for some days, files from a mobile unit and the fixed unit were both included in 2015_Motus_Kingsburg
sort out from the following what the deployment dates for each SG should be:
select t1.*, t2.bootnum, min(t2.ts) as tsLo, max(t2.ts), avg(t3.lat), avg(t3.lon) as tsHi
from deployments as t1 left join files as t2 on t1.depID=t2.depID left join gps as t3 on
t1.depID=t3.depID group by t2.depID, t2.bootnum order by t2.depID, t2.bootnum;
for some days, files from a mobile unit and the fixed unit were both included in 2015_Motus_Kingsburg