VMware下Ubuntu18.04安装教程：SCIATRAN软件包部署与设置

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本篇文档是关于SCIATRAN软件包的用户指南，版本为3.8，发布日期为2018年2月9日，由德国不来梅大学遥感研究所编写。SCIATRAN是一个辐射传输模型和反演算法的软件，适用于处理多种地球物理问题，如光谱模拟、大气散射分析等。该用户手册详细介绍了在VMware虚拟机环境下安装Ubuntu 18.04的操作步骤，包括系统需求、库文件安装、软件安装、控制文件配置以及特定功能的使用方法。 **1. 安装环境与准备** - **兼容性：**用户指南提到支持的计算机系统，并建议确保所使用的系统符合软件的要求。 - **软件需求：**文档强调了安装过程中需要LAPACK和BLAS库，这两个库对于数值计算至关重要，通常用于矩阵运算和向量化处理。 - **系统环境设置：**指南还涉及到了如何配置GALAHAD Quadratic Programming Library，这是一个优化工具，可能用于模型中的某些复杂计算。 **2. SCIATRAN安装流程** - **安装步骤：**详述了从下载源代码到编译并安装SCIATRAN的具体过程，包括必要的配置和依赖项安装。 - **控制文件：**介绍如何创建和配置控制文件，这是执行辐射传输模拟时的重要配置文件，决定了模型参数和运行设置。 **3. 辐射传输模型应用** - **功能概述：**指南列举了SCIATRAN可以计算的多个辐射传输相关量，如强度、斯托克斯矢量、光通量、球面反照率、大气散射因子、垂直光学深度和权重函数等。 - **特定功能详解：**例如，"ram"标签可能涉及到大气中旋转拉曼散射的处理，这在研究大气成分和气候变化时是关键的。 **总结与注意事项** 阅读这份用户指南有助于在VMware虚拟机上搭建一个适合进行辐射传输模型研究的环境，并了解如何利用SCIATRAN软件进行精确的辐射传输计算和数据处理。遇到任何安装或使用过程中的问题，都应参考此文档的详细步骤，或者寻求作者提供的技术支持。

• The program performs calculation of test scenarios A2 - A6 and B1 - B4 which are

described in (Emde et al., 2015).

If the calculation of the corresponding test is ﬁnished successfully, on the screen user can

see the following information

Perform test A4

---------------

Comparison results of test A4 - Spheroidal aerosol particles:

SCIATRAN IPOL PSTAR V-3.5.9

I 0.0760 0.0880 0.0250 0.0760

Q 0.0284 0.0280 0.0280 0.0284

U 0.0342 0.0340 0.0350 0.0342

V 1.2772 1.2770 1.2780 1.2772

***** Comparison is successful *****

Output results consist of ﬁve columns:

• ﬁrst column is the identiﬁcation of the Stokes vector component;

• second column contains comparison of the current SCIATRAN version and MYSTIC

MC code;

• third and fourth columns show results of IPOL and PSTAR codes comparisons with

MYSTIC MC code as given in Table 3 (tests A2-A6) and Table 4 (tests B1-B4) by

Emde et al. (2015);

• ﬁfth column contains results for SCIATRAN version v3.5.9, which is considered as

reference.

The ***** Comparison is successful ***** message is obtained if the maximal rel-

ative diﬀerence between current results and results for the 3.5.9 version is smaller than

0.1%.

Note that in order to quantify the level of agreement between the models we calculate the

relative root mean square diﬀerences ∆ between MYSTIC and other codes for the full radiation

ﬁeld including all up- and down-looking directions. This yields one representative number for

each test case. We deﬁne ∆

for I as follows:

∆

i=1

MY ST IC

− I

)

i=1

MY ST IC

)

. (2.1)

Here m denotes the radiative transfer model and the summation is done over all N directions,

for which the radiation ﬁeld was calculated. For other Stokes components ∆ is calculated

accordingly.

Attention:

• Depending on the computer platform the calculation of all tests may take a few tens of

minutes.

• Note that tests based on the IPRT inter-comparison project enable the plane-parallel

approximation of the SCIATRAN code to be checked only. The user must be careful

when using other options.

2.9 How to check SCIATRAN (spherical geometry)

Appropriate control ﬁle: “control.inp”

Relevant control parameters: “Home directory”

In the previous section we described how to check instalation of source code in the case

of plane-parallel geometry. Here we suggest an additional tests to check the instalation of

SCIATRAN in the case of spherical geometry. To do this we have pre-calculated Stokes vector

components of the reﬂected and transmitted radiation at the top and bottom of atmosphere,

respectively, at the wavelength 500 nm. The calculations were performed for zenith angles

◦

, 20

◦

, 30

◦

, 40

◦

, 50

◦

, 60

◦

, 70

◦

, 80

◦

, azimuthal angles 30

◦

, 60

◦

, 90

◦

, and solar zenith angle

was set to 50

◦

. We have selected three scenario:

- Rayleigh atmosphere (“SPH R”),

- Rayleigh and aerosol atmosphere (“SPH RA”),

- Rayleigh and aeroso atmosphere including a water cloud (“SPH RAC”).

