Sky Quality Meter Readings taken within the Hopewell Big Woods using UniHedron Sky Quality Meters

Click here for Hopewell Big Woods Map (PDF)

All readings taken at zenith on clear moonless nights with negligible clouds. Small cloud cover near horizon is considered negligible.

Meters
Meter 1  - lb   Lou Behrman's meter
Meter 2  - ss  (Serial # - 0545, half-angle 40 degrees HWHM)
Meter 3  - bj   (Serial # - 3021, half-angle 40 degrees)
Meter 4  - fd   (Serial # - 6115, SQM-L half-angle 10 degrees HWHM)
Meter 5  - bg (Serial # - 2248, SQM-L half-angle 10 degrees)
Meter 6  - js   (Dark Sky Meter Version 1.4 on iPhone 4S, accepting calibration defaults)
Meter 7  - bh, tg  (Serial # - 6787, half-angle 40 degrees)
Meter 8  - al (Serial # - 5777, SQM-L half-angle 10 degrees)

Observers
LB - Lou Behrman
FD - Fred De Lucia
CF - Chris Fessett
BJ - Barry Johnson
JR - Jan Romer
SS - Stan Stubbe
BG - Barb Geigle
JS - Jon Schuchardt
BH - Becky Hughes
TG - Tom Gazzillo
AL - Al Lamperti

Locations

Code	Description
FCSP	French Creek State Park behind Park Office near playground
SGL43	Rifle range at State Gamelands 43 - GPS - N40 Deg. 10.504 - W075 Deg. 47.819 (Alt. 865')
HF	Hopewell Furnace National Historic Site
HNF	Hopewell Non-Ferrous Foundry, 2261 E. Main St., Douglassville 19518
GTNFTR	Geigertown, PA - Firetower Rd. - Half-way between Cold Run Rd. and Kratz Rd. - N 40 Deg. 12.106' - W 075 Deg. 49.768 (Alt. 483 ft.)
RCR	Red Corner Rd. at Blackwood golf course, between Hallman Rd. and Sycamore Rd., Union Twp. - N 40 Deg. 14.580' - W 075 Deg. 44.743 (Alt. 221 ft.)
HOFU	490 Hopewell Rd., Elverson, PA 19520
CNP	Crow's Nest Preserve
GL	Green Lane Park, Red Trail Parking Area
PBD	112 Pebble Beach Drive,Royersford, PA 19468

