Test case for possible excessive cloud coverage

[cpaniaguam]

@cpaniaguam the error is pretty ubiquitous so it's not too hard to find an example! This is a minimal site_specification CSV, it's the first entry in the list of Baffin Bay cases I ran earlier.

`location,center_lat,center_lon,top_left_lat,top_left_lon,lower_right_lat,lower_right_lon,left_x,right_x,lower_y,top_y,startdate,enddate

baffin_bay-100km_by_100km-20040725-20040726,69.90135406,-65.28920054,70.15782,-66.98525,69.62829,-63.63812,-812499.99995,-712499.99995,-2112499.99961,-2012499.99961,2004-07-25,2004-07-26
`

Originally posted by @danielmwatkins in #114 (comment)

[tdivoll]

@cpaniaguam, In the param set listed here, do we need at least 3 dates for floe pairing? I thought I remembered something about that.