In addition to these scattering processes we included gaseous absorption by O

and NO

and reﬂection of radiation on the Lambertian surface with albedo 0.3. The results obtained

using the SCIATRAN version 3.8.4 were saved and will be called throughout this section as

reference.

To perform test calculations please follow the instructions:

• Set in the “Home directory” control line of the control.inp ﬁle the path to directory

“SCIATRAN”;

• Change directory to “SPHER TEST”;

• Start the shell-script ﬁle “all tests.sh” as follows:

”./all tests.sh par1 par2 ”

where parameters ”par1” and ”par2” are the path to the directory containing executable,

e.g., “../Execute 3.8” , and the name of appropriate executable ”SCIA {COMPUTER

SYSTEM}.exe”, respectively;

• The program performs calculation of test scenarios SPH R, SPH RA, and SPH RAC. If

the calculation of the corresponding test is ﬁnished successfully, on the screen user can

see the following information (example is given for test SPH RAC):

Perform test SPH-RAC

--------------------

Comparison results of test SPH_RAC -

Rayleigh, aerosol and cloud scattering above Lambertian surface

Reference Current Rel.max Rel.mean

I 0.3714554E-01 0.3714554E-01 0.0000 0.0000

Q 0.8862606E-04 0.8862606E-04 0.0000 0.0000

U 0.5032893E-04 0.5032893E-04 0.0000 0.0000

V 0.5493627E-06 0.5493627E-06 0.0000 0.0000

***** Comparison is successful *****

Output results consist of ﬁve columns:

• ﬁrst column is the identiﬁcation of the Stokes vector components;

• second column contains minimal value of Stokes components for all viewing geome-

tries of the reference SCIATRAN version;

• third column contains minimal value of Stokes components for all viewing geometries

Setting “RTM Mode” parameter to “ﬂux” the following ﬂuxes at each altitude level are

calculated:

• actinic ﬂux ;

• upwelling and downwelling diﬀuse ﬂuxes ;

• upwelling diﬀuse scalar ﬂux ;

• upwelling and downwelling total ﬂuxes;

• direct solar radiance.

The output units are controlled by “Extra-terrestrial solar ﬂux” parameter (see Section 3.2).

The ﬂuxes and the direct solar radiance are calculated at all altitude levels deﬁned by the

standard altitude grid (see Section 3.3) and all solar zenith angles speciﬁed in “Solar zenith

angles” control line (see Section 3.8.1) and written out in the altitude region as speciﬁed by

“Lower and upper boundary of ﬂux results” parameter (lower and upper altitude in km must

be speciﬁed in the “control out.inp” input ﬁle).

Attention:

• Settings of other geometrical parameters discussed in Section 3.8, such as viewing and

azimuth angles as well as user deﬁned output altitude, have no eﬀect.

• If “Extra-terrestrial solar ﬂux” parameter is set to “t”, solar irradiance is written out as

well.

Limitation:

• No ﬂuxes can be calculated in solar/lunar occultation mode (parameter “RTM TYPE”

set to “transmission”) .

3.1.3 Spherical albedo, diﬀuse transmission (“spher alb”)

Relevant control parameters: “Lower and upper boundary of ﬂux results”, “RTM Mode”,

“RTM TYPE”, “RTM-CORE” .

Setting “RTM Mode” parameter to “spher alb” the spherical albedo and diﬀuse transmission

are calculated.

The spherical albedo and diﬀuse transmission are calculated at all altitude levels deﬁned by

the standard altitude grid (see Section 3.3) and written out in the altitude region as speciﬁed

by “Lower and upper boundary of ﬂux results” parameter (lower and upper altitude in km

must be speciﬁed in the “control out.inp” input ﬁle).

Attention:

• The only relevant parameter for this mode (except of the wavelength range) is the num-

ber of solar zenith angles which is used by the program to perform integration of the

intensity over the solar zenith angles. The choice of the solar zenith angles grid is done

automatically (Gaussian nodes) but the number of angles should be deﬁned by the user

(see “Solar zenith angles” control parameter in the “control geom.inp” input ﬁle).

Settings of other geometrical parameters discussed in Section 3.8, such as solar zenith

angles, viewing and azimuth angles as well as user deﬁned output altitude, have no eﬀect.

Limitation:

• the spherical albedo and diﬀuse transmission can only be calculated for a plane-parallel

atmosphere (“RTM TYPE” control parameter is set to “pp scat”) in the discrete ordi-

nate mode (“RTM-CORE” control parameter is set to “DOM S” or “DOM V”).

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