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|
GSFC (N 38°59', W 76°50', Alt 87 m )AERONET Algorithm: Version 2
Site Index
Year: 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016
Channel (nm): 1020, 870, 670, 500, 440, 380, 340, 500 (not interpolated), 1640
Aerosol optical depth at 500 nm (taua500), Angstrom exponent (alpha440-870), precipitable water (PW),
the associated standard deviations (sigma), the number of days (N) and months (Month) in the observation periods.
|
Overall Averages of |
taua500 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Month |
|
JAN | 0.079 | 0.047 |
••• | ••• |
••• | ••• | 352 |
21 |
FEB | 0.098 | 0.054 |
••• | ••• |
••• | ••• | 343 |
21 |
MAR | 0.130 | 0.082 |
••• | ••• |
••• | ••• | 410 |
21 |
APR | 0.170 | 0.100 |
••• | ••• |
••• | ••• | 428 |
22 |
MAY | 0.234 | 0.154 |
••• | ••• |
••• | ••• | 452 |
22 |
JUN | 0.312 | 0.223 |
••• | ••• |
••• | ••• | 479 |
22 |
JUL | 0.372 | 0.263 |
••• | ••• |
••• | ••• | 514 |
22 |
AUG | 0.372 | 0.261 |
••• | ••• |
••• | ••• | 507 |
22 |
SEP | 0.211 | 0.184 |
••• | ••• |
••• | ••• | 446 |
22 |
OCT | 0.122 | 0.091 |
••• | ••• |
••• | ••• | 428 |
22 |
NOV | 0.092 | 0.067 |
••• | ••• |
••• | ••• | 394 |
22 |
DEC | 0.080 | 0.050 |
••• | ••• |
••• | ••• | 368 |
22 |
YEAR | 0.189 | 0.111 |
••• | ••• |
••• | ••• | 5121 |
261 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 1995 Top | Site Index
Aerosol optical depth at 500 nm (taua500), Angstrom exponent (alpha440-870), precipitable water (PW),
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs).
|
1995 Averages of |
taua500 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | ••• | ••• |
••• | ••• |
••• | ••• | ••• |
••• |
FEB | ••• | ••• |
••• | ••• |
••• | ••• | ••• |
••• |
MAR | 0.094 | 0.056 |
••• | ••• |
••• | ••• | 4 |
119 |
APR | 0.206 | 0.112 |
••• | ••• |
••• | ••• | 18 |
412 |
MAY | 0.205 | 0.100 |
••• | ••• |
••• | ••• | 19 |
435 |
JUN | 0.452 | 0.244 |
••• | ••• |
••• | ••• | 15 |
354 |
JUL | 0.546 | 0.288 |
••• | ••• |
••• | ••• | 24 |
417 |
AUG | 0.388 | 0.274 |
••• | ••• |
••• | ••• | 25 |
595 |
SEP | 0.323 | 0.221 |
••• | ••• |
••• | ••• | 22 |
485 |
OCT | 0.224 | 0.038 |
••• | ••• |
••• | ••• | 2 |
41 |
NOV | 0.093 | 0.042 |
••• | ••• |
••• | ••• | 9 |
196 |
DEC | 0.072 | 0.023 |
••• | ••• |
••• | ••• | 16 |
344 |
YEAR | ••• | ••• |
••• | ••• |
••• | ••• | 154 |
3398 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 1996 Top | Site Index
Aerosol optical depth at 500 nm (taua500), Angstrom exponent (alpha440-870), precipitable water (PW),
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs).
|
1996 Averages of |
taua500 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.128 | 0.072 |
••• | ••• |
••• | ••• | 11 |
157 |
FEB | 0.081 | 0.038 |
••• | ••• |
••• | ••• | 9 |
191 |
MAR | 0.124 | 0.099 |
••• | ••• |
••• | ••• | 16 |
450 |
APR | 0.207 | 0.107 |
••• | ••• |
••• | ••• | 21 |
474 |
MAY | 0.253 | 0.131 |
••• | ••• |
••• | ••• | 16 |
411 |
JUN | 0.518 | 0.404 |
••• | ••• |
••• | ••• | 20 |
504 |
JUL | 0.545 | 0.488 |
••• | ••• |
••• | ••• | 21 |
328 |
AUG | 0.629 | 0.368 |
••• | ••• |
••• | ••• | 26 |
502 |
SEP | 0.304 | 0.280 |
••• | ••• |
••• | ••• | 9 |
171 |
OCT | 0.156 | 0.125 |
••• | ••• |
••• | ••• | 19 |
429 |
NOV | 0.080 | 0.025 |
••• | ••• |
••• | ••• | 14 |
215 |
DEC | 0.084 | 0.034 |
••• | ••• |
••• | ••• | 9 |
169 |
YEAR | 0.259 | 0.198 |
••• | ••• |
••• | ••• | 191 |
4001 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 1997 Top | Site Index
Aerosol optical depth at 500 nm (taua500), Angstrom exponent (alpha440-870), precipitable water (PW),
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs).
