heat radiating upward from roof http://people.csail.mit.edu/jaffer/SimRoof/Tropics/PerfectLambertian

SimRoof: Perfect Lambertian in the Tropics


Available Lambertian Radiative Cooling Versus Time of Day

Plot of Net Infrared Radiative Transfer availabilities versus Time over typical meteorological year Weather Forecast Office at Tiyan, Guam
../sr.scm 912120TYA.CSV nirt-3-5-5-13-32.scm perfect.scm nirt zero-in-range avail hr png
912120TYA.CSV: GUAM WFO, GU, 13.483N 144.800E, elevation=77.m
     Description:                     Data range (res):    Source flags:
  hr Time                             1 to 24 h           
 ghi Global Horizontal Irradiance     0 to 1019 W.h/m^2    1:100%
 dni Direct Normal Irradiance         0 to 940 W.h/m^2     1:100%
 dhi Diffuse Horizontal Irradiance    0 to 627 W.h/m^2     1:100%
 tsc Total Sky Cover                  0 to 100 % (10)      A:88% B:1% E:11%
 osc Opaque Sky Cover                 0 to 100 % (10)      A:80% B:1% E:19%
 dbt Dry Bulb Temperature          21.7 to 32.8 oC (5/9)   A:93% B:7%
 dpt Dew Point Temperature            0 to 26.7 oC (5/9)   A:93% B:3% E:4%
  ap Atmospheric Pressure         95800 to 103200 Pa (100) A:93% B:7%
  ws Wind Speed                       0 to 38.6 m/s (0.1)  A:93% B:3% E:4%
  ch Ceiling Height                   0 to 21238 m         A:51% B:2% E:2% -45%
  pw Precipitable Water              24 to 63 mm           E:100%
Ceiling-Unlimited Opaque Sky Coverage Hours: 1133.8 (13%)
Plot of Net Infrared Radiative Transfer availabilities versus Time over typical meteorological year Andersen Air Force Base, Guam
../sr.scm 912180TYA.CSV nirt-3-5-5-13-32.scm perfect.scm nirt zero-in-range avail hr png
912180TYA.CSV: ANDERSEN AFB, GU, 13.567N 144.917E, elevation=162.m
     Description:                     Data range (res):    Source flags:
  hr Time                             1 to 24 h           
 ghi Global Horizontal Irradiance     0 to 1023 W.h/m^2    1:100%
 dni Direct Normal Irradiance         0 to 950 W.h/m^2     1:100%
 dhi Diffuse Horizontal Irradiance    0 to 647 W.h/m^2     1:100%
 tsc Total Sky Cover                 20 to 100 % (10)      A:100% B:0% E:0%
 osc Opaque Sky Cover                 0 to 100 % (10)      B:0% E:100%
 dbt Dry Bulb Temperature          21.1 to 31.7 oC (5/9)   A:100% B:0% E:0%
 dpt Dew Point Temperature         14.4 to 27.2 oC (5/9)   A:100% B:0% E:0%
  ap Atmospheric Pressure         97600 to 99900 Pa (100)  A:99% B:1% E:0%
  ws Wind Speed                       0 to 23.1 m/s (0.1)  A:100% B:0% E:0%
  ch Ceiling Height                  90 to 17667 m         A:47% B:0% E:0% -53%
  pw Precipitable Water              25 to 65 mm           E:100%
Ceiling-Unlimited Opaque Sky Coverage Hours: 1738.9 (20%)
Plot of Net Infrared Radiative Transfer availabilities versus Time over typical meteorological year Mercedita, Puerto Rico
../sr.scm 785203TYA.CSV nirt-3-5-5-13-32.scm perfect.scm nirt zero-in-range avail hr png
785203TYA.CSV: MERCEDITA, PR, 18.000N -66.550E, elevation=8.m
     Description:                     Data range (res):    Source flags:
  hr Time                             1 to 24 h           
 ghi Global Horizontal Irradiance     0 to 1044 W.h/m^2    1:100%
 dni Direct Normal Irradiance         0 to 987 W.h/m^2     1:100%
 dhi Diffuse Horizontal Irradiance    0 to 607 W.h/m^2     1:100%
 tsc Total Sky Cover                  0 to 100 % (10)      A:71% B:16% E:13%
 osc Opaque Sky Cover                 0 to 100 % (10)      B:16% E:84%
