Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.cosmos.ru/earth/pres2006/belov2.pdf Дата изменения: Mon Feb 19 18:37:48 2007 Дата индексирования: Tue Oct 2 05:15:03 2012 Кодировка: Windows-1251 Поисковые слова: observatory

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.., .., .., .. e-mail: belov@iao.ru


: , ()
2


=
+
: Modtran, Lowtran, 6S, . . : ERDAS+ATCOR, ENVI+FLASH . .
3


Accuracy of the ATCOR 2/3 Method *
The accuracy of the method depends on several factors : - radiometric calibration accuracy of the sensor (typically 3-10%) - radiative transfer code : relative accuracy of MODTR AN 4 better than 5 % in the atmospheric windo w regions - correct choice of atmospheric input parameters : up to user !!! - for near nadir view angles (off-nadir angle < 10 degree), a flat terrain, and avoiding the specular and backscattering regions, an accuracy of the retrieval of surface reflectance of +/-0.02 (reflectance < 0.10) and +/-0.04 (reflectance > 0.40) is possible. - in the thermal region, the surface temperature retrieval additionally depends on the appro priate surface emissivity map. If the deviation of the true surface emissivity to the assumed emissivity is less than 0.02, than the temperatures will be accurate to about 11.5 K.
* http://www.rese.ch/atcor/atcor3/atcor2_method.ht ml

4


:
1) ; 2) ; 3)
5


, ( , )*

* http://www.rese.ch/atcor/atcor3/atcor2_met hod.html

6


, ( )

I = B[T] = ISRF+IATM +IRFL+ISC
B -

T



T - , I ISRF - I I I
ATM RFL SCT

- - -
7


( IS

RF

)

ISRF=SB[TS]P, P = exp[-()],
P - -

- ( )
T
S- S-

( ) ( 0,96-0,99)
8


-

I(x,y); B[TS(x,y)] TS(x,y) = ? ICOR(x,y) = IATM+IRFL+ISCT P (x,y) B[TS] = ( I - IC
OR

) / (P S ); B[TS] TS(x,y)

:
- ( - ) - ( , ) -



S

- : , Z, 9


EOS/MODIS


-


' '

' '

:
,

:

' '



:

(0.66 , 0.86 , 2.1 ) (3.96 , 11 , 12 )

10


11
MOD04 MOD05 ( , 2003 ).


(466 ): = 0. 313 = 0.108 AOT= 0.036 - 0.749



12


14

(Path Radiance): 3 MODIS/Terra (=466 ); 28.07.2001, 05:50 GTM


15

: 31 MODIS/Te rra (=11 ); 28.07.2001, 05:50 GTM


16

;


17
MODIS/Terra: , 2001 .


18

' ' : MODIS/ Terra, , 200 1 .


NOAA POES
Scanex/ RAW

- ATOVS ( NOAA POES)
Calibration data HRP T minor frame NORAD_tle TB US L1B

HRPcon v

L1F

L1Fconv

AT OVS and AVHRR Pre-processing Package (AAPP)

L1C

19
L1D

,

The International AT OVS Processing Package (IAPP)

Top ography



Radiosonde da ta (SRX) ftp//ftp.ssec.wisc.edu/pub/ssec/halw/ Nu merical Mode l Data (GRIB) ftp//ftp.ssec.wisc.edu/pub/ssec/halw/grids/ Surface Data (META R) ftp//ftp.ssec.wisc.edu/pub/ssec/halw/surface/


20 ATOVS: NOAA- 18; 23.10.2006 .


21
RGB- ( 7,4,2) p177r015_7k20020601_z 38; - , .


22

- (1 2); 6- (10.3-12.4 ) E TM+/ Landsat-7 (Lo w gain).


MOD04: AOT (470 н м )
65. 0 64. 5

MOD05: Вл аго со держан и е, cм

,
64. 0 63. 5 43. 0
0.00 65.0 64.5 64.0 63.5

44 .0
0.05 0.10

45. 0
0.15 0.20

46 .0
0.25 0.30

47. 0
0.35

43. 0
0.55

44.0
0.65 0.75

45. 0
0.85 0.95

46. 0
1.05 1.15

47 .0
1.25

MOD04: Ко л -в о о бл ачн о сти , % MOD11: Изл учател ьн ая сп о со бн о сть

,

43 .0
0

44 .0
10

До л го та, гр ад
30 40 50 60

4 5. 0

46. 0
70

47. 0
80

43 .0
0.976

44 .0
0.978

До л го та, град
0.980 0.982 0.984

4 5.0

46.0
0.986

47 .0
0.988

,

MODIS At mosphere (Land) Products p177r015_7k2002 0601_ z38.

20

M D07: Вы со та п о в ерхн о сти , м O
6 5.0 6 4.5 6 4.0 6 3.5

220 170 120 70

4 3.0

4 4.0

До л го та, гр ад

4 5.0

4 6.0

47 .0
20

23


0. 5

1.5

2. 5

3.5

4. 5

5.5

2.0

3. 0

4. 0

5.0

6.0

24

( TS - T )


T TS,



T



T

S

TS - T
2.63 3.39 0 .1 2 0.46 5.76 0 .5 4 6.74 0 .4 6 5.76 0.53 6.69

- Low gain 2 8 7 .0 4 2 .1 8 2 9 0 .4 4

1 2

2 7 2 .8 3 2 8 8 .4 2 2 8 0 .1 4

2 9 8 .5 2 2 7 2 .9 5 3 0 4 .2 8 2.95 291.99

3.46 3.57 1 .9 8

3 0 1 .4 8 2 8 2 .1 2 3 0 8 .2 2

- High gain 2 8 7 .0 5 2.17 290.46

2.62 3.40 0 .2 0

1 2

2 7 3 .1 5 2 8 8 .4 3 2 8 0 .2 3

2 9 8 .7 9 2 7 3 .3 6 3 0 4 .5 3 2.94 291.99

3.44 3.57 2 .0 1

3 0 1 .2 6 2 8 2 .2 4 3 0 7 .9 4

- ; - .

25


. = 29 0. 5 = 1.6 0
E TM+/ La n ds a t 7

. = 28 9. 9 = 1. 65
MODIS /TE RRA

1

284

286

288

290

292

294

296

284

286

288

290

292

294

296

,

,

. = 29 2. 0 = 2. 71
ETM+ /Lan ds at 7

. = 291 .2 = 2 .7 0
MODIS /TERRA

2

284

286

288

290

292

294

296

298

284

286

288

290

292

294

296

298

,

,

26

, ETM+/Lansat-7 MODIS/Terra


!