On 01/27/2016 I found a massive error in assignReanalysisTDataToMonitor.R I used the match() function incorrectly. This instance has been fixed, though it will likely be replaced by a for loop so that I do not ever have to worry about it again.

In every other script relevant to analysis, double check the use of the match() function. If used incorrectly stations metadata could be wrong, matching ozone and PM time series could be wrong. Worth double checking every use based on the error I found.

Fill triangles and leave non-significant circles open. right now its the non significant locations that jump.

It has come to my attention (unfortunately well past when it should have come to my attention) that I should have considered POC much more carefully in my aggregation of the AQS monitoring data. I am pretty sure I did not make use of the PM data nearly as effectively as possible because I did not consider every POC (instrument) at each location. I would consider myself lucky if there was not some semi-significant error associated with my analysis because of this oversight. I am going to fix the problem and update the progress here.

Now, my PM and Ozone (even CO) station IDs will look like SSCCCNNNN-Q, where everything but the Q (POC number) will be used to identify co-location and including the Q is the level where time series data will be considered for each instrument.

Documentation here: http://aqsdr1.epa.gov/aqsweb/aqstmp/airdata/FileFormats.html

1.1. Monitors
For the purposes of AQS, a monitor does not refer to a specific piece of equipment. Instead, it reflects that a given pollutant (or other parameter) is being measured at a given site.

Identified by:
The site (state + county + site number) where the monitor is located AND

The pollutant code AND

POC – Parameter Occurrence Code. Used to uniquely identify a monitor if there is more than one device measuring the same pollutant at the same site.

For example monitor IDs are usually written in the following way:

SS-CCC-NNNN-PPPPP-Q

where SS is the State FIPS code, CCC is the County FIPS code, and NNNN is the Site Number within the county (leading zeroes are always included for these fields), PPPPP is the AQS 5-digit parameter code, and Q is the POC. For example:

01-089-0014-44201-2

is Alabama, Madison County, Site Number 14, ozone monitor, POC 2.

1.2. Pollutant Standards