 dbt Dry Bulb Temperature            15 to 35 oC (5/9)     A:71% B:16% E:13%
 dpt Dew Point Temperature           10 to 26.6 oC (5/9)   A:71% B:16% E:13%
  ap Atmospheric Pressure         97900 to 101700 Pa (100) A:0% E:100%
  ws Wind Speed                       0 to 27.7 m/s (0.1)  A:70% B:16% E:13%
  ch Ceiling Height                   0 to 21999 m         A:20% B:5% E:5% -70%
  pw Precipitable Water              23 to 56 mm           E:100%
Ceiling-Unlimited Opaque Sky Coverage Hours: 1125.2 (13%)
Plot of Net Infrared Radiative Transfer availabilities versus Time over typical meteorological year Eugenio Maria de Hostos Airport, Puerto Rico
../sr.scm 785145TYA.CSV nirt-3-5-5-13-32.scm perfect.scm nirt zero-in-range avail hr png
785145TYA.CSV: EUGENIO MARIA DE HO, PR, 18.250N -67.150E, elevation=9.m
     Description:                     Data range (res):    Source flags:
  hr Time                             1 to 24 h           
 ghi Global Horizontal Irradiance     0 to 1027 W.h/m^2    1:100%
 dni Direct Normal Irradiance         0 to 956 W.h/m^2     1:100%
 dhi Diffuse Horizontal Irradiance    0 to 642 W.h/m^2     1:100%
 tsc Total Sky Cover                  0 to 100 % (10)      A:50% B:33% E:17%
 osc Opaque Sky Cover                 0 to 100 % (10)      B:33% E:67%
 dbt Dry Bulb Temperature          13.9 to 36.1 oC (5/9)   A:50% B:33% E:17%
 dpt Dew Point Temperature         12.2 to 28.3 oC (5/9)   A:50% B:33% E:17%
  ap Atmospheric Pressure         101200 to 101200 Pa (1.01e+05) E:100%
  ws Wind Speed                       0 to 15.4 m/s (0.1)  A:50% B:33% E:17%
  ch Ceiling Height                   0 to 21999 m         A:19% B:21% E:7% -53%
  pw Precipitable Water              22 to 57 mm           E:100%
Ceiling-Unlimited Opaque Sky Coverage Hours: 649.4 (7%)
Plot of Net Infrared Radiative Transfer availabilities versus Time over typical meteorological year Charlotte Amalie, Virgin Islands
../sr.scm 785430TYA.CSV nirt-3-5-5-13-32.scm perfect.scm nirt zero-in-range avail hr png
785430TYA.CSV: CHARLOTTE AMALIE HARRY S TRUM, VI, 18.350N -64.967E, elevation=6.m
     Description:                     Data range (res):    Source flags:
  hr Time                             1 to 24 h           
 ghi Global Horizontal Irradiance     0 to 1034 W.h/m^2    1:100%
 dni Direct Normal Irradiance         0 to 966 W.h/m^2     1:100%
 dhi Diffuse Horizontal Irradiance    0 to 574 W.h/m^2     1:100%
 tsc Total Sky Cover                  0 to 100 % (10)      A:36% B:4% E:60%
 osc Opaque Sky Cover                 0 to 100 % (10)      A:40% B:4% E:55%
 dbt Dry Bulb Temperature            -8 to 36.6 oC (5/9)   A:78% B:3% E:19%
 dpt Dew Point Temperature        -12.7 to 29 oC (5/9)     A:76% B:4% E:20%
  ap Atmospheric Pressure         99000 to 103600 Pa (100) A:42% B:0% E:58%
  ws Wind Speed                       0 to 21.6 m/s (0.1)  A:78% B:3% E:20%
  ch Ceiling Height                   0 to 21999 m         A:18% B:1% E:6% -75%
  pw Precipitable Water              19 to 61 mm           E:100%
Ceiling-Unlimited Opaque Sky Coverage Hours: 1378.3 (16%)
Plot of Net Infrared Radiative Transfer availabilities versus Time over typical meteorological year San Juan International Airport, Puerto Rico
../sr.scm 785260TYA.CSV nirt-3-5-5-13-32.scm perfect.scm nirt zero-in-range avail hr png
785260TYA.CSV: SAN JUAN INTL ARPT, PR, 18.417N -66.000E, elevation=19.m
     Description:                     Data range (res):    Source flags:
