Central California & Western Nevada at Night
Skykeepers
 skykeepers.org founded September 1, 1999

Using DMSP data coupled with active mouse over technique you can identify may cities and places on this map.
Place mouse pointer on a location and reveal the city or place.

Information and explanation on this map shown below.

DMSP Valley
Dunnigan/I-5 junction I-505 Unknown Light Source 3 Miles South of Eilliams at 250,104 Interstate 80 / Madison Avenue Cal Expo/Race Track Down Town Sacramento, Wells Fargo Building, State Capital Building Rancho Murieta Kiefer Land Fill Rancho Seco Power Plant San Andreas Commanche Lake/Burson/Valley Springs Arnold/Avery/Hathaway Pines Strawberry/Pinecrest Sacramento International Airpor Port of Oakland Fort Bragg Laytonville Bodega Bay Willits Ukiah Monteray Santa Cruze Carmel Valley Watsonville Salinas Gonzales Campria Soledad Soledad Correctional Training Facility Greenfield Winters Williams Unknown Light Source at 246,214 King City Willows Dixon Unknown Light Source at 249,328 Unknown Light Source at at 580-205 Split Unknown Light Source at 252,224 Davis Orland Colusa Unknown Light Source at 256,364 Atescadero Woodland Tracy Corning Paso Robles Paterson Yuba City Lodi Manteca Newman Gustine Chico Stockton Galt Gridley Live Oak Unknown Light Source at 280,276 Escalon Unknown Light Source at 286064 Modesto Modesto Oroville Beal Air Force Base Ceres Turlock Unknown Light Source at 292,286 Coalinga Choleme Paradise Oakdale Waterford Unknown Light Source at 298,358 Mule Creek Correctional Facility Ione Los Banos Unknown Light Source at 300,350 Avenal Atwater Unknown Light Source at 304,360 Cameron Park Merced Jackson Unknown Light Source at 310,354 Unknown Light Source at 310,376 Grass Valley Placerville Unknown Light Source at 314,372 Nevada City Unknown Light Source at 322,288 Unknown Light Source at 322,348 Unknown Light Source at 322,352 Unknown Light Source at 324,284 Madera Sonora Unknown Light Source at 326,360 Unknown Light Source at 330,340 Unknown Light Source at 330,350 Pollock Pines Unknown Light Source at 332,356 Quincy Unknown Light Source at 334,332 Unknown Light Source at 336,348 Unknown Light Source at 338,300 Unknown Light Source at 340,342 Corcoran Corcoran State Prison Unknown Light Source at 343039 Mariposa Fresno Unknown Light Source at 350,356 Unknown Light Source at 350,398 Unknown Light Source at 352,376 Unknown Light Source at 354,300 Tahoe Donner Unknown Light Source at 356,376 Unknown Light Source at 356,384 Portola Unknown Light Source at 358,346 Sierraville Squaw Valley Tulare Unknown Light Source at 360,380 Sanger Visalia Meeks Bay Truckee Tahoe City Unknown Light Source at 366,338 South Lake Tahoe Unknown Light Source at 370032 Unknown Light Source at 370,388 Loyalton Lindsay Kings Beach Lake Wood Proterville Incline Village Zepyr Cove Reno Carson City Herlong Boidy Unknown Light Source at 427150 Wadsworth/Feynley Woodfords Hawthorne China Lake or ULS Fallon Fallon Naval Air Station Unknown Light Source at 474158 Lovelock Unionville No Energy Waste Here
 
Location
 Return
to Map		 Detail
Map		 U.S.Census
Bureau Map
Dark-Sky
Search Map
Limiting
Magnitude
Observed
Value
Energy
Loss
 square miles
(kilometers)		 Light energy
Loss/Area		 Notes
Sacramento Area Return  GO Bureau Map Dark Sky Map   2.4810^3 14.9 GW 1196(1926)  7.72x10^-3 See Sacramento Area Map for more details.
Stockton Return GO Bureau Map Dark Sky Map
~4.8
 6.15x10^2 3.68 GW 309(499)  7.38x10^ -3  
Modesto Return GO Bureau Map Dark Sky Map
~4.5
 5.05x10^2 3.03 GW 277(447) 6.77x10^ -3  
Fresno Return GO Bureau Map Dark Sky Map 
~3.9
 1.11x10^2 6.66 GW 619(998) 6.67x10^ -3  
Bakersfield Return GO Bureau Map Dark Sky Map   6.78x1-^2 4.42 GW (1189) 3.72x10^ -3  Below this scan











