[noaaport] Question about lifted index product

• To: noaaport@xxxxxxxxxxxxxxxx
• Subject: [noaaport] Question about lifted index product
• From: Gary Lucas <gwlucas@xxxxxxxxxxxxx>
• Date: Tue, 26 Sep 2017 13:50:49 -0400

I'm looking at some of the new GOES-16 derived products being distributed via 
NOAAport and I have a question.   Looking at the ABI L2+ Derived Stability 
Indices: Lifted Index products, I am seeing the temperatures given with 
units="K"  (Kelvin), but some of the data values are in the negative  range.   
 
Because lifted index is given as a temperature difference, I believe that the 
units field of the data is being incorrectly populated and should probably be 
"C".   Is anyone else seeing this?  
 
Is there somebody I can contact about this issue?
 
Gary
 
Here's the dump from the raw data. 
 
 
target0.sectorizedCMI = (ucar.nc2.Variable) short LI(y=100, x=100);
  :_FillValue = -1S; // short
  :long_name = "ABI L2+ Derived Stability Indices: Lifted Index";
  :standard_name = 
"temperature_difference_between_ambient_air_and_air_lifted_adiabatically_from_the_surface";
  :_Unsigned = "true";
  :valid_range = 0S, -6S; // short
  :scale_factor = 7.6301E-4f; // float
  :add_offset = -10.0f; // float
  :units = "K";
  :resolution = "y: 0.000280 rad x: 0.000280 rad";
  :coordinates = "latitude retrieval_local_zenith_angle 
quantitative_local_zenith_angle solar_zenith_angle t y x final_air_pressure";
  :grid_mapping = "goes_imager_projection";
  :cell_methods = "latitude: point (good quality pixel produced) 
retrieval_local_zenith_angle: point (good or degraded quality pixel produced) 
quantitative_local_zenith_angle: point (good quality pixel produced) 
solar_zenith_angle: point (good quality pixel produced) t: point area: point";
  :ancillary_variables = "DQF_Overall DQF_Retrieval DQF_SkinTemp";
  :_ChunkSizes = 100, 100; // int
 
Gary W. Lucas, Senior Software Engineer
Sonalysts, Inc.
215 Parkway North
Waterford, CT 06385
(860) 326-3682
41-22-12.35 N / 72-10-07.54 W  (USNG/MGRS:  18T YL 36787 83711)

• Follow-Ups:
  • Re: [noaaport] Question about lifted index product
    • From: Mike Zuranski