[Met_help] [rt.rap.ucar.edu #100112] History for sample data
John Halley Gotway via RT
met_help at ucar.edu
Mon Jun 7 08:44:44 MDT 2021
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Initial Request
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Hello,
I am wondering where to find the sample data "GOES-16 AOD data"
(OR_ABI-L2-AODC-M3_G16_s20181341702215_e20181341704588_c20181341711418.nc)
which is used for point2grid in MET documentation? I can not find that from
WCOSS.
I want to look at the example to confirm my test. I noticed that after
using point2grid, the dimension of the variables in the header files
decreased 1. E.g:
header of my original file:
dimensions:
time = 1 ;
y = 321 ;
x = 345 ;
variables:
int64 time(time) ;
time:standard_name = "time" ;
time:units = "days since 2020-10-22 05:00:00" ;
time:calendar = "proleptic_gregorian" ;
float latitude(y, x) ;
latitude:_FillValue = -999.f ;
latitude:standard_name = "latitude" ;
latitude:long_name = "Latitude of the pixel center" ;
latitude:units = "degrees_north" ;
float longitude(y, x) ;
longitude:_FillValue = -999.f ;
longitude:standard_name = "longitude" ;
longitude:long_name = "Longitude of the pixel center" ;
longitude:units = "degrees_east" ;
float ash_mass_loading(time, y, x) ;
ash_mass_loading:_FillValue = 0.f ;
ash_mass_loading:coordinates = "latitude longitude" ;
after converting using point2grid, the new header is:
dimensions:
lat = 200 ;
lon = 200 ;
variables:
float lat(lat) ;
lat:long_name = "latitude" ;
lat:units = "degrees_north" ;
lat:standard_name = "latitude" ;
float lon(lon) ;
lon:long_name = "longitude" ;
lon:units = "degrees_east" ;
lon:standard_name = "longitude" ;
float ash_mass_loading(lat, lon) ;
ash_mass_loading:name = "ash_mass_loading" ;
ash_mass_loading:long_name = "Mean Value of ash_mass_loading(0,*,*)" ;
ash_mass_loading:level = "ANA" ;
ash_mass_loading:units = "NA" ;
ash_mass_loading:_FillValue = -9999.f ;
ash_mass_loading:init_time = "20201021_230000" ;
ash_mass_loading:init_time_ut = "1603321200" ;
ash_mass_loading:valid_time = "20201021_230000" ;
ash_mass_loading:valid_time_ut = "1603321200" ;
ash_mass_loading:accum_time = "NA" ;
ash_mass_loading:accum_time_sec = -9999
Is this correct? Thank you.
Binyu
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Complete Ticket History
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Subject: sample data
From: John Opatz
Time: Fri Jun 04 12:59:10 2021
Hi Binyu,
I found the example you're referencing in the Point2Grid documentation
in
the MET User's Guide. However, I'm not certain that file is in our
test
data.
As for your loss of 1 dimension, I think that's the correct behavior
of the
tool. In the User's Guide, the Point2Grid entry
<https://met.readthedocs.io/en/main_v10.0/Users_Guide/reformat_point.html#point2grid-
output>
states that a 2D time variable will have the latest observation time
is the
saved time, and if "valid_time" is configured, that will be saved into
the
output file (which it looks like you utilized).
I'm going to redirect your question to John HG, who will be able to
answer your questions more fully.
-John O.
On Fri, Jun 4, 2021 at 10:52 AM binyu.wang at noaa.gov via RT <
met_help at ucar.edu> wrote:
>
> Fri Jun 04 10:51:37 2021: Request 100112 was acted upon.
> Transaction: Ticket created by binyu.wang at noaa.gov
> Queue: met_help
> Subject: sample data
> Owner: Nobody
> Requestors: binyu.wang at noaa.gov
> Status: new
> Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=100112 >
>
>
> Hello,
>
> I am wondering where to find the sample data "GOES-16 AOD data"
> (OR_ABI-L2-AODC-
M3_G16_s20181341702215_e20181341704588_c20181341711418.nc)
> which is used for point2grid in MET documentation? I can not find
that from
> WCOSS.
>
> I want to look at the example to confirm my test. I noticed that
after
> using point2grid, the dimension of the variables in the header files
> decreased 1. E.g:
>
> header of my original file:
>
> dimensions:
>
> time = 1 ;
>
> y = 321 ;
>
> x = 345 ;
>
> variables:
>
> int64 time(time) ;
>
> time:standard_name = "time" ;
>
> time:units = "days since 2020-10-22 05:00:00" ;
>
> time:calendar = "proleptic_gregorian" ;
>
> float latitude(y, x) ;
>
> latitude:_FillValue = -999.f ;
>
> latitude:standard_name = "latitude" ;
>
> latitude:long_name = "Latitude of the pixel center"
;
>
> latitude:units = "degrees_north" ;
>
> float longitude(y, x) ;
>
> longitude:_FillValue = -999.f ;
>
> longitude:standard_name = "longitude" ;
>
> longitude:long_name = "Longitude of the pixel
center" ;
>
> longitude:units = "degrees_east" ;
>
> float ash_mass_loading(time, y, x) ;
>
> ash_mass_loading:_FillValue = 0.f ;
>
> ash_mass_loading:coordinates = "latitude longitude"
;
>
>
> after converting using point2grid, the new header is:
>
> dimensions:
>
> lat = 200 ;
>
> lon = 200 ;
>
> variables:
>
> float lat(lat) ;
>
> lat:long_name = "latitude" ;
>
> lat:units = "degrees_north" ;
>
> lat:standard_name = "latitude" ;
>
> float lon(lon) ;
>
> lon:long_name = "longitude" ;
>
> lon:units = "degrees_east" ;
>
> lon:standard_name = "longitude" ;
>
> float ash_mass_loading(lat, lon) ;
>
> ash_mass_loading:name = "ash_mass_loading" ;
>
> ash_mass_loading:long_name = "Mean Value of ash_mass_loading(0,*,*)"
;
>
> ash_mass_loading:level = "ANA" ;
>
> ash_mass_loading:units = "NA" ;
>
> ash_mass_loading:_FillValue = -9999.f ;
>
> ash_mass_loading:init_time = "20201021_230000" ;
>
> ash_mass_loading:init_time_ut = "1603321200" ;
>
> ash_mass_loading:valid_time = "20201021_230000" ;
>
> ash_mass_loading:valid_time_ut = "1603321200" ;
>
> ash_mass_loading:accum_time = "NA" ;
>
> ash_mass_loading:accum_time_sec = -9999
>
>
> Is this correct? Thank you.
>
>
> Binyu
>
>
--
John Opatz
Associate Scientist III
NCAR RAL and DTC
Boulder, Colorado
+1 303-497-8305
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Subject: sample data
From: John Halley Gotway
Time: Fri Jun 04 18:42:23 2021
Binyu,
I was able to locate that file in our test dataset and have included
it,
along with similar ones, in this tarfile:
ftp.rap.ucar.edu/incoming/irap/met_help/for_binyu.tar.gz
Thanks,
John
On Fri, Jun 4, 2021 at 1:00 PM John Opatz via RT <met_help at ucar.edu>
wrote:
>
> Fri Jun 04 13:00:04 2021: Request 100112 was acted upon.
> Transaction: Given to johnhg (John Halley Gotway) by jopatz
> Queue: met_help
> Subject: sample data
> Owner: johnhg
> Requestors: binyu.wang at noaa.gov
> Status: open
> Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=100112 >
>
>
> This transaction appears to have no content
>
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