Unique elements for the UVMRP/par data entity.

Photosynthetically Active Radiation, 400-700nm, micromoles/m2/sec. 

See the UVMRP_README for headers common to all entities.

Column headers:
•	PAR = Photosynthetically Active Radiation, micromoles/m2/sec.

QC codes (0 OR semi-colon delimited list):
•	nbp: no bias available for PAR; data are not bias corrected
•	pg: electronic noise in the signal due to aging of the components or interference from adjacent instrumentation