
Amateur Radio and the International Space Station: Making Contact
02/09/2023Introduction
What is Amateur Radio?
Amateur radio, also known as ham radio, is a popular hobby that allows individuals to communicate with others around the world using radio waves. It involves the use of specialized equipment and techniques to transmit and receive signals. Amateur radio operators, known as hams, have the opportunity to connect with people from different cultures and backgrounds, making it a truly international community. The International Space Station (ISS) plays a significant role in amateur radio, as it provides a unique platform for hams to communicate with astronauts orbiting the Earth. This exciting aspect of amateur radio allows enthusiasts to make direct contact with astronauts and even participate in scheduled contacts where they can ask questions and receive responses in real-time. Amateur radio not only provides a means of communication but also fosters a sense of curiosity, exploration, and camaraderie among its participants.
What is the International Space Station?
The International Space Station (ISS) is a habitable space station that serves as a laboratory for scientific research and international cooperation. It is a joint project between NASA, Roscosmos, ESA, JAXA, and CSA, representing the United States, Russia, Europe, Japan, and Canada respectively. The ISS orbits the Earth at an altitude of approximately 408 kilometers and travels at a speed of about 28,000 kilometers per hour. It provides a unique platform for conducting experiments in microgravity, studying the effects of long-duration space missions on the human body, and testing technologies for future space exploration. The ISS also serves as a base for astronauts to live and work in space, conducting research, maintaining the station, and participating in spacewalks. It has been continuously occupied since November 2000 and has hosted astronauts from various countries, contributing to international collaboration and advancing our understanding of space.

A mesmerizing moment of the graceful flight of the ISS over the breathtaking beauty of planet Earth, which reminds us of humanity’s relentless pursuit of space exploration.
Importance of Making Contact
Making contact with the International Space Station (ISS) through amateur radio is a truly remarkable feat. It not only allows amateur radio operators to communicate with astronauts in space, but it also fosters a sense of curiosity and wonder about the world beyond our own. This unique opportunity provides a platform for learning and exploration, inspiring individuals of all ages to pursue their interest in science, technology, engineering, and mathematics (STEM). By making contact with the ISS, we are not only connecting with the advancements in space exploration but also encouraging the next generation to reach for the stars.
History of Amateur Radio in Space
Early Experiments
Early experiments in amateur radio communication with the International Space Station (ISS) began in the late 1990s. These early endeavors aimed to establish a direct link between amateur radio operators on Earth and astronauts aboard the ISS. Through various trials and tests, the amateur radio community successfully made contact with the ISS, marking a significant milestone in the history of space communication. These early experiments paved the way for further advancements and collaborations between amateur radio enthusiasts and space agencies, fostering a strong bond between the two communities.
ARISS Program
The ARISS Program, or Amateur Radio on the International Space Station, is a cooperative venture between NASA, the American Radio Relay League (ARRL), and other international space agencies. It provides an opportunity for students, teachers, and the general public to experience the excitement of amateur radio communication while learning about space exploration and technology. Through the ARISS Program, licensed amateur radio operators have the unique opportunity to make direct contact with astronauts aboard the International Space Station, allowing for real-time conversations and exchanges of information. This program not only fosters interest in amateur radio and space science but also helps inspire the next generation of scientists, engineers, and astronauts.
Notable Contacts
Notable Contacts paragraph content
Amateur Radio Equipment on the ISS
Transceivers
Transceivers play a crucial role in amateur radio communication with the International Space Station (ISS). These devices serve as the primary means of transmitting and receiving signals between Earth-based amateur radio operators and astronauts aboard the ISS. Transceivers are designed to operate in the frequency bands allocated for amateur radio use and are equipped with features that enable reliable communication over long distances. The use of transceivers allows amateur radio enthusiasts to connect with the ISS and engage in two-way communication, exchanging messages, greetings, and even conducting experiments. The advancements in transceiver technology have made it easier than ever for amateur radio operators to establish contact with the International Space Station and participate in the exciting world of space communication.
Antennas
Antennas play a crucial role in enabling communication between amateur radio operators and the International Space Station (ISS). These specialized devices are designed to transmit and receive radio signals, allowing astronauts on the ISS to establish contact with amateur radio enthusiasts on Earth. The antennas used for this purpose are highly sophisticated, with advanced technologies that ensure optimal signal transmission and reception. They are carefully positioned and calibrated to overcome the challenges of space-based communication, such as signal interference and atmospheric conditions. The use of high-gain antennas allows for long-range communication, enabling amateur radio operators to connect with the ISS even from distant locations. Antennas are an essential component of the amateur radio system, facilitating the exchange of information and fostering the spirit of exploration and collaboration between space enthusiasts and astronauts aboard the International Space Station.
Power Supply
The power supply is a crucial component for successful communication between amateur radio operators and the International Space Station (ISS). As the ISS orbits the Earth at a speed of approximately 28,000 kilometers per hour, it requires a reliable and efficient power source to support its communication systems. The power supply on the ISS is a complex system that includes solar arrays, batteries, and power management units. The solar arrays harness the energy from the sun and convert it into electricity, which is stored in the batteries for use during periods when the ISS is not in direct sunlight. The power management units regulate and distribute the electrical power to the various systems on the ISS, including the amateur radio equipment. A stable and uninterrupted power supply is essential for maintaining communication with the ISS and ensuring the success of amateur radio operations.

