ARRL

Classroom Library: Satellite Communications

Bringing Space into the Classroom

Bringing space into the classroom is an incredibly powerful learning experience for students. The marriage between wireless technology literacy and space literacy is a strong one that produces a portfolio of activities that can engage virtually all students at some ability and interest level.

The portfolio of activities can range from simply having a satellite prediction software package running in the back of the classroom on an old, salvaged computer, a simple receiver to collect telemetry data from orbiting satellites, to a full-up ground station to communicate with other hams via satellites, or even with the astronauts in the International Space Station through the ARISS (Amateur Radio on the International Space Station)  program.


 

CSI Space: What's Going on With FUNCube?

FunCube_1_Model.jpg

 What does the data tell us?

 Join the investigation!

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New Resources for Classroom Instruction

For an overview of recent addtiions of classroom resources designed to help teachers instruct students about research projects to be launched by AMSAT on its Fox satellites, view a video of a presentation by Mark Spencer, WA8SME at the 2013 AMSAT Symposium. Details of these resources are provided below.

 

Resources

  • This library is a collection of resources designed  for teachers who want to explore satellite communications with students. There are also instructional resources designed for classroom exploration of satellite telemetry data used to understand satellite engineering and research deployed on satellites. The classroom resources are manipulatives that can prepare students to understand and utilize live telemetry data that can be captured from orbiting satellites.

     

    Copyright. ARRL ETP resources are intended for educational purposes. When used for this purpose, please acknowledge ARRL as the source. Additional permission is required to use this material in any training or product that will be redistributed or used for re-sale. Learn More

     

  • Space Technology in Your Classroom

    Here are some suggestions of ways to bring space into the classroom easily, effectively, and at little or no cost, and some illustrations of the standards and benchmarks are addressed.
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  • Satellite Antenna Rotor Simulator

    This article describes a satellite ground station antenna rotor simulator that you can use to demonstrate tracking a satellite as it traverses across the horizon during its travel in orbit.  Accessing satellites (including the International Space Station) is a content rich activity that can enhance the classroom instruction of numerous content areas.  This resource is intended to be part of the portfolio of space related activities that would be used to prepare for, and continue exploring space after, an ARISS contact (Amateur Radio in the International Space Station).

     

    Read the full article here

    See the BStamp code here

    See the PIC "C" code here

  • CubeSat Classroom Simulator

    The CubeSat Simulator provides a way to demonstrate satellite fundamentals in a controlled and predictable way, right in the classroom. Read about the design and classroom applications envisioned by developer, Mark Spencer WA8SME.

    Teachers who are interested in acquiring a CubeSat Simulator Kit for their classroom can apply to request one through an ARRL Education & Technology Program Progress Grant. When completing the grant application we will be looking for the following information and commitment:  

    (1)  The lead teacher will need to explain how he/she plans to use the CubeSat simulator in his/her classroom curriculum, and

    ( 2) The lead teacher must be willing to share some curriculum ideas she/he develops employing  the CubeSat to contribute to a library of shared resources that will be available to other teachers.

     Information about ARRL Education & Technology Program grants can be found at: www.arrl.org/ETP-grants

  • Study Satellite "Wobble" Using Telemetry Data

    The Attitude Determination Experiment Simulator is a classroom resource designed for use in 8th-16th grade classrooms to allow students to simulate the actual experiment being launched on the Fox 1A satellite. This is an attitude experiment based on a 3-axis, microelectro-mechanical gyroscope. The experiment data measures the performance of the satellite’s magnetic stabilization system. From experience gained with the simulator, students will be able to make the connection between the actual telemetry gyro data reported by the satellite on orbit to the rotational behavior of the satellite. If there is some unexplained data collected, it is hoped that the students could configure their simulator in such a way as to replicate the data and visualize the tilt, rotation rate, and wobble that is happening in space.    

     

     

     
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  • Managing Satellite Power: A Study in Maximum Power Point Tracking

    How can the power generated by solar panels on a satellite be managed and used most efficiently?   Use this classroom resource to engage students in a research project that attempts to answer this question. The Maximum Power Point Tracking (MPPT) system that will be deployed on the Fox 2 satellite is replicated in this classroom resource to enable students to simulate the experiment and the variables that will be studied by capturing telemetry data from the orbiting satellite. Students will be prepared to study and use live data when the experiment is launched.

     
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  • MAREA: Mars Lander Simulation

    MAREA is a Mars Lander/ Marine Amateur Radio Robotics Exploration Activity.

