajectory Model
Topic: Regarding output of gdas1 trajectory output
Replies: 2
Views: 401

Re: Regarding output of gdas1 trajectory output

The meteoroogical variable data along the trajectoies can be extracted from gridded meteorological dataset according the positions of the trajectory endpoints. Here is an example MeteoInfoLab script: http://www.meteothink.org/examples/mete ... _data.html .
by yaqiang
May 14th, 2019, 11:07 am
Forum: MeteoInfo Software
Topic: Trouble With TrajStat Example
Replies: 1
Views: 952

Re: Trouble With TrajStat Example

It's hard to say why you got wrong result without detailed step description. The only suggestion at present is to use newest version of MeteoInfo and TrajStat if you are using old ones.
by yaqiang
May 3rd, 2019, 6:34 am
Forum: Conversion programs
Topic: Error while using grib2arl
Replies: 4
Views: 1344

Re: Error while using grib2arl

The website also provide 'Data Format Conversion' option for users to download the data as netcdf data format. Your data file looks like netcdf format with .nc postfix.
by yaqiang
April 10th, 2019, 9:49 pm
Forum: Users
Topic: Problem with emission location
Replies: 5
Views: 1102

Re: Problem with emission location

Wrong latitude of 63.333 in your figure. Correct one is 63.633.
by yaqiang
December 13th, 2018, 4:21 am
Forum: MeteoInfo Software
Topic: Fix the bug for HYSPLIT concentration data reading
Replies: 0
Views: 1920

Fix the bug for HYSPLIT concentration data reading

A bug exists in MeteoInfo for HYSPLIT output concentration data reading. The i, j index of non-zero elements can be read from data record 8, and the i, j index starting from 1 following Fortran language. MeteoInfo was developed using Java with 0 starting array, so the element positions were read inc...
by yaqiang
November 4th, 2018, 11:41 pm
Forum: MeteoInfo Software
Topic: Calculate trajectory length
Replies: 0
Views: 1687

Calculate trajectory length

An example for trajectory length calculation script was added in MeteoInfo website: http://meteothink.org/examples/meteoinf ... ength.html .
by yaqiang
November 1st, 2018, 4:06 am
Forum: MeteoInfo Software
Topic: How to calculate potential vorticity (PV) along the trajectory
Replies: 2
Views: 1210

Re: How to calculate potential vorticity (PV) along the trajectory

You can calculate PV array from the existing variables and than interpolate to the end point positions of the trajectories. There is a MPV example online (http://meteothink.org/examples/meteoinfolab/meteo_analysis/moisture_potential_vorticity.html). Replace pseudo-equivalent potential temperature to...
by yaqiang
October 26th, 2018, 11:31 am
Forum: MeteoInfo Software
Topic: Web domain changed to meteothink.org
Replies: 4
Views: 1371

Re: Web domain changed to meteothink.org

Great, thanks!