|
1997 Averages of |
taua500 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.081 | 0.031 |
••• | ••• |
••• | ••• | 7 |
92 |
FEB | 0.154 | 0.081 |
••• | ••• |
••• | ••• | 13 |
216 |
MAR | 0.114 | 0.052 |
••• | ••• |
••• | ••• | 18 |
393 |
APR | 0.149 | 0.063 |
••• | ••• |
••• | ••• | 9 |
238 |
MAY | 0.171 | 0.084 |
••• | ••• |
••• | ••• | 17 |
432 |
JUN | 0.272 | 0.185 |
••• | ••• |
••• | ••• | 19 |
479 |
JUL | 0.347 | 0.266 |
••• | ••• |
••• | ••• | 23 |
564 |
AUG | 0.373 | 0.257 |
••• | ••• |
••• | ••• | 25 |
346 |
SEP | 0.257 | 0.240 |
••• | ••• |
••• | ••• | 24 |
659 |
OCT | 0.206 | 0.195 |
••• | ••• |
••• | ••• | 16 |
506 |
NOV | 0.104 | 0.054 |
••• | ••• |
••• | ••• | 13 |
496 |
DEC | 0.073 | 0.023 |
••• | ••• |
••• | ••• | 16 |
279 |
YEAR | 0.192 | 0.101 |
••• | ••• |
••• | ••• | 200 |
4700 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 1998 Top | Site Index
Aerosol optical depth at 500 nm (taua500), Angstrom exponent (alpha440-870), precipitable water (PW),
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs).
|
1998 Averages of |
taua500 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.101 | 0.054 |
••• | ••• |
••• | ••• | 18 |
271 |
FEB | 0.109 | 0.046 |
••• | ••• |
••• | ••• | 12 |
218 |
MAR | 0.156 | 0.086 |
••• | ••• |
••• | ••• | 18 |
796 |
APR | 0.171 | 0.099 |
••• | ••• |
••• | ••• | 19 |
450 |
MAY | 0.298 | 0.153 |
••• | ••• |
••• | ••• | 18 |
461 |
JUN | 0.282 | 0.201 |
••• | ••• |
••• | ••• | 18 |
247 |
JUL | 0.494 | 0.276 |
••• | ••• |
••• | ••• | 23 |
424 |
AUG | 0.363 | 0.204 |
••• | ••• |
••• | ••• | 23 |
500 |
SEP | 0.360 | 0.225 |
••• | ••• |
••• | ••• | 25 |
633 |
OCT | 0.105 | 0.063 |
••• | ••• |
••• | ••• | 17 |
457 |
NOV | 0.094 | 0.066 |
••• | ••• |
••• | ••• | 14 |
276 |
DEC | 0.112 | 0.105 |
••• | ••• |
••• | ••• | 17 |
319 |
YEAR | 0.220 | 0.134 |
••• | ••• |
••• | ••• | 222 |
5052 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 1999 Top | Site Index
Aerosol optical depth at 500 nm (taua500), Angstrom exponent (alpha440-870), precipitable water (PW),
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs).
