[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[McIDAS #SKX-144523]: himawari data tranfers from open archive



Hi again Nick,

I just loaded the most recent Himawari full disk Band 3 image from the UW/SSEC
Data Center both directly from the remote ADDE server and then copied a sector
to a local AREA file, and then interrogated both for the value of a pixel to
see what units were returned.  Here is what was returned by McIDAS for
the image served via ADDE:

IMGDISP HIMAWARI/FD.248 BAND=3 LAT=-17 180
Beginning Image Data transfer, bytes= 1131040
IMGDISP: loaded frame  1
IMGDISP: done
 
 Frame    Latitude    Longitude    Tvline    Tvelem    Line    Elem
     1   -17:07:44   -179:51:45      487       589    14547   18336
 

     Image Name           Day      Nominal Time   Scan Time    Band
  ----------------      -------    ------------   ---------    ----
  HIMAWARI/FD.248     29 Feb 16060   17:50:00      17:56:39       3

                        File     Nominal  Image     RAW         RAD         ALB 
        BRIT
       Lat/Lon      Line/Element  Line/Element                   *          %
-17:07:44/-179:51:45 14546/18335   14547/18336             32       3.665       
 0.70          21
 *   watts/meter**2/steradian/micron

IMGPROBE: Done

This shows that the McIDAS-returned unit for radiance is:

watts/meter**2/steradian/micron

This agrees with what you included as the JAXA listed radiance in
a previous email:

Posted on: 20160227.1228 MST
"The Himawari documenation from JAXA claims the computation is:

Radiance W/(m^2 sr um)"

Additionally, the units listed when interrogating the local AREA
file that I created using IMGCOPY were/are the same as that
returned from the remote ADDE server.

NB: the tests I ran used a version of McIDAS-X, v2016, that I am
currently prepping for release.

Cheers,

Tom
--
****************************************************************************
Unidata User Support                                    UCAR Unidata Program
(303) 497-8642                                                 P.O. Box 3000
address@hidden                                   Boulder, CO 80307
----------------------------------------------------------------------------
Unidata HomePage                       http://www.unidata.ucar.edu
****************************************************************************


Ticket Details
===================
Ticket ID: SKX-144523
Department: Support McIDAS
Priority: Normal
Status: Closed


NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.