| About compiling and executing |
| Q. I cannot get results correspoinding to the model output. |
| A. Please check you compiled 'rstar4b-ps.f' or 'rstar5b-ps.f'.
'rstar4b.f' or 'rstar5b.f' is insufficient file (parameters has not been justified). |
| About input parameters in 'data' file |
| Q. How do I set the user setting parameter "C0" in 'data' file ? |
| A. The most user will set C0 as 1.0. |
| Q. Can I set two or more channels (bands) ? |
| A. Yes, the user setting parameter "NWL" in 'data' file is the number of channels (bands). |
| Q. How to define responce function for each channel (band) ? |
| A. User can define response function by user setting parameters of "NW0", "RX", "RF" and "DW" in 'data' file.
The each sub-channel wavelength WL1(I) is calculated by WL1(I)=WL+DW*RX(I) |
| Q. How to simulate radiance from ice particles? |
| A. The user setting parameter "ISPC" in 'data' file should be 2. However, this is a SPHERICAL ice particles. If the user is expecting to account non-sphericity in simulation. The user have to prepare particle scattering kernel file of your particles correspoinding to "KRNL.OUT" file. "KRNL.OUT" file was calculated by assuming SPHERICAL particles. User can set water, ice, and some kinds of aerosols summarized below but the particle should be SPHERICAL.
C ISPC I SPECIES OF PARTICULATES C 1: WATER, 2: ICE, 3: DUST-LIKE, 4: WATER-SOLUBLE C 5: OCEANIC, 6: SOOT, 7: VOLCANIC-ASH, 8: 75%H2SO4 |
| About coutput parameters in 'out' file |
| Q. What's the output parameter "RF" in rstar4b? |
| A. "RF" is equivalent reflectance defined by RF=pi*L/F/mu where, pi=3.1415965...., L is simulated radiance, F is solar irradiance (response weighted), and mu is cosine of solar zenith angle. |
| Q. What's the output parameter "S0" It seemed too large if it is solar flux? |
| A. This value has not been normalized by equivalent width. If you modify the source code as follow, you will get the familiar values.
26 WRITE(IUO,15) WL1,TH0(J),TH(I),FI(K),SOL/wg0,EN1,RD1,RFF,TBB1 |
| Q. What output parameter in 'out' file is simulated TOA radiance? |
| A. (for rstar4b) The column of "EN" or "RD" is a TOA radiance (W/m2/sr/um). (for rstar5b) 1 5.889E+01 6.869E+01 These are TOA radiances. |
| Q. How to setup cloud field in rstar6b? |
| A. Please set both "data" and "MLATMD". Please download pdf file for more details. |
| General |
| Q. What's ocean surface model was applied in the rstar? |
| Nakajima and Tanaka (1983) model with Cox and Munk statistics wave. Reference:Nakajima, T., and M. Tanaka, 1983: Effect of wind-generated waves on the transfer of solar radiation in the atmosphere-ocean system. J. Quant.Spectrosc. Radiat. Transfer, 29, 521-537. |