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