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Sensing the World Around You

Radio Astronomers use the radio frequency portion of the Electromagnetic spectrum in their research. However, they are not the only ones that use this resource. Most people use this portion of the spectrum to send and receive information every day. For example, if you use wireless internet, make cell phone calls, send or receive text messages, or use a garage door opener, you are using radio frequencies. The previous sentence mentioned a few everyday uses of the radio frequency band, but the demand increases yearly. However, this portion of the spectrum is small, ranging from 1 to 3000 GHz. While it may be challenging to comprehend how small that is, it is easy to understand a limited resource with too many users. Imagine you are at the beach. If you arrive early in the morning, there aren't many other people. You can spread out your belongings and throw a football without bothering anyone else. As the day continues, it becomes more and more crowded. If it is an exceptionally lovely day, it can become so crowded that you can hardly move without bumping into someone. Your actions become severely limited due to the presence of other users. So it is with the radio frequency band. As new uses are developed, or existing services expand, the less each user can do without being impacted by the actions of others. Therefore, the radio frequency band of the EM spectrum is a limited resource that must be managed wisely for the benefit of all.

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There is an opportunity for you to be a scientist. To manage the spectrum so that everyone benefits, we must first understand the geographic locations and times of day when the radio frequency band is being used. To collect data about the radio frequencies you need an RTL-SDR dongle like the one shown to the right. Below are links for two guides that will help you participate in this project. The first is a technical guide that describes the hardware and software you will need to take part in the project. The second is an activity guide that will help you collect the necessary data.
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You can download the technical guide by clicking on the button below: 

DOWNLOAD TECHNICAL GUIDE

You can download the technical guide by clicking on the button below: 

DOWNLOAD ACTIVITY GUIDE


This is a citizen science project. Citizens are responsible for collecting the data, but they are also responsible for determining how the project expands. This project uses an RTL-SDR dongle to receive radio frequencies. The activity guide contains a couple of ways to use this device, but there are many more. If you enjoy using the dongle, explore what else you can do with it. If you find an activity that you enjoy and fits the parameters of this project, please fill out the form below. Your activity may be in the next edition of the activity guide.

Suggest an activity by clicking on the button below:

SUGGEST AN ACTIVITY


Image courtesy of Freepik.com (https://www.freepik.com/free-vector/science-electromagnetic-spectrum-diagram_15662378.htm#query=electromagnetic%20spectrum&position=1&from_view=search