Place Name	Lat	Long	Time	SQM-L/variance	Comments
Groton Center	42.605	71.562	10:31	20.18+-.02	Athletic field off Rt. 40
Power Line	42.595	71.542	10:39	20.35+-.10	Crossing Rt. 225
Rts. 225 & 27	42.538	71.400	11:00	20.11+-.04	0.8 miles W of intersection, some trees
Carlisle	42.530	71.355	11:08	20.00+-.10	Field 3 miles W of Sudbury River
Boat Ramp	42.509	71.313	11:16	19.86+-.04	Bedford side of Sudbury River
Bedford Ctr.	42.492	71.280	11:25	19.20+-.02	Church lawn, many trees, some lights
Hartwell Ave.	42.475	71.252	11:33	19.17+-.03	Parking lot with a few lights
Lexington Ctr.	42.453	71.232	11:39	19.11+-.02	Opposite Fire House, some lights
Winter&Concord	42.403	71.197	11:50	19.15+-.05	Field, some trees
Belmont Ctr.	42.395	71.175	11:55	18.85+-.05	Church parking lot, some lights
Danehy Park	42.388	71.138	12:04	18.26+-.02	Few lights, no trees
Camb. Common	42.377	71.122	12:18	18.10+-.05	Some lights, some trees