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11/18/2017 4:32 pm  #1


ASCAT data display / overlay

Hello all,

Following VOR closely and one of the nice things is that the other forums, race experts, etc. show interesting ways different software is used.  There was a recent discussion on one of them re ASCAT use (using squid I believe), and seemed to show overlaying ASCAT on top of a grib forecast. I can see this as being quite useful.

Is there some way of doing this on Expedition? I see there is an ASCAT download option under weather/My grib/NOAA OPC/ASCAT but it's not documented in help file, and I have not been able to get anything from there.

 

11/19/2017 11:58 am  #2


Re: ASCAT data display / overlay

I think the NOAA ones might only be for the US and central America.

​We used to download the images noaa during races, but they cover small areas to aren't in MyImage yet.

 

11/22/2017 5:03 pm  #3


Re: ASCAT data display / overlay

Thanks Nick.

Just closing the loop.  Tinkering about a bit more found that the scatterometer data had to be "turned on" in order to display under weather/settings.  The download from OPC is working well, and seems to cover worldwide 67N to 67S, in swaths. 


 

     Thread Starter
 

3/18/2018 8:25 am  #4


Re: ASCAT data display / overlay

Nick,
I've been looking at ASCAT off the east coast of the US.  Expedition MyGrib-> NOAA OPC->ASCAT appears to be downloading ASCAT METOP A Descending pass.  Yet there are more scatterometer winds for ascending pass as well as ascending and descending from ASCAT METOP B.  I haven't look for the raw data to see how easy it is to get these in grib format.  Any plans to add these additional Scatterometer winds?  Or am I reading the data incorrectly in Expedition and it is already included?  I find the winds over the gulf stream area a valuable tool.

 

3/18/2018 4:47 pm  #5


Re: ASCAT data display / overlay

Exp can display the scatwind data on top of the model winds. The tooltip should give the time for each wind barb if the time data is in the grib file.

This is the data retrieved by Exp

http://ftp.opc.ncep.noaa.gov/data/ascat_ab/

 

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