GranaSAT Summer Camp

1st week meeting

Raspberry team:

Álvaro Díaz Carmona dcarmona97@outlook.comEloy Prieto Panadero eloyprietopanadero@gmail.com

RASPBERRY’S TEAM GOAL

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MathCAD

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Magnetic field generated by an infinite wire

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Magnetic field generated by an infinite sheet(Particular case)

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Magnetic field generated by an infinite sheetin any point

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sin(x)=cos(90-x)cos(x)=-sin(90-x)

Magnetic field contour

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References

1. http://birdonacake.blogspot.com/2012/07/raspberry-cake-with-dark-chocolate.html

2. https://granasat.ugr.es

3. https://es.slideshare.net/fpinela

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GranaSAT Summer Camp

2nd week meeting

Raspberry team:

Álvaro Díaz Carmona dcarmona97@outlook.comEloy Prieto Panadero eloyprietopanadero@gmail.com

Reminder of the last week• The last week; we used Mathcad to calculated the magnetic field of a

sheet

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Mathcad• This week; we calculated the magnetic moment of a sheet

3Figure 11: Magnetic moment of a magnet

BLENDER

• Blender is a program where we can design a satellite and put all of its components

4Figure 12: Satellite Sample Design

UV PROJECTION AND TEXTURES

5Figure 13: Projection and textures design of the satellite

System Tool Kit (STK)

• STK is a program where we can upload all of satellite designs add sensors put them orbiting the earth an also we can simulate all the energy take by the solar panels and the orbit that it will do

6Figure 14: Satellite model in STK

Our satellite models

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The next week: Mathcad

• We are going to study the validity of the model

8Figure 16: Magnetic field comparative graphic between a magnetic sheet and a magnetic coil

The next week: STK

• We are going to orientate solar panels of the satellite to the Sun

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References

1. Manual Blender: https://www.blender.org/

2. STK: https://www.agi.com/products/engineering-tools

3. Granasat: https://granasat.ugr.es

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GranaSAT Summer Camp

3rd week meeting

Raspberry team:

Álvaro Díaz Carmona dcarmona97@outlook.comEloy Prieto Panadero eloyprietopanadero@gmail.com

Last week recap

• MathCAD: Calculation of magnetic momentum through dipole aproximation

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CASE 1: B on the same axis as m CASE 2: B parallel to m

Last week recap• STK: installation and first steps

3STK running example

Sun-synchronous orbit

• Inclination around 90 degrees

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Dawn-dusk orbit

• Satellite always receives sunlight

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Archievements: Dawn-Dusk orbit for one day

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Archievements: Constant irradiance received

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Detected issues• Troublesome orbit for a long span of time.

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Next week purposes

• Including orbit precession

• Synchronising precession with Earth’s revolution around the Sun

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Unsuitable satellite solar energy income

References

• https://en.wikipedia.org/wiki/Sun-synchronous_orbit

• https://crisp.nus.edu.sg/~research/tutorial/spacebrn.htm

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GranaSAT Summer Camp

4th week meeting

Raspberry team:

Álvaro Díaz Carmona dcarmona97@outlook.comEloy Prieto Panadero eloyprietopanadero@gmail.com

Index

1. MathCAD

2. Blender

3. STK

4. MATLAB

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MathCAD

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B.test B.test

Magnetic field of a wire and magnetic field of a sheet

MathCAD

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𝑚 𝐴𝑚2 = 5 · 𝐵 𝜇𝑇 · (𝑟 𝑚 )3 𝑚 𝐴𝑚2 = 10 · 𝐵 𝜇𝑇 · (𝑟 𝑚 )3

𝑚[𝐴𝑚2] = 𝐼[𝐴] · 𝑆[𝑚2]

Two different ways of measuring magnetic momentum (m) through magnetic field (B)

Blender

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Expected axis orientation for a satellite

XY

Z

Cubesat1U Blender model

STK

• Manual Dawn-Dusk orbit generation

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Satellite riding the terminator: expectations vs reality

STK

Orbit rotation around the Earth’s axis7

Terminator changes during the year

MATLAB

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Receiving real time data from satellite

MATLAB

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Real-time changes on the attitude

Two Line Element files (TLE)

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TLE example and a list of all the data it is stored

MATLAB

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Download TLE

Extract TLE data

Input TLE data

Propagate

Steps needed to propagate a satellite

ConstrainSatelliteYPR.mExtractTLE.m

NORAD

References

• https://en.wikipedia.org/wiki/Sun-synchronous_orbit

• https://astrobob.areavoices.com/2013/12/20/winter-solstice-offers-hope-in-our-darkest-hour/

• https://crisp.nus.edu.sg/~research/tutorial/spacebrn.htm

• https://slideplayer.com/slide/10372861/#

• https://en.wikipedia.org/wiki/Two-line_element_set

• http://help.agi.com/stk/index.htm#install/MATLABsetup.htm

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