    The MAREA program is an  actvity that involves programming robots to respond to commands sent long distance by packet radio.  It employs a UHF radio tranceiver designed for local communication with the robot.  To simulate how space research is done, students can send commands to control robots via the ISS packet station.
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  • Using FUNcube to do Materials Science in the Classroom

    A Materials Science Experiment launched on the FUNcube Satellite developed by AMSAT-UK is designed so students can capture data transmitted from the satellite to exxamine how heat energy is radiated into space from materials with different surface finishes.

     

    A teachers guide developed by Mark Spencer with ARRL's Education & Technology Program explains the experiment, the data that is transmitted and how teachers can apply the data to laws of thermodynamics.  Included is a description of a Leslie's Cube experiment that can be conducted in the classroom to help students understand the concepts that can be explored with the data transmitted from space.

     

    This article provides an overview of the FUNcube experiment and the purpose of the Guide.

     

    Download the Guide

     

  • Studying Satellite Rotation

     

    The following videos  illustrate satellite rotation and provide instructions to make a classroom resource to demonstrate this rotation with students.     CubeSats are rotating about their Z-axis for thermal and gyroscopic stability. They also use fixed, permanent magnets installed in the satellites with the poles of the magnets aligned with the Z-axis. The magnets cause the Z-axis of the satellite to tend to align with the lines of the Earth’s magnetosphere to keep the satellite antennas properly oriented to facilitate communications with Earth bound satellite ground stations. This simple PowerPoint animation illustrates the Z-axis “flip”. Simply view the PPT to run the simulation.

    Flip animation:  Click here to view  

     

    A simple classroom manipulative made from cylinder magnets and a CD-ROM jewel case. The manipulative demonstrates the Z-axis flip maneuver in the classroom. This short video clip shows Z-axis flip manipulative in action and how it is made.   Manual Orientation demonstrator video:  Click here to view the video  

     

    With the CubeSats rotating about the Z-axis, they actually behave like a gyroscope.  One phenomena of the angular momentum of a spinning gyroscope is precession.  Precession is a reaction to a force that is applied perpendicular to the axis of rotation of a gyroscope.  These precession forces tend to counter act the applied forces to keep the gyroscope orientation stable.  When a CubeSat undergoes the flip maneuver, precession forces are applicable and could cause the cubesat to wobble about its Z-axis.  This short video shows what happens when forces are applied perpendicular to the spin axis of the gyroscope.  This might help visualize the forces experienced by a spinning CubeSat on-orbit.

    Gyroscope effect video:  Click here to view the video

Equipment

  • Resources for Satellite Operations

    In the interest of supporting teachers who want to bring space into the classroom by acitvely engageing students with amateur radio satelltie communications, the Education Technology Program has developed some equipment resources designed with utility to support ham radio satellite operation  for classroom use.

     

  • Satellite Tracker Interface

    The following articles describe how to build an interface and satellite tracking antenna. Related articles;

  • ISS Minimalist Antenna

    ETP Director, Mark Spencer, WA8SME developed a minimalist station antenna to monitor ISS packet activity in the event that someday the ISS has frequent SSTV activity, or might transmit some student experiment data down a 2 meter pipeline.  With this minimalist station a school should be able to set it up and let it run unattended, return and check for updated data as time and lesson activity permits.  
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  • ISS Minimalist Antenna, UHF Version

    When the ISS operates packet on UHF frequencies,  you will need to obtain an appropirate UHF antenna. This article describes a scaled version of the minimalist turn-style antenna that you might want to try.  One word of caution though, due to the physics of wave propagation, don’t expect to get the same results as when the system is operating on the 2-meter band, the reason is briefly described at the end of the article.
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  • Inexpensive Broadband Preamp for Satellite Work

    A preamp is important for quality satellite contacts. This article describes a preamp design that is inexpensive and makes the difference between hearing noise and establishing contact.    This pre-amp is available assembled and for purchase from the AMSAT store.

  • Inexpensive “WRAPS” Rotor for Satellite Work

      The  WRAPS (Wobbler RadFxSat Antenna Pointing System) rotator system is designed to support tracking the CubeSats.   It is a portable, battery operated satellite antenna rotator system that can be easily duplicated using commercial, off-the-shelf (COTS) parts, and by using simple hand tools with a minimum of machine work. This rotator system should be an affordable alternative to the industry standard that will help make setting up a ground station for schools.