  hr Time                             1 to 24 h           
 ghi Global Horizontal Irradiance     0 to 1041 W.h/m^2    1:100%
 dni Direct Normal Irradiance         0 to 950 W.h/m^2     1:100%
 dhi Diffuse Horizontal Irradiance    0 to 627 W.h/m^2     1:100%
 tsc Total Sky Cover                  0 to 100 % (10)      A:85% B:13% E:1%
 osc Opaque Sky Cover                 0 to 100 % (10)      A:63% B:13% E:24%
 dbt Dry Bulb Temperature          19.4 to 34.4 oC (5/9)   A:88% B:12%
 dpt Dew Point Temperature         11.7 to 28.8 oC (5/9)   A:88% B:12%
  ap Atmospheric Pressure         100300 to 102200 Pa (100) A:88% B:12%
  ws Wind Speed                       0 to 26.2 m/s (0.1)  A:88% B:12%
  ch Ceiling Height                  90 to 15367 m         A:33% B:1% -66%
  pw Precipitable Water              22 to 54 mm           E:100%
Ceiling-Unlimited Opaque Sky Coverage Hours: 1558.3 (18%)
Plot of Net Infrared Radiative Transfer availabilities versus Time over typical meteorological year Aquadilla/Borinquen, Puerto Rico
../sr.scm 785140TYA.CSV nirt-3-5-5-13-32.scm perfect.scm nirt zero-in-range avail hr png
785140TYA.CSV: AQUADILLA/BORINQUEN, PR, 18.500N -67.133E, elevation=72.m
     Description:                     Data range (res):    Source flags:
  hr Time                             1 to 24 h           
 ghi Global Horizontal Irradiance     0 to 1050 W.h/m^2    1:100%
 dni Direct Normal Irradiance         0 to 969 W.h/m^2     1:100%
 dhi Diffuse Horizontal Irradiance    0 to 639 W.h/m^2     1:100%
 tsc Total Sky Cover                  0 to 100 % (10)      A:80% B:20% E:0%
 osc Opaque Sky Cover                 0 to 100 % (10)      B:20% E:80%
 dbt Dry Bulb Temperature          17.2 to 32.8 oC (5/9)   A:79% B:20% E:0%
 dpt Dew Point Temperature         11.7 to 27.2 oC (5/9)   A:79% B:20% E:0%
  ap Atmospheric Pressure         96200 to 100400 Pa (200) A:0% B:0% E:100%
  ws Wind Speed                       0 to 12.9 m/s (0.1)  A:79% B:20% E:0%
  ch Ceiling Height                 240 to 21831 m         A:19% B:6% E:0% -75%
  pw Precipitable Water              22 to 57 mm           E:100%
Ceiling-Unlimited Opaque Sky Coverage Hours: 1311.7 (15%)
Plot of Net Infrared Radiative Transfer availabilities versus Time over typical meteorological year Hilo International Airport, Hawaii
../sr.scm 912850TYA.CSV nirt-3-5-5-13-32.scm perfect.scm nirt zero-in-range avail hr png
912850TYA.CSV: HILO INTERNATIONAL AP, HI, 19.717N -155.050E, elevation=9.m
     Description:                     Data range (res):    Source flags:
  hr Time                             1 to 24 h           
 ghi Global Horizontal Irradiance     0 to 1072 W.h/m^2    1:92% 2:8%
 dni Direct Normal Irradiance         0 to 982 W.h/m^2     1:92% 2:8%
 dhi Diffuse Horizontal Irradiance    0 to 567 W.h/m^2     1:92% 2:8%
 tsc Total Sky Cover                  0 to 100 % (10)      A:64% B:28% E:8%
 osc Opaque Sky Cover                 0 to 100 % (10)      A:72% B:28%
 dbt Dry Bulb Temperature          13.9 to 31.1 oC (5/9)   A:72% B:28%
 dpt Dew Point Temperature          8.3 to 24.4 oC (5/9)   A:72% B:28%
  ap Atmospheric Pressure         100600 to 102300 Pa (100) A:72% B:28%
  ws Wind Speed                       0 to 15.4 m/s (0.1)  A:72% B:28%
  ch Ceiling Height                 120 to 10360 m         A:52% B:17% -31%
  pw Precipitable Water              18 to 60 mm           E:100%
Ceiling-Unlimited Opaque Sky Coverage Hours: 899.8 (10%)