|
1999 Averages of |
taua500 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.078 | 0.042 |
••• | ••• |
••• | ••• | 16 |
303 |
FEB | 0.122 | 0.071 |
••• | ••• |
••• | ••• | 14 |
280 |
MAR | 0.132 | 0.069 |
••• | ••• |
••• | ••• | 23 |
680 |
APR | 0.163 | 0.130 |
••• | ••• |
••• | ••• | 21 |
552 |
MAY | 0.193 | 0.097 |
••• | ••• |
••• | ••• | 25 |
614 |
JUN | 0.281 | 0.163 |
••• | ••• |
••• | ••• | 20 |
308 |
JUL | 0.400 | 0.275 |
••• | ••• |
••• | ••• | 24 |
441 |
AUG | 0.370 | 0.217 |
••• | ••• |
••• | ••• | 20 |
346 |
SEP | 0.181 | 0.208 |
••• | ••• |
••• | ••• | 17 |
447 |
OCT | 0.114 | 0.060 |
••• | ••• |
••• | ••• | 25 |
621 |
NOV | 0.134 | 0.119 |
••• | ••• |
••• | ••• | 24 |
486 |
DEC | 0.077 | 0.043 |
••• | ••• |
••• | ••• | 23 |
645 |
YEAR | 0.187 | 0.108 |
••• | ••• |
••• | ••• | 252 |
5723 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2000 Top | Site Index
Aerosol optical depth at 500 nm (taua500), Angstrom exponent (alpha440-870), precipitable water (PW),
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs).
|
2000 Averages of |
taua500 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.078 | 0.053 |
••• | ••• |
••• | ••• | 17 |
293 |
FEB | 0.120 | 0.069 |
••• | ••• |
••• | ••• | 17 |
493 |
MAR | 0.130 | 0.079 |
••• | ••• |
••• | ••• | 23 |
762 |
APR | 0.164 | 0.087 |
••• | ••• |
••• | ••• | 16 |
359 |
MAY | 0.347 | 0.194 |
••• | ••• |
••• | ••• | 20 |
529 |
JUN | 0.387 | 0.214 |
••• | ••• |
••• | ••• | 21 |
446 |
JUL | 0.356 | 0.225 |
••• | ••• |
••• | ••• | 21 |
449 |
AUG | 0.393 | 0.199 |
••• | ••• |
••• | ••• | 21 |
357 |
SEP | 0.177 | 0.141 |
••• | ••• |
••• | ••• | 20 |
566 |
OCT | 0.150 | 0.116 |
••• | ••• |
••• | ••• | 23 |
743 |
NOV | 0.087 | 0.055 |
••• | ••• |
••• | ••• | 21 |
437 |
DEC | 0.081 | 0.036 |
••• | ••• |
••• | ••• | 21 |
493 |
YEAR | 0.206 | 0.126 |
••• | ••• |
••• | ••• | 241 |
5927 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2001 Top | Site Index
Aerosol optical depth at 500 nm (taua500), Angstrom exponent (alpha440-870), precipitable water (PW),
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs).
|
2001 Averages of |
taua500 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.088 | 0.058 |
••• | ••• |
••• | ••• | 16 |
359 |
FEB | 0.123 | 0.061 |
••• | ••• |
••• | ••• | 21 |
431 |
MAR | 0.114 | 0.043 |
••• | ••• |
••• | ••• | 19 |
559 |
APR | 0.233 | 0.119 |
••• | ••• |
••• | ••• | 21 |
565 |
MAY | 0.311 | 0.268 |
••• | ••• |
••• | ••• | 22 |
566 |
JUN | 0.432 | 0.298 |
••• | ••• |
••• | ••• | 24 |
664 |
JUL | 0.220 | 0.145 |
••• | ••• |
••• | ••• | 22 |
556 |
AUG | 0.592 | 0.297 |
••• | ••• |
••• | ••• | 24 |
445 |
SEP | 0.182 | 0.135 |
••• | ••• |
••• | ••• | 23 |
569 |
OCT | 0.125 | 0.084 |
••• | ••• |
••• | ••• | 26 |
1006 |
NOV | 0.141 | 0.096 |
••• | ••• |
••• | ••• | 25 |
810 |
DEC | 0.075 | 0.038 |
••• | ••• |
••• | ••• | 22 |
494 |
YEAR | 0.220 | 0.156 |
••• | ••• |
••• | ••• | 265 |
7024 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2002 Top | Site Index
Aerosol optical depth at 500 nm (taua500), Angstrom exponent (alpha440-870), precipitable water (PW),
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs).