Sky Quality Meter Readings Log - Hopewell Big Woods

Date (mm/dd/yy)	Local Time	Location	Observer	MPSAS	Meter
07/03/10	22:30	FCSP	LB	20.21	1
07/03/10	23:00	FCSP	LB	20.21	1
09/08/10	22:25	FCSP	SS	20.12	2
10/01/10	00:30	FCSP	SS	20.34	2
10/02/10	00:30	FCSP	LB	20.34	1
03/02/11	22:30	FCSP	SS	20.22	2
06/02/11	22:00	FCSP	JR	19.78	3
06/25/11	23:45	FCSP	LB	20.18	1
07/02/11	22:00	FCSP	LB	20.18	1
09/26/11	20:48	FCSP	CF	19.81	3
02/20/12	20:15	FCSP	CF	19.89	3
09/12/12	20:45	GTNFTR	CF	19.83	3
09/05/12	22:00	HNF	BG	19.57	5
09/21/12	00:30	HNF	CF	19.75	3
11/18/11	19:30	HF	JR	19.95	4
11/18/11	19:30	HF	CF	19.73	3
09/21/12	00:52	RCR	CF	19.9	3
05/29/10	22:00	SGL43	LB	20.40	1
11/10/10	20:45	SGL43	BJ	19.88	3
08/18/12	22:30	SGL43	CF	20.21	3
08/18/12	22:45	SGL43	CF	20.25	3
08/18/12	23:00	SGL43	CF	20.25	3
08/18/12	23:30	SGL43	CF	20.34	3
08/19/12	00:35	SGL43	CF	20.29	3
07/30/13	23:07	SGL43	JS	20.23	2
08/04/13	23:10	SGL43	JS	20.17	2
09/06/13	22:30	SGL43	CF	20.40	3
09/06/13	23:30	SGL43	JS	20.13	3
09/06/13	23:30	SGL43	JS	20.40	6
05/26/14	01:30	SGL43	BJ	20.15	2
06/18/14	23:30	HOFU	BH	19.70	7
06/21/14	22:35	HOFU	BH	19.55	7
06/21/14	23:00	FCSP	FD	20.26	2
06/22/14	01:05	SGL43	BJ	20.14	4
06/27/14	23:30	HOFU	BH	20.10	7
07/01/14	23:30	HOFU	BH	19.70	7
08/16/14	22:55	HF	FD	20.30	4
08/24/14	22:00	SGL43	TG	20.28	7
08/24/14	22:30	SGL43	FD	20.34	4
08/24/14	23:52	SGL43	TG	20.32	7
08/25/14	00:00	SGL43	FD	20.38	4
08/25/14	01:15	SGL43	TG	20.35	7
08/27/14	23:00	SGL43	TG	20.34	7
08/28/14	00:02	SGL43	TG	20.41	7
08/28/14	01:46	SGL43	TG	20.39	7
09/18/14	20:45	CNP	TG	20.11	7
09/18/14	21:40	CNP	TG	20.24	7
09/18/14	22:05	CNP	TG	20.27	7
09/27/14	22:35	SGL43	TG	20.19	7
09/27/14	23:55	SGL43	TG	20.28	7
09/28/14	01:25	SGL43	TG	20.37	7
11/21/14	20:45	SGL43	TG	20.04	7
11/21/14	21:40	SGL43	TG	19.59	7
11/21/14	23:15	SGL43	TG	20.11	7
04/12/15	21:44	CNP	TG	19.28	7
04/12/15	21:58	CNP	TG	19.49	7
04/12/15	22:42	CNP	TG	19.51	7
05/19/15	22:14	SGL43	TG	20.24	7
05/19/15	23:35	SGL43	TG	20.30	7
05/20/15	00:37	SGL43	TG	20.39	7
05/23/15	01:00	SGL43	TG	20.33	7
05/23/15	01:15	SGL43	TG	20.28	7
07/11/15	23:30	FCSP	FD	20.44	4
07/16/15	23:50	SGL43	TG	20.22	7
07/17/15	00:45	SGL43	TG	20.20	7
08/14/15	00:10	SGL43	TG	20.30	7
08/14/15	23:55	SGL43	TG	20.20	7
08/15/15	01:05	SGL43	TG	20.22	7
08/17/15	00:05	SGL43	TG	20.16	7
09/05/15	21:40	SGL43	TG	20.23	7
09/05/15	20:50	SGL43	TG	20.25	7
09/05/15	23:30	SGL43	TG	20.34	7
09/06/15	00:35	SGL43	TG	20.42	7
09/06/15	01:15	SGL43	TG	20.49	7
12/04/15	20:50	SGL43	TG	19.96	7
12/04/15	21:45	SGL43	TG	20.01	7
12/04/15	22:50	SGL43	TG	20.08	7
01/03/16	00:30	SGL43	FD	20.32	4
06/29/16	23:50	SGL43	TG	20.37	7
06/30/16	00:30	SGL43	TG	20.39	7
07/11/16	01:20	SGL43	TG	20.26	7
07/11/16	02:05	SGL43	TG	20.20	7
07/11/16	02:55	SGL43	TG	20.23	7
11/04/16	21:05	SGL43	TG	19.96	7
11/04/16	21:55	SGL43	TG	20.04	7
11/04/16	22:50	SGL43	TG	20.10	7
02/19/17	22:05	SGL43	BJ	20.17	3
06/25/17	23:15	SGL43	TG	20.29	7
06/25/17	23:55	SGL43	TG	20.12	7
09/23/17	21:20	SGL43	TG	20.08	7
09/23/17	22:05	SGL43	TG	20.09	7
09/23/17	23:10	SGL43	TG	20.27	7
09/24/17	00:05	SGL43	TG	20.32	7
09/24/17	00:55	SGL43	TG	20.38	7
09/24/17	21:30	SGL43	TG	20.24	7
09/24/17	22:30	SGL43	TG	20.27	7
09/24/17	23:25	SGL43	TG	20.32	7
09/25/17	00:35	SGL43	TG	20.41	7
10/16/17	20:05	SGL43	TG	19.98	7
10/16/17	21:10	SGL43	TG	20.03	7
10/16/17	22:30	SGL43	TG	20.13	7
10/20/17	20:35	SGL43	TG	19.88	7
10/20/17	21:40	SGL43	TG	19.96	7
10/20/17	22:45	SGL43	TG	20.09	7
10/21/17	00:05	SGL43	TG	20.21	7
