6S用户手册

Second Simulation of a Satellite Signal

in the Solar Spectrum - Vector (6SV)

Vermote E.

(1,*)

, D. Tanré

(2)

, J. L. Deuzé

(1)

(2) Laboratoire d'Optique Atmosphérique, URA CNRS 713

Université des Sciences et Technologies de Lille

59655 Villeneuve d'Ascq Cédex, France

(3) European Centre for Medium Range Weather Forecast

Berkshire RG2 9AX, United Kingdom

1. Absorbing effects 10

2. Scattering effects 11

2.1. Case of a Lambertian uniform target 11

2.2. Environmental function 14

2.3. Intrinsic atmospheric reflectance 16

2.4. Airplane and elevated target simulations 18

2.5. Directional effect of the target 20

I. Description of the computer code 32

II. Examples of inputs and outputs 52

III. Description of the subroutines 56

referred to as 6SV), capable of accounting for radiation polarization. The manual presents a

modified version of the previous scalar 6S manual. For the user’s convenience, the format and

style of this new manual have been kept as close as possible to those of the previous version.

for the calculation of look-up tables in the MODIS (MODerate resolution Imaging Spectro-

radiometer) atmospheric correction algorithm. It enables accurate simulations of satellite and

through the calculation of four components of the Stokes vector, characterizing the intensity of

radiation, and perpendicular, parallel, and elliptical polarization. The accuracy of RT calculations

the “standard accuracy” conditions which provide the user with a relative average accuracy of

approximately 0.4-0.6%, compared to standard benchmarks and other RT codes.

Kotchenova, E.F. Vermote and P.A. Farris is submitted to Applied Optics in December, 2006.

3) 6SV is participating in the joint RT scalar/vector code comparison project, which the MODIS

atmospheric correction group performs together with the NASA Goddard Space Flight Center,

http://rtcodes.ltdri.org.

1. Scalar (ignoring the effects of polarization) 1. Vector (accounting for polarization)

2. Fixed number of scattering angles (83), used

for the specification of an aerosol phase

2. Ability to vary the number of scattering

angles (up to 1000)

aerosol profiles

developed by Dr. T. Miura, University of Hawaii at Manoa, Honolulu, USA.

July 1992 Development of the scalar 5S (Simulation of a Satellite Signal in the Solar

July 1997 Release of a new improved version of the 5S code, called 6S (Second

Simulation of a Satellite Signal in the Solar Spectrum). 6S becomes a basic RT

October 2005 Organization of a joint scalar/vector RT code comparison project together with