|
2002 Averages of |
taua500 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.067 | 0.046 |
••• | ••• |
••• | ••• | 17 |
445 |
FEB | 0.090 | 0.059 |
••• | ••• |
••• | ••• | 21 |
638 |
MAR | 0.149 | 0.083 |
••• | ••• |
••• | ••• | 17 |
490 |
APR | 0.184 | 0.089 |
••• | ••• |
••• | ••• | 24 |
663 |
MAY | 0.263 | 0.234 |
••• | ••• |
••• | ••• | 26 |
700 |
JUN | 0.440 | 0.271 |
••• | ••• |
••• | ••• | 26 |
707 |
JUL | 0.613 | 0.430 |
••• | ••• |
••• | ••• | 23 |
642 |
AUG | 0.414 | 0.249 |
••• | ••• |
••• | ••• | 23 |
645 |
SEP | 0.237 | 0.201 |
••• | ••• |
••• | ••• | 24 |
782 |
OCT | 0.202 | 0.117 |
••• | ••• |
••• | ••• | 14 |
287 |
NOV | 0.087 | 0.044 |
••• | ••• |
••• | ••• | 13 |
314 |
DEC | 0.073 | 0.044 |
••• | ••• |
••• | ••• | 18 |
371 |
YEAR | 0.235 | 0.172 |
••• | ••• |
••• | ••• | 246 |
6684 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2003 Top | Site Index
Aerosol optical depth at 500 nm (taua500), Angstrom exponent (alpha440-870), precipitable water (PW),
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs).
|
2003 Averages of |
taua500 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.072 | 0.033 |
••• | ••• |
••• | ••• | 19 |
448 |
FEB | 0.091 | 0.046 |
••• | ••• |
••• | ••• | 10 |
285 |
MAR | 0.158 | 0.086 |
••• | ••• |
••• | ••• | 19 |
578 |
APR | 0.230 | 0.164 |
••• | ••• |
••• | ••• | 21 |
643 |
MAY | 0.332 | 0.165 |
••• | ••• |
••• | ••• | 12 |
194 |
JUN | 0.399 | 0.184 |
••• | ••• |
••• | ••• | 16 |
446 |
JUL | 0.370 | 0.194 |
••• | ••• |
••• | ••• | 21 |
415 |
AUG | 0.582 | 0.265 |
••• | ••• |
••• | ••• | 20 |
412 |
SEP | 0.220 | 0.217 |
••• | ••• |
••• | ••• | 20 |
497 |
OCT | 0.124 | 0.085 |
••• | ••• |
••• | ••• | 21 |
524 |
NOV | 0.097 | 0.063 |
••• | ••• |
••• | ••• | 20 |
467 |
DEC | 0.055 | 0.026 |
••• | ••• |
••• | ••• | 19 |
402 |
YEAR | 0.227 | 0.163 |
••• | ••• |
••• | ••• | 218 |
5311 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2004 Top | Site Index
Aerosol optical depth at 500 nm (taua500), Angstrom exponent (alpha440-870), precipitable water (PW),
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs).
|
2004 Averages of |
taua500 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.071 | 0.040 |
••• | ••• |
••• | ••• | 19 |
397 |
FEB | 0.086 | 0.058 |
••• | ••• |
••• | ••• | 20 |
575 |
MAR | 0.144 | 0.063 |
••• | ••• |
••• | ••• | 19 |
485 |
APR | 0.199 | 0.112 |
••• | ••• |
••• | ••• | 19 |
481 |
MAY | 0.314 | 0.125 |
••• | ••• |
••• | ••• | 22 |
491 |
JUN | 0.316 | 0.224 |
••• | ••• |
••• | ••• | 19 |
437 |
JUL | 0.607 | 0.336 |
••• | ••• |
••• | ••• | 21 |
445 |
AUG | 0.412 | 0.209 |
••• | ••• |
••• | ••• | 21 |
451 |
SEP | 0.182 | 0.124 |
••• | ••• |
••• | ••• | 14 |
404 |
OCT | 0.105 | 0.072 |
••• | ••• |
••• | ••• | 19 |
567 |
NOV | 0.068 | 0.067 |
••• | ••• |
••• | ••• | 20 |
487 |
DEC | 0.091 | 0.071 |
••• | ••• |
••• | ••• | 20 |
499 |
YEAR | 0.216 | 0.167 |
••• | ••• |
••• | ••• | 233 |
5719 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2005 Top | Site Index
Aerosol optical depth at 500 nm (taua500), Angstrom exponent (alpha440-870), precipitable water (PW),
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs).