Plot of Net Infrared Radiative Transfer availabilities versus Time over typical meteorological year Lanai, Hawaii
../sr.scm 911905TYA.CSV nirt-3-5-5-13-32.scm perfect.scm nirt zero-in-range avail hr png
911905TYA.CSV: LANAI, HI, 20.783N -156.950E, elevation=409.m
     Description:                     Data range (res):    Source flags:
  hr Time                             1 to 24 h           
 ghi Global Horizontal Irradiance     0 to 1065 W.h/m^2    1:100%
 dni Direct Normal Irradiance         0 to 975 W.h/m^2     1:100%
 dhi Diffuse Horizontal Irradiance    0 to 669 W.h/m^2     1:100%
 tsc Total Sky Cover                  0 to 100 % (10)      A:25% B:31% E:44%
 osc Opaque Sky Cover                 0 to 100 % (10)      B:31% E:69%
 dbt Dry Bulb Temperature          -6.7 to 31.1 oC (5/9)   A:25% B:31% E:44%
 dpt Dew Point Temperature         -6.7 to 25.5 oC (5/9)   A:24% B:29% E:47%
  ap Atmospheric Pressure         96500 to 96500 Pa (9.65e+04) E:100%
  ws Wind Speed                       0 to 25.7 m/s (0.1)  A:25% B:31% E:44%
  ch Ceiling Height                   0 to 21999 m         A:9% B:16% E:25% -50%
  pw Precipitable Water              16 to 56 mm           E:100%
Ceiling-Unlimited Opaque Sky Coverage Hours: 934.6 (11%)
Plot of Net Infrared Radiative Transfer availabilities versus Time over typical meteorological year Kahului Airport, Hawaii
../sr.scm 911900TYA.CSV nirt-3-5-5-13-32.scm perfect.scm nirt zero-in-range avail hr png
911900TYA.CSV: KAHULUI AIRPORT, HI, 20.900N -156.433E, elevation=16.m
     Description:                     Data range (res):    Source flags:
  hr Time                             1 to 24 h           
 ghi Global Horizontal Irradiance     0 to 1038 W.h/m^2    1:100%
 dni Direct Normal Irradiance         0 to 1005 W.h/m^2    1:100%
 dhi Diffuse Horizontal Irradiance    0 to 516 W.h/m^2     1:100%
 tsc Total Sky Cover                  0 to 100 % (10)      A:63% B:37%
 osc Opaque Sky Cover                 0 to 100 % (10)      A:63% B:37%
 dbt Dry Bulb Temperature          12.8 to 32.2 oC (5/9)   A:64% B:36%
 dpt Dew Point Temperature          9.4 to 25 oC (5/9)     A:64% B:36%
  ap Atmospheric Pressure         100400 to 102000 Pa (100) A:64% B:36%
  ws Wind Speed                       0 to 14.9 m/s (0.1)  A:64% B:36%
  ch Ceiling Height                 150 to 21311 m         A:24% B:9% -68%
  pw Precipitable Water              19 to 48 mm           E:100%
Ceiling-Unlimited Opaque Sky Coverage Hours: 1251.2 (14%)
Plot of Net Infrared Radiative Transfer availabilities versus Time over typical meteorological year Kapalua, Hawaii
../sr.scm 911904TYA.CSV nirt-3-5-5-13-32.scm perfect.scm nirt zero-in-range avail hr png
911904TYA.CSV: KAPALUA, HI, 20.950N -156.633E, elevation=80.m
     Description:                     Data range (res):    Source flags:
  hr Time                             1 to 24 h           
 ghi Global Horizontal Irradiance     0 to 1063 W.h/m^2    1:100%
 dni Direct Normal Irradiance         0 to 982 W.h/m^2     1:100%
 dhi Diffuse Horizontal Irradiance    0 to 632 W.h/m^2     1:100%
 tsc Total Sky Cover                  0 to 100 % (10)      A:53% B:47% E:0%
 osc Opaque Sky Cover                 0 to 100 % (10)      B:47% E:53%
 dbt Dry Bulb Temperature          17.8 to 32.2 oC (5/9)   A:52% B:48% E:0%
 dpt Dew Point Temperature          9.4 to 24.4 oC (5/9)   A:52% B:48% E:0%
  ap Atmospheric Pressure         97600 to 100300 Pa (100) A:0% E:100%
