THREDDS server aggregation capabilities for forecast output
- To: THREDDS <address@hidden>
- Subject: THREDDS server aggregation capabilities for forecast output
- From: Steve Hankin <address@hidden>
- Date: Wed, 05 Oct 2005 16:03:23 -0700
Hi John (Caron),
Here's a "blue sky" request for you: a capability of the THREDDS server
that is particularly relevant to Unidata's community of atmospheric
scientists. (Also a natural complement to IDD.)
Operational forecasting shops produce an on-going sequence of forecast
time series. If netCDF is used for output then typically each file
starts at some Z0 (initial state estimate) and proceeds by some time
increment out to an arbitrary end point for the forecast. (Sometimes
there are initial hindcast/spin-up time steps included, too).
There are many instances where we'd like to aggregate this sequence of
files to produce a single, clean time series. Most commonly this would
require taking the Z0 time step of all of the files except the last (the
current forecast); and appending all of the time steps from the last.
There are variations on this theme. For example the skill of a forecast
can easily be viewed by looking at a time series that shows the very
same forecasted date/time, as estimated over time: 3 days ago; 2 days
ago, yesterday, today -- the same time axis as the preceding example,
but a different aggregation.
Are aggregations of this sort on your list of future capabilities for
the THREDDS server?
Steve Hankin, NOAA/PMEL -- address@hidden
7600 Sand Point Way NE, Seattle, WA 98115-6349
ph. (206) 526-6080, FAX (206) 526-6744
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