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Welcome to the first of four tutorials for the Dawn Dusk Satellite Simulator (D2S2). In this tutorial, we will focus on navigating the D2S2 user interface and constructing a basic satellite. Throughout these tutorials, will use a conceptual satellite mission as a case study for practice and application.
SimSat is designed with the goal of demonstrating maritime vessel surveillance technology. Refer to Figure 1 for visual representations of the satellite, which has a 3U form factor and features an SSO +/-Y facing solar panel configuration, as well as an Imager. It is to be launched into a solar synchronous orbit (SSO) as a secondary payload on a launch vehicle. Its orbital altitude and inclination is to be 508km and 97.30 degrees, respectively. We shall use D2S2 to create and simulate the SimSat mission.
Figure 1: Two views of the SimSat: (Left) the nadir facing side of SimSat, showing the Imager, and (right) the zenith facing side of SimSat, showing the complete solar panel configuration.
The easiest method to create a satellite within D2S2 is through the satellite wizard. This tool guides the user through specifying the satellite's hardware components, simulation setup, and initial orbit states. By prompting the user to input essential details about the satellite and its orbit, the wizard ensures all necessary information is provided to run a simulation. To reach the wizard,
and select New Satellite Wizard from the drop-down menu (see Figure 2).
Figure 2: Screen capture corresponding to steps 1 and 2. Circled are the model view button (top right), Create button (top middle), as well as the satellite from the model simulation tree (bottom left).
The Satellite wizard now appears as a pop-up window, as shown below:
Figure 3: The Satellite wizard window.
Now, follow the prompts to create SimSat, such that the simulation matches the information given in the Introduction to case study: SimSat section.
Figure 4: Screen capture corresponding to steps 4 to 6.
When inspecting the simulation tree in the model view, we now see that SimSat has been added under satellites. Furthermore, each of the hardware components specified during the satellite wizard process is listed under Components (see Figure 5).
Figure 5: A screen capture showing the SimSat in the model tree, under Satellites.
If we choose to run the simulation now, the satellite will tumble. This is because the default attitude control mode of the ACS is NoControl. To fix this,
Figure 6: Screen capture corresponding to Steps 13 and 14.
at the top of the screen (not available in the demo version of D2S2).Congratulations! You have created and modified your first satellite using D2S2. In the next tutorial, you will add a ground station to the simulation.
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