drift correction- consider updating outputs and adding new field

[wetlandsDiane]

A few potential updates for the drift output:

1. data quality field. Could indicate the following:

   • not corrected for drift
   • drift more than x per day
   • drift more than y per day
   • etc.

2. Also, could be good to output for user either the average drift during the time period or the drift per some unit of time, since a lot of drift in a small period of time probably indicates more issues with day to day values than that same amount of drift over the course of more time.