Thanks, Alison! I haven't read through all of these yet, but based on
your email and
reading the ones I'm especially interested in, it looks great. I do have
a quick question,
though.
I see that platform_id and platform_name are 'under discussion', and
reference this
thread as the 'CF mailing list link'. Are they just on the the standard
names editor
list because the definitions will have the description of platform
updated (and moved
to the end), or are these actually changing in some other way?
Also, I looked at the standard name table and found these:
/platform_id//
//alias: station_wmo_id//
//Standard names for "platform" describe the motion and orientation of
the vehicle from which
observations are made. Platforms include, but are not limited to,
satellites, aeroplanes, ships,
instruments and buoys. A variable with the standard name of platform_id
contains strings
which help to identify the platform from which an observation was made.
For example, this
may be a WMO station identification number. //
////
//platform_name//
//alias: station_description//
//Standard names for "platform" describe the motion and orientation of
the vehicle from which
observations are made. Platforms include, but are not limited to,
satellites, aeroplanes, ships,
instruments and buoys. A variable with the standard name of
platform_name contains strings
which help to identify the platform from which an observation was made.
For example, this
may be a geographical place name such as "South Pole" or the name of a
meteorological
observing station./
I'm curious why they have aliases, especially since those aliases are
not in the standard name
table. Will those be removed when these definitions are updated? Also,
has there been any
discussion about updating these (or the guidance for them) in any way,
or are they purposely
left vague?
I don't want to take this thread off into another direction, I'm just
curious about these terms.
Thanks again -
Nan
On 10/3/18 1:10 PM, Alison Pamment - UKRI STFC wrote:
Dear Jim, Roy, Nan, Jonathan, et al.,
I have drawn together what I hope is the final list for the platform names.
We seem to be agreed on the need to have triplets of names to cope with
opposite sign conventions and the case where the sign convention is unknown.
I've followed Roy's comment
http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2018/020540.html regarding
cross-referencing in the definitions, i.e. adding the statement to only choose
the unsigned names if the convention is truly unknown. I plan to create aliases
for some of the existing names as follows:
platform_yaw_angle -> platform_yaw
platform_pictch_angle -> platform_pitch
platform_roll_angle > platform_roll
to make them consistent with the new names. In addition to Jim's 12th September
proposals (http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2018/020513.html),
new names for platform_sway, platform_sway_rate, platform_surge and
platform_surge_rate are needed to provide complete triplets of names for all
the quantities.
The definitions of the new quantities are all based on Jim's text, with the
'platform' description moved to the end. 'Instrument' has been added to the
list of platforms as I think this was requested by Nan earlier in the
discussion. (I think we can regard an 'instrument' as a way to mount one or
more 'sensors'). The definitions of all existing platform names will be updated
for consistency.
On a grammatical point, I noticed that the definitions of yaw/pitch/roll/surge rate in Jim's message all said "Yaw/pitch/roll/surge rate *might
not* include changes to the "at rest" position of the platform ..." whereas the definitions of sway/heave rate said "Sway/heave
rate *may not* include changes to the "at rest" position of the platform ...". I have changed all the definitions to say "might
not" instead of "may not" as I think the latter could sound like we are prohibiting the inclusion of changes to the "at
rest" position, which I don't think is the intention. Please correct me if this is wrong!
I have added all the names into the standard names editor:
http://cfeditor.ceda.ac.uk/proposals/1?status=active&namefilter=platform&proposerfilter=&descfilter=&unitfilter=&yearfilter=&commentfilter=&filter+and+display=Filter.
To save copying and pasting all the text into this message, please use the link to check through the full
list. N.B. You can refine the filters to view smaller subsets of names together, e.g., 'platform_sway'. If
no objections or suggestions for further changes are received, the names will be accepted in their current
form and published on 15th October.
Best wishes,
Alison
------
Alison Pamment Tel: +44 1235 778065
NCAS/Centre for Environmental Data Archival Email: alison.pamm...@stfc.ac.uk
STFC Rutherford Appleton Laboratory
R25, 2.22
Harwell Oxford, Didcot, OX11 0QX, U.K.
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