  ws Wind Speed                       0 to 25.7 m/s (0.1)  A:52% B:48% E:0%
  ch Ceiling Height                 300 to 21640 m         A:15% B:22% -63%
  pw Precipitable Water              16 to 56 mm           E:100%
Ceiling-Unlimited Opaque Sky Coverage Hours: 1115.3 (13%)
Plot of Net Infrared Radiative Transfer availabilities versus Time over typical meteorological year Molokai (Amos), Hawaii
../sr.scm 911860TYA.CSV nirt-3-5-5-13-32.scm perfect.scm nirt zero-in-range avail hr png
911860TYA.CSV: MOLOKAI (AMOS), HI, 21.150N -157.100E, elevation=137.m
     Description:                     Data range (res):    Source flags:
  hr Time                             1 to 24 h           
 ghi Global Horizontal Irradiance     0 to 1031 W.h/m^2    1:84% 2:16%
 dni Direct Normal Irradiance         0 to 968 W.h/m^2     1:84% 2:16%
 dhi Diffuse Horizontal Irradiance    0 to 639 W.h/m^2     1:84% 2:16%
 tsc Total Sky Cover                  0 to 100 % (10)      A:42% B:41% E:16%
 osc Opaque Sky Cover                 0 to 100 % (10)      A:16% B:41% E:43%
 dbt Dry Bulb Temperature           -31 to 33.9 oC (5/9)   A:87% B:3% E:10%
 dpt Dew Point Temperature          -31 to 26.6 oC (5/9)   A:85% B:5% E:10%
  ap Atmospheric Pressure         99200 to 101000 Pa (100) A:15% B:1% E:84%
  ws Wind Speed                       0 to 28.2 m/s (0.1)  A:90% B:9% E:0%
  ch Ceiling Height                   0 to 21535 m         A:16% B:17% E:0% -67%
  pw Precipitable Water              16 to 56 mm           E:100%
Ceiling-Unlimited Opaque Sky Coverage Hours: 1372.9 (16%)
Plot of Net Infrared Radiative Transfer availabilities versus Time over typical meteorological year Honolulu International Airport, Hawaii
../sr.scm 911820TYA.CSV nirt-3-5-5-13-32.scm perfect.scm nirt zero-in-range avail hr png
911820TYA.CSV: HONOLULU INTL ARPT, HI, 21.317N -157.933E, elevation=2.m
     Description:                     Data range (res):    Source flags:
  hr Time                             1 to 24 h           
 ghi Global Horizontal Irradiance     0 to 1101 W.h/m^2    1:92% 2:8%
 dni Direct Normal Irradiance         0 to 986 W.h/m^2     1:92% 2:8%
 dhi Diffuse Horizontal Irradiance    0 to 609 W.h/m^2     1:92% 2:8%
 tsc Total Sky Cover                  0 to 100 % (10)      A:81% B:11% E:8%
 osc Opaque Sky Cover                 0 to 100 % (10)      A:89% B:11%
 dbt Dry Bulb Temperature          13.3 to 33.3 oC (5/9)   A:89% B:11%
 dpt Dew Point Temperature          8.9 to 24.4 oC (5/9)   A:89% B:11%
  ap Atmospheric Pressure         100100 to 102400 Pa (100) A:89% B:11%
  ws Wind Speed                       0 to 13.4 m/s (0.1)  A:89% B:11%
  ch Ceiling Height                  30 to 20056 m         A:36% B:3% -61%
  pw Precipitable Water              12 to 47 mm           E:100%
Ceiling-Unlimited Opaque Sky Coverage Hours: 1511.3 (17%)
Plot of Net Infrared Radiative Transfer availabilities versus Time over typical meteorological year Barbers Point Naval Air Station, Hawaii
../sr.scm 911780TYA.CSV nirt-3-5-5-13-32.scm perfect.scm nirt zero-in-range avail hr png
911780TYA.CSV: BARBERS POINT NAS, HI, 21.317N -158.067E, elevation=15.m
     Description:                     Data range (res):    Source flags:
  hr Time                             1 to 24 h           
 ghi Global Horizontal Irradiance     0 to 1062 W.h/m^2    1:67% 2:33%
 dni Direct Normal Irradiance         0 to 932 W.h/m^2     1:67% 2:33%
 dhi Diffuse Horizontal Irradiance    0 to 597 W.h/m^2     1:67% 2:33%