|
2005 Averages of |
taua500 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.084 | 0.061 |
••• | ••• |
••• | ••• | 14 |
315 |
FEB | 0.097 | 0.052 |
••• | ••• |
••• | ••• | 20 |
452 |
MAR | 0.156 | 0.127 |
••• | ••• |
••• | ••• | 20 |
424 |
APR | 0.159 | 0.109 |
••• | ••• |
••• | ••• | 20 |
697 |
MAY | 0.238 | 0.155 |
••• | ••• |
••• | ••• | 20 |
531 |
JUN | 0.335 | 0.167 |
••• | ••• |
••• | ••• | 22 |
559 |
JUL | 0.420 | 0.178 |
••• | ••• |
••• | ••• | 22 |
468 |
AUG | 0.534 | 0.359 |
••• | ••• |
••• | ••• | 24 |
706 |
SEP | 0.237 | 0.217 |
••• | ••• |
••• | ••• | 25 |
875 |
OCT | 0.103 | 0.063 |
••• | ••• |
••• | ••• | 16 |
523 |
NOV | 0.084 | 0.047 |
••• | ••• |
••• | ••• | 20 |
487 |
DEC | 0.094 | 0.051 |
••• | ••• |
••• | ••• | 19 |
384 |
YEAR | 0.212 | 0.148 |
••• | ••• |
••• | ••• | 242 |
6421 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2006 Top | Site Index
Aerosol optical depth at 500 nm (taua500), Angstrom exponent (alpha440-870), precipitable water (PW),
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs).
|
2006 Averages of |
taua500 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.083 | 0.062 |
••• | ••• |
••• | ••• | 18 |
377 |
FEB | 0.092 | 0.035 |
••• | ••• |
••• | ••• | 17 |
526 |
MAR | 0.135 | 0.094 |
••• | ••• |
••• | ••• | 23 |
738 |
APR | 0.155 | 0.077 |
••• | ••• |
••• | ••• | 23 |
784 |
MAY | 0.223 | 0.155 |
••• | ••• |
••• | ••• | 26 |
773 |
JUN | 0.305 | 0.172 |
••• | ••• |
••• | ••• | 22 |
603 |
JUL | 0.511 | 0.237 |
••• | ••• |
••• | ••• | 24 |
551 |
AUG | 0.344 | 0.236 |
••• | ••• |
••• | ••• | 25 |
610 |
SEP | 0.282 | 0.231 |
••• | ••• |
••• | ••• | 17 |
476 |
OCT | 0.110 | 0.078 |
••• | ••• |
••• | ••• | 24 |
746 |
NOV | 0.088 | 0.028 |
••• | ••• |
••• | ••• | 14 |
403 |
DEC | 0.096 | 0.056 |
••• | ••• |
••• | ••• | 22 |
444 |
YEAR | 0.202 | 0.134 |
••• | ••• |
••• | ••• | 255 |
7031 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2007 Top | Site Index
Aerosol optical depth at 500 nm (taua500), Angstrom exponent (alpha440-870), precipitable water (PW),
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs).
|
2007 Averages of |
taua500 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.062 | 0.019 |
••• | ••• |
••• | ••• | 18 |
446 |
FEB | 0.081 | 0.040 |
••• | ••• |
••• | ••• | 19 |
652 |
MAR | 0.166 | 0.133 |
••• | ••• |
••• | ••• | 24 |
722 |
APR | 0.178 | 0.110 |
••• | ••• |
••• | ••• | 17 |
438 |
MAY | 0.300 | 0.205 |
••• | ••• |
••• | ••• | 27 |
917 |
JUN | 0.434 | 0.283 |
••• | ••• |
••• | ••• | 27 |
695 |
JUL | 0.371 | 0.208 |
••• | ••• |
••• | ••• | 27 |
667 |
AUG | 0.559 | 0.277 |
••• | ••• |
••• | ••• | 24 |
642 |
SEP | 0.227 | 0.185 |
••• | ••• |
••• | ••• | 27 |
1062 |
OCT | 0.157 | 0.132 |
••• | ••• |
••• | ••• | 23 |
716 |
NOV | 0.124 | 0.087 |
••• | ••• |
••• | ••• | 21 |
383 |
DEC | 0.086 | 0.054 |
••• | ••• |
••• | ••• | 14 |
293 |
YEAR | 0.229 | 0.156 |
••• | ••• |
••• | ••• | 268 |
7633 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2008 Top | Site Index
Aerosol optical depth at 500 nm (taua500), Angstrom exponent (alpha440-870), precipitable water (PW),
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs).
