[noaaport] Has anyone seen problems with GOES-R mesoscale sector Z?

• To: "noaaport@xxxxxxxxxxxxxxxx" <noaaport@xxxxxxxxxxxxxxxx>
• Subject: [noaaport] Has anyone seen problems with GOES-R mesoscale sector Z?
• From: Gary Lucas <gwlucas@xxxxxxxxxxxxx>
• Date: Thu, 16 Mar 2017 12:35:32 -0400

Has anyone else seen problems with the GOES-R mesoscale sector Z messages 
issued under the WMO header TISZ?   Alternately, does anyone have suggestions 
about what I might be doing wrong?

This data appears to be a tiled product in which the sector is divided into 6 
tiles.  This morning I attempted to plot data for this sector in an application 
I am writing, but the result was that the tiles overlapped and half of them 
appear to be located in the wrong place.

My code is depending on the metadata elements for tile_row_offset and 
tile_column_offset.  The image is given in Mercator projection and appears to 
have 2 rows of 3 tiles each. However, I suspect that these are not being 
correctly populated.  The table below shows that the row offsets for all six 
files were given as zero.  The latitude/longitude bounds shown below were 
computed by my code using the metadata, but the row/col offsets are exactly as 
taken from the file (I confirmed their values using NASA's Panoply 
application).  

I was successful in mapping data from large-scale sector P, which was also in 
Mercator projection and other tiled sectors that were given in the Lambert 
Conformal Conic projection. So I think my algorithms are ballpark correct.

Thanks,

Gary



File                            Bounds derived from metadata            row/col 
offsets
                                Min_lat  max_lat  min_lon  max_lon      row  col
TISZ03_KNES_161257              -22.544  -10.942  -24.236  -12.097      0   2048
TISZ03_KNES_161257_001  -22.544  -10.942  -36.375  -24.236      0   1024
TISZ03_KNES_161257_002  -22.544  -10.942  -48.514  -36.375      0      0
TISZ03_KNES_161257_003  -23.865  -12.081  -49.170  -36.754      0      0
TISZ03_KNES_161257_004  -23.865  -12.081  -24.339  -11.923      0   2048
TISZ03_KNES_161257_005  -23.865  -12.081  -36.754  -24.339      0   1024