 tsc Total Sky Cover                  0 to 100 % (10)      A:67% B:2% E:31%
 osc Opaque Sky Cover                 0 to 100 % (10)      A:30% B:2% E:68%
 dbt Dry Bulb Temperature          -9.3 to 35.6 oC (5/9)   A:97% B:2% E:1%
 dpt Dew Point Temperature         -9.3 to 28.3 oC (5/9)   A:95% B:5% E:1%
  ap Atmospheric Pressure         100200 to 102400 Pa (100) A:93% B:7%
  ws Wind Speed                       0 to 12.4 m/s (0.1)  A:97% B:2% E:1%
  ch Ceiling Height                   0 to 21222 m         A:25% B:2% E:0% -73%
  pw Precipitable Water              11 to 55 mm           E:100%
Ceiling-Unlimited Opaque Sky Coverage Hours: 2108.3 (24%)
Plot of Net Infrared Radiative Transfer availabilities versus Time over typical meteorological year Kaneohe Bay Marine Corps Air Station, Hawaii
../sr.scm 911760TYA.CSV nirt-3-5-5-13-32.scm perfect.scm nirt zero-in-range avail hr png
911760TYA.CSV: KANEOHE BAY MCAS, HI, 21.450N -157.783E, elevation=3.m
     Description:                     Data range (res):    Source flags:
  hr Time                             1 to 24 h           
 ghi Global Horizontal Irradiance     0 to 1064 W.h/m^2    1:92% 2:8%
 dni Direct Normal Irradiance         0 to 979 W.h/m^2     1:92% 2:8%
 dhi Diffuse Horizontal Irradiance    0 to 629 W.h/m^2     1:92% 2:8%
 tsc Total Sky Cover                  0 to 100 % (10)      A:80% B:4% E:16%
 osc Opaque Sky Cover                 0 to 100 % (10)      B:4% E:96%
 dbt Dry Bulb Temperature            14 to 31.7 oC (5/9)   A:80% B:4% E:16%
 dpt Dew Point Temperature           -1 to 26.1 oC (5/9)   A:80% B:4% E:16%
  ap Atmospheric Pressure         100300 to 102500 Pa (100) A:78% B:10% E:11%
  ws Wind Speed                       0 to 11.3 m/s (0.1)  A:80% B:3% E:16%
  ch Ceiling Height                   0 to 21987 m         A:40% B:3% E:10% -47%
  pw Precipitable Water              15 to 60 mm           E:100%
Ceiling-Unlimited Opaque Sky Coverage Hours: 1560.3 (18%)
Plot of Net Infrared Radiative Transfer availabilities versus Time over typical meteorological year Lihue Airport, Hawaii
../sr.scm 911650TYA.CSV nirt-3-5-5-13-32.scm perfect.scm nirt zero-in-range avail hr png
911650TYA.CSV: LIHUE AIRPORT, HI, 21.983N -159.333E, elevation=31.m
     Description:                     Data range (res):    Source flags:
  hr Time                             1 to 24 h           
 ghi Global Horizontal Irradiance     0 to 1037 W.h/m^2    1:83% 2:17%
 dni Direct Normal Irradiance         0 to 995 W.h/m^2     1:83% 2:17%
 dhi Diffuse Horizontal Irradiance    0 to 596 W.h/m^2     1:83% 2:17%
 tsc Total Sky Cover                  0 to 100 % (10)      A:61% B:23% E:16%
 osc Opaque Sky Cover                 0 to 100 % (10)      A:69% B:23% E:8%
 dbt Dry Bulb Temperature          12.8 to 32.2 oC (5/9)   A:78% B:22%
 dpt Dew Point Temperature          7.8 to 25.1 oC (5/9)   A:78% B:22%
  ap Atmospheric Pressure         99200 to 102000 Pa (100) A:78% B:22%
  ws Wind Speed                       0 to 16.5 m/s (0.1)  A:78% B:22%
  ch Ceiling Height                 150 to 9144 m          A:44% B:10% -46%
  pw Precipitable Water              17 to 53 mm           E:100%
Ceiling-Unlimited Opaque Sky Coverage Hours: 1235.8 (14%)

Copyright © 2010, 2011 Aubrey Jaffer

I am a guest and not a member of the MIT Computer Science and Artificial Intelligence Laboratory.  My actions and comments do not reflect in any way on MIT.
SimRoof
agj @ alum.mit.edu
Go Figure!