|
2008 Averages of |
taua500 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.089 | 0.051 |
••• | ••• |
••• | ••• | 22 |
474 |
FEB | 0.101 | 0.061 |
••• | ••• |
••• | ••• | 17 |
420 |
MAR | 0.147 | 0.082 |
••• | ••• |
••• | ••• | 23 |
636 |
APR | 0.216 | 0.108 |
••• | ••• |
••• | ••• | 16 |
382 |
MAY | 0.196 | 0.117 |
••• | ••• |
••• | ••• | 22 |
635 |
JUN | 0.303 | 0.176 |
••• | ••• |
••• | ••• | 28 |
709 |
JUL | 0.349 | 0.182 |
••• | ••• |
••• | ••• | 24 |
645 |
AUG | 0.261 | 0.163 |
••• | ••• |
••• | ••• | 26 |
723 |
SEP | 0.183 | 0.097 |
••• | ••• |
••• | ••• | 20 |
556 |
OCT | 0.094 | 0.042 |
••• | ••• |
••• | ••• | 24 |
756 |
NOV | 0.130 | 0.103 |
••• | ••• |
••• | ••• | 16 |
377 |
DEC | 0.080 | 0.037 |
••• | ••• |
••• | ••• | 16 |
265 |
YEAR | 0.179 | 0.089 |
••• | ••• |
••• | ••• | 254 |
6578 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2009 Top | Site Index
Aerosol optical depth at 500 nm (taua500), Angstrom exponent (alpha440-870), precipitable water (PW),
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs).
|
2009 Averages of |
taua500 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.084 | 0.057 |
••• | ••• |
••• | ••• | 18 |
497 |
FEB | 0.109 | 0.047 |
••• | ••• |
••• | ••• | 22 |
572 |
MAR | 0.147 | 0.108 |
••• | ••• |
••• | ••• | 18 |
522 |
APR | 0.131 | 0.052 |
••• | ••• |
••• | ••• | 18 |
618 |
MAY | 0.177 | 0.103 |
••• | ••• |
••• | ••• | 16 |
492 |
JUN | 0.227 | 0.105 |
••• | ••• |
••• | ••• | 23 |
434 |
JUL | 0.267 | 0.115 |
••• | ••• |
••• | ••• | 25 |
517 |
AUG | 0.302 | 0.120 |
••• | ••• |
••• | ••• | 24 |
496 |
SEP | 0.153 | 0.079 |
••• | ••• |
••• | ••• | 18 |
521 |
OCT | 0.097 | 0.042 |
••• | ••• |
••• | ••• | 15 |
480 |
NOV | 0.114 | 0.052 |
••• | ••• |
••• | ••• | 15 |
460 |
DEC | 0.070 | 0.034 |
••• | ••• |
••• | ••• | 17 |
433 |
YEAR | 0.156 | 0.074 |
••• | ••• |
••• | ••• | 229 |
6042 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2010 Top | Site Index
Aerosol optical depth at 500 nm (taua500), Angstrom exponent (alpha440-870), precipitable water (PW),
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs).
|
2010 Averages of |
taua500 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.087 | 0.047 |
••• | ••• |
••• | ••• | 20 |
376 |
FEB | 0.105 | 0.055 |
••• | ••• |
••• | ••• | 15 |
419 |
MAR | 0.098 | 0.068 |
••• | ••• |
••• | ••• | 16 |
678 |
APR | 0.164 | 0.068 |
••• | ••• |
••• | ••• | 24 |
846 |
MAY | 0.161 | 0.099 |
••• | ••• |
••• | ••• | 20 |
626 |
JUN | 0.232 | 0.112 |
••• | ••• |
••• | ••• | 27 |
655 |
JUL | 0.285 | 0.172 |
••• | ••• |
••• | ••• | 26 |
792 |
AUG | 0.320 | 0.135 |
••• | ••• |
••• | ••• | 23 |
616 |
SEP | 0.144 | 0.111 |
••• | ••• |
••• | ••• | 23 |
893 |
OCT | 0.118 | 0.078 |
••• | ••• |
••• | ••• | 22 |
786 |
NOV | 0.071 | 0.041 |
••• | ••• |
••• | ••• | 22 |
668 |
DEC | 0.070 | 0.033 |
••• | ••• |
••• | ••• | 14 |
338 |
YEAR | 0.155 | 0.083 |
••• | ••• |
••• | ••• | 252 |
7693 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2011 Top | Site Index
Aerosol optical depth at 500 nm (taua500), Angstrom exponent (alpha440-870), precipitable water (PW),
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs).
