Add albedo model

[200km]

Overview

Add a model to calculate the reflection of sunlight by the earth's albedo.

Details

To model the detailed behavior of sun sensors, it is necessary to calculate the solar reflection by the earth's albedo.
The information required is as follows:

• [ ] Intensity of reflected light
• [ ] Direction of reflected light

Conditions for close

When the albedo model is implemented.

Supplement

NA

Note

• Write a conclusion when closing the issue.