Consists of the following classes.
-
class Satellite. A class for satellites in general.
-
class CubeSat(Satellite). A subclass of Satellite for CubeSat.
- class ImpairedCubeSat(CubeSat). A subclass of CubeSat for a CubeSat that can't rotate and move directionally at the same time.
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class Target(Satellite). A subclass of Satellite for the Target.
-
-
class Sim. The simulation infrastructure.
sudo apt-get update
Enable interfaces
sudo raspi-config
Enable Interface options VNC, I2C, SPI, Serial, etc.
(Optional) Install Remote Desktop
apt-get install xrdp
We also want to install some CircuitPython Adafruit libraries, since we're gonna use a lot of sensors from Adafruit, because they make their own drivers for them. Follow the instructions here: https://learn.adafruit.com/circuitpython-on-raspberrypi-linux/installing-circuitpython-on-raspberry-pi
Each data array is produced by the simulation by sampling the given variable at specific times and appending them to the save array. For example, position is three-dimensional (x, y, z) and so at each time t is described by a list of length 3. If the simulation samples each variable 1876 times, the final position array will be (3 x 1876), describing the 3D position at each sampled time.
| Variable | Description | Dimensions | Units |
|---|---|---|---|
Time |
The time at each sample, eg. [0.00, 0.04, 0.08, ..., 75.00] |
1 | seconds |
Pos |
The position, where (0, 0, 0) is the starting point on the Earth below the satellite | 3 (x, y, z) | metre |
Vel |
The velocity in each 3D direction | 3 (xdot, ydot, zdot) | metre/sec |
Att |
The attitude (or orientation) around each 3D axis | 3 (roll, pitch, yaw) | radian |
AngVel |
The angular velocity around each 3D axis | 3 (roll vel, pitch vel, yaw vel) | radian/sec |
Inputs |
The attitude commands around each 3D axis, i.e. the satellite should rotate so that the attitude matches these values. | 3 (roll, pitch, yaw) | radian |
Target pos |
The point on the ground which any of the shown beams are intersecting, i.e. the target. | 3 (x, y, z) | metre |
ADCS mode |
The number describing the current mode of the guidance system, where the modes have names given in ADCS mode names. |
1 | - |
Payload mode |
The number describing the current mode of the payload, where the modes have names given in Payload mode names. The payload mode affects what beams are active within the simulation. |
1 | - |
Payload temp |
The temperature of the payload. | 1 | deg C |
Energy |
The energy level of the satellite. | 1 | Joules |
These variables are produced by the simulation as it runs but otherwise do not change with time.
| Property | Description | Units |
|---|---|---|
Time step |
The change in time between simulation step. | sec |
Target info |
Dictionary describing the position and visibility of each target receiver. | - |
ADCS mode names |
The names of each guidance system mode, where the index of the tuple is used to relate the name to the modes described by the ADCS mode array. |
- |
Payload mode names |
The names of each payload mode, where the index of the tuple is used to relate the name to the modes described by the Payload mode array. |
- |
| Key | Description |
|---|---|
Sat |
Satellite properties, such as mass, geometry, altitude. |
Camera |
Properties of one or more onboard cameras, such as position on sat body, resolution, pitch angle, field of view. Each camera has its own dictionary. |
Earth |
Earth properties, such as mass, radius and the resolution (m/px) of the full-size texture image. |
Universal |
Universal properties describing the laws of physics |
Imagery |
Info on textures used in simulation and visualisation |
Laser |
Positions of each laser emitter on the satellite body |