Talk:OMI AI G

OMI NO2 and Georgia/Florida Smoke Illustrations -- Rhusar Jul 16, 2007 1:10 AM

Hi, Following a request form Steve Young, we have prepared a simple screencast on the May 2007 Georgia/Florida smoke event which is also an Exceptional Event, subject of regulatory actions by Neil Frank & Co at OAQPS. Rich Scheffe and Rich Poirot may be interested in the multi sensor/network/organisational data integration. Frank Lindsay and Lawrence Friedl may like the use of satellite data for AQ analysis. The 1min 30sec GA/FL Smoke screencast is a flash file on our server and on YouTube. The Google Earth file with the corresponding data is here for those interested in recreational exploratory data analysis. Another 1 min 30 sec screencast is a preliminary OMI NO2 analysis, possibly useful for NOX emission verification. It is available as flash and YouTube video. The Google Earth file that was used for the recording is also here. Needless to say, the all data are accessible through GEOSS-compliant standard web services and being registered in the master GEOSS registry. Enjoy!

Re: OMI NO2 and Georgia/Florida Smoke Illustrations -- SYoung Jul 16, 2007 8:36 AM

Thanks Rudy. Just viewed it on YouTube -- excellent! Sorry I won't see you in person in Madison. Cheers,

Re: OMI NO2 and Georgia/Florida Smoke Illustrations -- FLindsay Jul 16, 2007 8:53 AM

Many thanks Rudy! I have sent these links around to all the atmospheric scientists here at HQ. This will further our work on exploring new uses for these data and how to best visualize them. Thanks to your team. best

Re: Re: OMI NO2 and Georgia/Florida Smoke Illustrations -- Rhusar Jul 16, 2007 2:31 PM

Frank, All: Thanks. Please think of these illustrations as evolving teasers. (The OMI-NO2 movie was just updated). If any of you have application ideas or wishes, please let us know. We are now idea-limited, particularly short of ideas from your diverse perspectives.

EPA Presentation -- SYoung Jul 27, 2007 10:27 AM

Dear WUSTLers: I am preparing a presentation for my political boss for next week and would like to show her some of the material but need to do it probably in static PowerPoint form. Could you please send me images as JPEGs or similar for key pieces, and if you have the videos in WMV format, the videos too? It appears that EPA has blocked YouTube or at least we have some security issue that seems to prevent viewing the videos in Flash or YouTube within our environment... (whereas I can view them at home with no problem!)

I'd like to see what I can package together to present in off-line mode next week; need whatever you can send ASAP, thanks, the actual briefing is Wednesday 8/1. Thanks!! Cheers,

Re: EPA Presentation -- Erin Robinson (ERobinson) 17:26, 30 July 2007 (EDT)

Steve, Here material for the OMI NO2 presentation :

• Images for monthly and daily aggregate screenshots on Google Earth are coded with first 3 letters of month/day and then the time period of aggregation.
• AVI Files OMI NO2 GA/FL Smoke
• KMZ file for Google Earth OMI NO2
• KMZ file for Google Earth/ GA FL Smoke

Re: EPA Presentation -- Rhusar Jul 29, 2007 6:28 PM

Hi Steve, In addition to what Erin has provided, for your consideration, I made another PPT slide (also attached) expanding on the utility of the OMI NO2 data for emission characterization.

NO2 Movie -- FLindsay 17:45, 30 July 2007 (EDT)

Hi Erin, many thanks for all your help with these cool NO2 movies. Any chance you could send Ernie the movie file directly... he wanted the highest quality (not u-tube) for a talk on Monday. He's been great in helping put forward this work in the broad AQ community. Here's his email... and thanks!!

Re: NO2 Movie -- Erin Robinson (ERobinson) 17:47, 30 July 2007 (EDT)

Hi Ernie, Here are links to a few versions of the OMI NO2 movie:

• AVI 800x600 and YouTube sized
• Flash

Let me know if you need these to be bigger or a different format

Problem in accessing OMI netCDF data from DataFed -- BCaron 16:47, 9 October 2007 (CDT)

Hi Rudy and Stefan, We are trying to pull OMI data via WCS as NetCDF files and are having some problems with the results. Who can we contact about this?

Re: Problem in accessing OMI netCDF data from DataFed -- Rhusar 21:49, 9 October 2007 (CDT)

Bruce, you can use this page to discuss dataset=related issues.

Re: Re: Problem in accessing OMI netCDF data from DataFed -- Marty Landsfeld (Mlandsfeld) 16:46, 10 October 2007 (EDT)

To be more specific, we are using the DataFed WCS service to download OMI data and it appears that all the values bogus. We have looked at the OMI_AI_G and OMI_AI_G_OL datasets NO2 variables and find that the values for NO2 are populated with missing values. The latitude and longitude variables look fine so I don't think it is a byte order problem. Here is a typical description output from an IDL script for a downloaded "NetCDF n-dim cube" file of OMI_AI_G data for day 2007-08-25:

IDL> netcdf_test, 'OMI_AI_G.20070825.TropAdv.nc', /cat_file

Dimensions 3

time 1

lat 720

lon 1440

Variables
time (DOUBLE ) Dimension Ids = [ 0 ]

Attribute long_name=Time

Attribute axis=T

Attribute units=milliseconds from 1970-01-01

lat (DOUBLE ) Dimension Ids = [ 1 ]

Attribute long_name=Latitude

Attribute axis=Y

Attribute units=degrees_north

lon (DOUBLE ) Dimension Ids = [ 2 ]

Attribute long_name=Longitude

Attribute axis=X

Attribute units=degrees_east

NO2Trop_adv (FLOAT ) Dimension Ids = [ 2 1 0 ]

Attribute units=�

Attribute _FillValue= -NaN

Attribute missing_value= -NaN

lat stats
double   mean      std dev      minimum      maximum   n_elements
      0.00000       51.998      -89.875       89.875   (720) = 720

lon stats:
double   mean      std dev      minimum      maximum   n_elements
      0.00000       103.96      -179.88       179.88   (1440) = 1440

NO2Trop_adv stats:<br />
float    mean      std dev      minimum      maximum   n_elements
         -NaN         -NaN         -NaN         -NaN   (1440,720) = 1036800