|
2011 Averages of |
taua500 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.093 | 0.056 |
••• | ••• |
••• | ••• | 14 |
264 |
FEB | 0.103 | 0.069 |
••• | ••• |
••• | ••• | 19 |
471 |
MAR | 0.118 | 0.049 |
••• | ••• |
••• | ••• | 20 |
573 |
APR | 0.189 | 0.116 |
••• | ••• |
••• | ••• | 17 |
420 |
MAY | 0.224 | 0.110 |
••• | ••• |
••• | ••• | 21 |
433 |
JUN | 0.299 | 0.192 |
••• | ••• |
••• | ••• | 26 |
593 |
JUL | 0.323 | 0.171 |
••• | ••• |
••• | ••• | 28 |
850 |
AUG | 0.234 | 0.144 |
••• | ••• |
••• | ••• | 19 |
543 |
SEP | 0.376 | 0.225 |
••• | ••• |
••• | ••• | 9 |
251 |
OCT | 0.107 | 0.041 |
••• | ••• |
••• | ••• | 20 |
563 |
NOV | 0.074 | 0.029 |
••• | ••• |
••• | ••• | 18 |
534 |
DEC | 0.068 | 0.017 |
••• | ••• |
••• | ••• | 17 |
381 |
YEAR | 0.184 | 0.106 |
••• | ••• |
••• | ••• | 228 |
5876 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2012 Top | Site Index
Aerosol optical depth at 500 nm (taua500), Angstrom exponent (alpha440-870), precipitable water (PW),
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs).
|
2012 Averages of |
taua500 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.076 | 0.030 |
••• | ••• |
••• | ••• | 22 |
445 |
FEB | 0.087 | 0.024 |
••• | ••• |
••• | ••• | 20 |
724 |
MAR | 0.156 | 0.076 |
••• | ••• |
••• | ••• | 23 |
769 |
APR | 0.135 | 0.058 |
••• | ••• |
••• | ••• | 24 |
732 |
MAY | 0.244 | 0.126 |
••• | ••• |
••• | ••• | 18 |
572 |
JUN | 0.239 | 0.179 |
••• | ••• |
••• | ••• | 25 |
713 |
JUL | 0.280 | 0.090 |
••• | ••• |
••• | ••• | 24 |
561 |
AUG | 0.325 | 0.153 |
••• | ••• |
••• | ••• | 21 |
467 |
SEP | 0.153 | 0.107 |
••• | ••• |
••• | ••• | 23 |
699 |
OCT | 0.114 | 0.070 |
••• | ••• |
••• | ••• | 17 |
449 |
NOV | 0.084 | 0.023 |
••• | ••• |
••• | ••• | 18 |
493 |
DEC | 0.105 | 0.071 |
••• | ••• |
••• | ••• | 15 |
208 |
YEAR | 0.167 | 0.084 |
••• | ••• |
••• | ••• | 250 |
6832 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2013 Top | Site Index
Aerosol optical depth at 500 nm (taua500), Angstrom exponent (alpha440-870), precipitable water (PW),
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs).
|
2013 Averages of |
taua500 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.080 | 0.042 |
••• | ••• |
••• | ••• | 18 |
408 |
FEB | 0.089 | 0.029 |
••• | ••• |
••• | ••• | 14 |
406 |
MAR | 0.090 | 0.037 |
••• | ••• |
••• | ••• | 17 |
499 |
APR | 0.155 | 0.045 |
••• | ••• |
••• | ••• | 22 |
756 |
MAY | 0.153 | 0.084 |
••• | ••• |
••• | ••• | 20 |
549 |
JUN | 0.185 | 0.093 |
••• | ••• |
••• | ••• | 19 |
584 |
JUL | 0.212 | 0.111 |
••• | ••• |
••• | ••• | 21 |
518 |
AUG | 0.222 | 0.154 |
••• | ••• |
••• | ••• | 19 |
439 |
SEP | 0.137 | 0.147 |
••• | ••• |
••• | ••• | 27 |
837 |
OCT | 0.121 | 0.066 |
••• | ••• |
••• | ••• | 19 |
599 |
NOV | 0.051 | 0.023 |
••• | ••• |
••• | ••• | 20 |
467 |
DEC | 0.078 | 0.045 |
••• | ••• |
••• | ••• | 16 |
293 |
YEAR | 0.131 | 0.056 |
••• | ••• |
••• | ••• | 232 |
6355 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2014 Top | Site Index
Aerosol optical depth at 500 nm (taua500), Angstrom exponent (alpha440-870), precipitable water (PW),
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs).
