Folks:
we have a product type (lightning detections) that has three data variables where there is a relationship that must be captured in the NetCDF data set.
The 3 data variables are (1) flash_energy, (2) group energy), and (3) event_energy.
A flash_energy is associated with one or more group_energy elements. A group_energy is associated with one or more event_energy elements.
To support this, have identified 2 new standard attributes, "association" and "associations", and added a concept of an "association variable".
float flash_energy (number_of_flashes);
:associations = ?flash_energy flash_group_association group_energy?;
float group_energy (number_of_groups);
:associations = ?flash_energy flash_group_association group_energy, group_energy group_event_association event_energy";
float event_energy (number_of_events);
:associations = ?group_energy group_event_association event_energy?;
long flash_group_association (number_of_groups);
:association = ?flash_energy group_energy?;
long group_event_association (number_of_events);
:association = ?group_energy event_energy?;
Flash, group, and event association attributes and variables notes
? There is one association variable to capture the associations between individual flashes and groups, and another association variable to capture the associations between individual groups and events.
? The group_energy data variable specifies two associations as it is a destination data variable for the flash to group association and a source data variable for the group to event association.
? The extent of the association variables? dimensions is the same as the association?s destination data variable.
*** Note that this convention only makes sense when the affected data variables have a single dimension (e.g. points).
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Received on Fri May 18 2012 - 07:23:22 BST