Fort Bragg Return GO Bureau Map Dark Sky Map   NA NA NA NA  
Laytonville Return GO Bureau Map Dark Sky Map   NA NA NA NA  
Bodega Bay Return GO Bureau Map Dark Sky Map   NA NA NA NA  
Willits Return GO Bureau Map Dark Sky Map   NA NA NA NA  
Ukiah Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Monterey,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Santa Cruze,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Carmel Valley,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Watsonville,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Salinas,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Gonzales,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Campria,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Soledad,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Soledad CTF,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Greenfield,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Winters,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Williams,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
ULSxxxxx1 Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
King City,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Willows,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Dixon,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
ULSxxxxx2  Return  GO Bureau Map Dark Sky Map
NA NA NA NA At SR580-SR205 Split
Davis,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Orland,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Colusa,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Atescadero,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Woodland,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Tracy,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Corning,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Paso Robles,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Paterson,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Yuba City,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Galt,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Manteca,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Newman,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Gustine,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Chico,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Gridley,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Live Oak,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Escalon,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
ULS286064 Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Oroville,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Beal Air Force Base,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA 10 miles east of Marysville & Yuba City. 
The base, covers nearly 23,000 acres
Roseveille,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Ceres,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Turlock,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Coalinga,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Choleme,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Paradise,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Oakdale,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Waterford,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Ione,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Los Banos,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Avenal,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Atwater,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Cameron Park,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Merced,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Jackson,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Grass Valley,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Placerville,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Nevada City,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Madera,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Sonora,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Pollock Pines,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Quincy,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Corcoran,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Corcoran State Prison,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Mariposa,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Tahoe Donner,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Portola,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Sierraville,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Squaw Valley,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Tulare,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Sanger,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Visalia,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Meeks Bay,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Truckee,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Tahoe City,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
South Lake Tahoe,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Loyalton,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Lindsay,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Kings Beach,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Lake Wood,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Proterville,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Incline Village,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Zepyr Cove,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Reno,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Carson City,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Herlong,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Boidy,  Return  GO Bureau Map Dark Sky Map

NA NA NA NA  
Wadsworth & Fernley,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Woodfords,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Hawthorne,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
China Lake or ULS,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA Navel Air Station
Fallon,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Fallon Naval Air Station, Return  GO Bureau Map Dark Sky Map   NA NA NA NA  
Lovelock,  Return  GO Bureau Map Dark Sky Map
NA NA NA NA  
Unionville,  Return  GO Bureau Map Dark Sky Map   NA NA NA NA  

The image and energy evaluation on the page was obtained from
Dr. Syuzo ISOBE at the National Astronomical Observation, Japan.
The pioneering effort of Dr. ISOBE and his students is most appreciated.

Some Links relating to the DMSP Satellites and images:

    More images on Dr. ISOBE's web site  images of other portions of North America. (site is no longer active)

    International Dark-Sky Association - Images page

    Elvidge, C.D., Baugh, K.E., Kihn, E.A., Kroehl, H.W, Davis, E.R, 1997,
   Mapping City Lights With Nighttime Data from the DMSP Operational Linescan System.
   Photogrammetric  Engineering and Remote Sensing, v. 63, p. 727-734.

    National Oceanic and Atmospheric Administration (NOAA)  DMSP Satellite Program Description

    USAF Defense Meteorological Satellite Program Fact Sheet

    USAF Space and Missile System Center, DMSP Information Page

    USAF Space and Missile System Center, Processing of DMSP Imagery
    This may not be the exact same process used by NOAA

Glossary of Terms:

OLS: The Operational Linescan System (OLS) measures visible (0.4-1.1 micrometers) and infrared (10.25-12.6 micrometers) wavelengths
to provide day and night cloud cover imagery. The satellite measures data at a 0.56 km (0.34mi or 1,837ft) resolution, which is averaged on board, to produce global coverage at 2.7 km (1.6mi or 8,858ft) resolution. All of the 2.7 km resolution (smooth) data are downlinked to the ground sites while a  small amount of the 0.56 km resolution (fine) data is stored and downlinked. The OLS is the primary sensor on each DMSP satellite.

Observed Value:

Energy Loss:

Light Energy Loss/Area:

Limiting Magnitude:
 


05 OCT 2007
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