|
2014 Averages of |
taua500 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.060 | 0.027 |
••• | ••• |
••• | ••• | 17 |
388 |
FEB | 0.082 | 0.044 |
••• | ••• |
••• | ••• | 13 |
444 |
MAR | 0.091 | 0.030 |
••• | ••• |
••• | ••• | 16 |
453 |
APR | 0.127 | 0.062 |
••• | ••• |
••• | ••• | 20 |
533 |
MAY | 0.169 | 0.067 |
••• | ••• |
••• | ••• | 24 |
546 |
JUN | 0.182 | 0.072 |
••• | ••• |
••• | ••• | 24 |
764 |
JUL | 0.268 | 0.171 |
••• | ••• |
••• | ••• | 22 |
641 |
AUG | 0.265 | 0.220 |
••• | ••• |
••• | ••• | 22 |
643 |
SEP | 0.123 | 0.069 |
••• | ••• |
••• | ••• | 22 |
521 |
OCT | 0.102 | 0.081 |
••• | ••• |
••• | ••• | 21 |
513 |
NOV | 0.074 | 0.030 |
••• | ••• |
••• | ••• | 19 |
411 |
DEC | 0.081 | 0.075 |
••• | ••• |
••• | ••• | 14 |
253 |
YEAR | 0.135 | 0.072 |
••• | ••• |
••• | ••• | 234 |
6110 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2015 Top | Site Index
Aerosol optical depth at 500 nm (taua500), Angstrom exponent (alpha440-870), precipitable water (PW),
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs).
|
2015 Averages of |
taua500 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.058 | 0.024 |
••• | ••• |
••• | ••• | 13 |
352 |
FEB | 0.070 | 0.022 |
••• | ••• |
••• | ••• | 15 |
422 |
MAR | 0.089 | 0.046 |
••• | ••• |
••• | ••• | 17 |
431 |
APR | 0.118 | 0.073 |
••• | ••• |
••• | ••• | 18 |
586 |
MAY | 0.198 | 0.094 |
••• | ••• |
••• | ••• | 25 |
559 |
JUN | 0.234 | 0.180 |
••• | ••• |
••• | ••• | 17 |
341 |
JUL | 0.263 | 0.150 |
••• | ••• |
••• | ••• | 23 |
585 |
AUG | 0.174 | 0.071 |
••• | ••• |
••• | ••• | 24 |
700 |
SEP | 0.174 | 0.176 |
••• | ••• |
••• | ••• | 18 |
603 |
OCT | 0.072 | 0.041 |
••• | ••• |
••• | ••• | 21 |
647 |
NOV | 0.050 | 0.025 |
••• | ••• |
••• | ••• | 16 |
503 |
DEC | 0.065 | 0.033 |
••• | ••• |
••• | ••• | 11 |
292 |
YEAR | 0.130 | 0.075 |
••• | ••• |
••• | ••• | 218 |
6021 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2016 Top | Site Index
Aerosol optical depth at 500 nm (taua500), Angstrom exponent (alpha440-870), precipitable water (PW),
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs).
|
2016 Averages of |
taua500 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.049 | 0.027 |
••• | ••• |
••• | ••• | 18 |
492 |
FEB | 0.054 | 0.022 |
••• | ••• |
••• | ••• | 15 |
387 |
MAR | 0.092 | 0.044 |
••• | ••• |
••• | ••• | 17 |
512 |
APR | 0.100 | 0.038 |
••• | ••• |
••• | ••• | 20 |
780 |
MAY | 0.192 | 0.092 |
••• | ••• |
••• | ••• | 16 |
346 |
JUN | 0.137 | 0.076 |
••• | ••• |
••• | ••• | 21 |
767 |
JUL | 0.183 | 0.074 |
••• | ••• |
••• | ••• | 25 |
594 |
AUG | 0.123 | 0.049 |
••• | ••• |
••• | ••• | 28 |
969 |
SEP | 0.150 | 0.081 |
••• | ••• |
••• | ••• | 19 |
612 |
OCT | 0.095 | 0.063 |
••• | ••• |
••• | ••• | 24 |
720 |
NOV | 0.077 | 0.069 |
••• | ••• |
••• | ••• | 22 |
767 |
DEC | 0.058 | 0.016 |
••• | ••• |
••• | ••• | 12 |
283 |
YEAR | 0.109 | 0.049 |
••• | ••• |
••• | ••• | 237 |
7229 |
|
|