metadata: include remaining panel items in output
begin implementing Normalized NDVI
normalized NDVI: place Excel headers
normalize NDVI: initialize min & max by row == 2
normalized NDVI, Excel: use spreadsheet functions instead of values
normalized NDVI, Excel: adjust SAS values
metadata: get source DB path
normalized NDVI, Excel: if no Summaries, normalize SAS values directly
normalized NDVI, Excel: handle condition of no valid summary for a day
Excel output, use formulas throughout Summary sheet rather than copying values
Excel summaries; show days that have only 1 valid reading, but mark not to use
use Excel copy/paste to assure correct values in SAS output