10/21/17	01:35	SGL43	TG	20.22	7
07/07/18	22:59	SGL43	TG	20.18	7
07/08/18	00:20	SGL43	TG	20.29	7
07/08/18	01:16	SGL43	TG	20.33	7
07/08/18	23:23	SGL43	TG	20.33	7
07/09/18	00:51	SGL43	TG	20.36	7
07/09/18	02:19	SGL43	TG	20.39	7
07/09/18	01:20	SGL43	TG	20.34	7
07/09/18	02:20	SGL43	TG	20.35	7
08/04/18	23:10	SGL43	TG	20.23	7
09/16/18	00:17	SGL43	TG	20.52	7
09/16/18	00:56	SGL43	TG	20.55	7
11/11/18	20:20	SGL43	TG	20.06	7
11/11/18	21:09	SGL43	TG	20.09	7
11/11/18	22:03	SGL43	TG	20.08	7
06/30/19	22:45	SGL43	TG	20.26	7
06/30/19	23:45	SGL43	TG	20.30	7
07/01/19	00:40	SGL43	TG	20.29	7
07/01/19	01:54	SGL43	TG	20.35	7
09/27/19	23:02	SGL43	TG	20.12	7
09/28/19	00:13	SGL43	TG	20.26	7
09/28/19	01:31	SGL43	TG	20.28	7
10/23/19	20:00	SGL43	TG	19.84	7
10/23/19	20:48	SGL43	TG	19.97	7
10/23/19	21:38	SGL43	TG	19.97	7
10/23/19	23:18	SGL43	TG	20.08	7
10/24/19	01:40	SGL43	TG	20.16	7
05/13/21	22:15	SGL43	TG	20.05	7
05/13/21	23:39	SGL43	TG	20.18	7
05/14/21	00:15	SGL43	TG	20.18	7
06/05/21	22:08	SGL43	TG	20.03	7
06/05/21	23:03	SGL43	TG	20.16	7
06/06/21	00:10	SGL43	TG	20.24	7
06/06/21	01:10	SGL43	TG	20.27	7
06/06/21	01:40	SGL43	TG	20.27	7
09/06/21	21:05	SGL43	TG	20.11	7
09/06/21	21:48	SGL43	TG	20.10	7
09/06/21	22:42	SGL43	TG	20.15	7
09/06/21	23:30	SGL43	TG	20.16	7
09/07/21	00:07	SGL43	TG	20.15	7
08/03/22	22:23	FCSP	TG	19.88	7
08/03/22	22:52	FCSP	TG	20.05	7
08/03/22	23:54	FCSP	TG	20.16	7
08/04/22	00:43	FCSP	TG	20.20	7
08/04/22	01:12	FCSP	TG	20.21	7
08/20/22	21:30	HF	TG	19.87	7
08/20/22	22:02	HF	TG	19.96	7
08/20/22	22:53	HF	TG	19.91	7
08/20/22	23:14	HF	TG	19.96	7
09/01/22	21:41	FCSP	TG	19:92	7
09/01/22	22:37	FCSP	TG	20.05	7
09/01/22	23:24	FCSP	TG	20.10	7
09/02/22	00:16	FCSP	TG	20.13	7
09/02/22	01:35	FCSP	TG	20.16	7
10/27/22	19:49	FCSP	TG	19.77	7
10/27/22	20:43	FCSP	TG	19.89	7
10/27/22	21:44	FCSP	TG	19.92	7
10/28/22	00:22	FCSP	TG	20.03	7
10/29/22	20:10	FCSP	TG	19.83	7
10/29/22	21:35	FCSP	TG	19.90	7
10/29/22	22:50	FCSP	TG	20.02	7
06/14/23	23:00	FCSP	TG	19.75	7
06/14/23	23:57	FCSP	TG	19.91	7
08/11/23	21:59	FCSP	TG	19.98	7
08/11/23	22:48	FCSP	TG	20.19	7
08/12/23	00:42	FCSP	TG	20.28	7
08/12/23	01:40	FCSP	TG	20.00	7
10/18/23	20:25	FCSP	TG	19.97	7
10/18/23	21:44	FCSP	TG	20.00	7
10/18/23	22:42	FCSP	TG	20.05	7
10/18/23	23:52	FCSP	TG	20.18	7
05/30/24	22:56	FCSP	TG	19.93	7
05/31/24	00:12	FCSP	TG	20.00	7
05/31/24	01:09	FCSP	TG	20.01	7
07/01/24	22:43	FCSP	TG	19.95	7
07/01/24	23:20	FCSP	TG	19.95	7
07/02/24	00:10	FCSP	TG	20.06	7
07/02/24	00:46	FCSP	TG	20.08	7
07/02/24	01:14	FCSP	TG	20.09	7
07/27/24	22:29	FCSP	TG	19.54	7
07/27/24	23:17	FCSP	TG	19.64	7
07/27/24	23:58	FCSP	TG	19.68	7
09/03/24	21:12	PBD	AL	19.50	8
09/04/24	21:20	PBD	AL	19.20	8
09/02/24	21:36	FCSP	TG	19.88	7
09/02/24	22:31	FCSP	TG	19.90	7
09/02/24	23:40	FCSP	TG	19.96	7
09/03/24	00:30	FCSP	TG	20.00	7
10/05/24	20:18	FCSP	TG	19.82	7
10/05/24	21:11	FCSP	TG	19.82	7
10/05/24	22:45	FCSP	TG	19.86	7
10/05/24	23:47	FCSP	TG	19.97	7
10/05/24	21:30	GL	AL	19.77	8
10/09/24	20:30	FCSP	TG	19.63	7
10/09/24	21:09	FCSP	TG	19.69	7
10/09/24	22:30	FCSP	TG	19.88	7
10/09/24	23:11	FCSP	TG	19.96	7
10/24/24	20:00	PBD	AL	19.36	8
10/24/24	19:56	FCSP	TG	19.56	7
10/24/24	20:36	FCSP	TG	19.67	7
10/24/24	21:48	FCSP	TG	19.82	7
10/24/24	22:19	FCSP	TG	19.85	7
11/01/24	19:36	FCSP	TG	19.69	7
11/01/24	20:32	FCSP	TG	19.74	7
11/01/24	21:12	FCSP	TG	19.75	7
11/07/24	18:53	FCSP	TG	19.45	7
11/07/24	20:09	FCSP	TG	19.55	7
11/07/24	21:18	FCSP	TG	19.66	7
11/07/24	22:59	FCSP	TG	19.86	7