Hello Jamie
I think I see where you are coming from, thank you for sharing your thoughts.
If the relationship between the different coordinates is known and explicitly
defined, then an encoding not using scalar coordinates, as you have defined, is
a plausible approach.
I have not seen the
Hello CF
A few standard names:
sound_intensity_level_*
sound_pressure_level_*
have a stated canonical units of dB. I think valid units in CF are defined by
udunits2.
My install of udunits (udunits2-2.1.24) does not recognise dB as a valid units
string.
Is this an issue for the CF standard
Hi Seth,
Finally getting back to you e-mail after a long weekend...
You raise a good point about the two levels used for many of the
stability indices. You're right, it would be nice to have this
information in the definition for the these data products in case data
users/modelers need it.
You nailed it, Mike. H.5 is the intended illustration where A9.2.3.2
is referenced. Thanks for pointing out the error.
- Steve
On 5/28/2013 9:35 PM, Mike McCann wrote:
Hi,
I'm working on understanding how to properly express nominal and
precise locations for timeSeriesProfile data
Mark,
Logarithmic units need a reference level in order to support numerical
conversions; dB doesn't have one. A decibel unit with a one milliwatt
reference level would be 0.1 lg(re 1 mW).
Regards,
Steven Emmerson
Software Developer
Unidata Program Center
University Corporation for Atmospheric
Dear Steve and Mark
In view of the need for a reference level, it's part of the definition of the
standard names that have units in decibels.
Cheers
Jonathan
- Forwarded message from Steven Emmerson emmer...@ucar.edu -
Date: Wed, 29 May 2013 09:25:59 -0600
From: Steven Emmerson
Jonathan,
I wanted to make a minor addition to the definition of the total totals
index to include coordinate variables for the 850 and 500 hPa pressure
levels. It seems that this information might be useful to have in a
netCDF file, but not be specifically required. Please let me know if
Dear Jonathan
It would be all right to specify coordinate variables (size one or scalar)
for the two levels, but they would have to be distinguishable. That means
they'd have to have different standard names, I suppose - what would they be?
It seems to me this would then tend towards the
Dear CF board:
I would like to propose the following standard name:
atmosphere_stability_showalter_index
with the associated definition:
The atmosphere_stability_showalter_index is an index used to determine
convective and thunderstorm potential and is often referred to as simply
the
Hi Jonathan,
I suggested two such standard_names in an email on Friday,
because I need them for various CAPE/CIN/etc standard_names:
air_pressure_of_lifted_parcel_at_start
air_pressure_of_lifted_parcel_at_finish
These would have the following definitions:
Various stability and convective
Hi Jonathan,
Looks good to me! I'm happy that it's useful for your case as well
as the ones I'm proposing.
Philip has suggested we switch from _at_origin to _at_start for the
standard_names, arguing that it's less ambiguous.
Any thoughts on that?
Cheers,
--Seth
On Wed, 29 May 2013
Dear Seth,
Yes, I remember your new standard names. In fact, I just updated the
definition of the lifted index to include these two names. However, the
total totals index (and others, such as the showalter index) are
somewhat different beasts than the lifted index in that they really do
not
Hi all,
We ran into a glitch after converting one of our buoys to the new CF-1.6
discrete sampling geometries (DSG) format, and I'm looking for advice. This
dataset uses the single time series format, like the one provided in the
template of the CF document in Example H.4:
Jonathan W--
Whoops, two Jonathans in the thread -- I should have included a last name.
Sorry for the confusion!
My reply was to Jonathan Gregory's question about indicating the start/end
pressures.
If the total totals and showalter indices are always calculated for the same
pressure heights,
Hi Seth,
Great, thanks again for the suggestions! Also, see another e-mail
thread for the total totals index that I just responded to. I tried to
give my thought process on including (or not including) the _at_start
and _at_finish standard names for the various stability indices that I
Hi John:
1) The coordinates attribute is not new to DSG, it has been around since
the beginning of CF. This defines the auxiliary coordinate variables,
that is, coordinate variables that do not follow lat(lat) template. I
think it would be good if Grads et al could be upgraded to use them.
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