Captivating scene of an astronaut aboard the International Space Station doing radio communications bridging the gap between Earth and outer space.
Making Contact with the ISS
Amateur Radio Frequencies
Amateur radio frequencies are a crucial component of communication between amateur radio operators and the International Space Station (ISS). These frequencies, also known as bands, are allocated specifically for amateur radio use and are regulated by international agreements. The ISS operates on several amateur radio bands, including the VHF (Very High Frequency) and UHF (Ultra High Frequency) bands. These bands allow amateur radio operators to establish contact with the astronauts on board the ISS and exchange messages, images, and even video. Amateur radio enthusiasts around the world eagerly listen for signals from the ISS and strive to make contact, making it a truly exciting and unique experience in the world of amateur radio.
Operating Modes
Amateur radio operators have the opportunity to communicate with astronauts on board the International Space Station (ISS) through various operating modes. One of the most popular modes is voice communication, where operators can have real-time conversations with astronauts using handheld radios or dedicated ground stations. Another mode is packet radio, which allows for the exchange of digital messages and data between the ISS and ground stations. Additionally, amateur radio operators can also make contact with the ISS through the use of slow-scan television (SSTV), where images are transmitted and received in a similar way to traditional television. These operating modes provide a unique and exciting opportunity for amateur radio enthusiasts to connect with astronauts in space and experience the thrill of communicating with the ISS.
Contact Procedures
Contact procedures for amateur radio operators to communicate with the International Space Station (ISS) are well-established and regulated. Before attempting to make contact, operators must obtain the necessary licenses and certifications. They must also follow specific frequency and timing guidelines provided by the ISS. During a contact, operators must adhere to proper etiquette and protocols, including identifying themselves and their location. Communication with the ISS provides a unique and exciting opportunity for amateur radio operators to connect with astronauts in space and participate in scientific experiments.

A group of enthusiastic 7th grade students can be seen eagerly engaging with ARISSat-1, the amateur radio satellite, as they explore the wonders of space communication and cultivate their curiosity for STEM education.
Benefits of Amateur Radio and ISS Contact
Educational Opportunities
There are numerous educational opportunities available through amateur radio and the International Space Station (ISS) program. Students can participate in the ARISS (Amateur Radio on the International Space Station) program, which allows them to communicate with astronauts on the ISS using amateur radio equipment. This hands-on experience not only teaches students about the principles of radio communication and space exploration but also fosters an interest in STEM (Science, Technology, Engineering, and Mathematics) subjects. Additionally, schools and educational institutions can collaborate with amateur radio operators to set up satellite ground stations and conduct experiments related to space science and telecommunications. These opportunities provide students with a unique and engaging way to learn about space, technology, and communication.
Promoting STEM
Promoting STEM (Science, Technology, Engineering, and Mathematics) is crucial for the development of future generations. Amateur radio and the International Space Station provide a unique platform to inspire and engage students in these fields. By allowing students to communicate directly with astronauts in space, amateur radio fosters a sense of curiosity and excitement about science and technology. This hands-on experience not only encourages students to pursue careers in STEM but also helps them develop important skills such as problem-solving, critical thinking, and teamwork. The combination of amateur radio and the International Space Station creates an unparalleled opportunity to promote STEM education and inspire the next generation of scientists and engineers.
International Cooperation
International cooperation plays a crucial role in the field of amateur radio and the International Space Station (ISS). With the goal of making contact between amateur radio operators on Earth and astronauts aboard the ISS, collaboration between various countries is essential. The ISS serves as a platform for fostering international partnerships and promoting scientific and technological advancements. By working together, countries can share resources, knowledge, and expertise, enabling the amateur radio community to connect with astronauts in space and further expand our understanding of radio communication and space exploration.
Conclusion
Impact of Amateur Radio on ISS Missions
The impact of amateur radio on ISS missions is significant. It provides a unique opportunity for communication between astronauts and the general public. Amateur radio operators from around the world can make contact with the International Space Station, allowing them to ask questions, exchange greetings, and even participate in educational activities. This interaction not only fosters a sense of global community but also promotes interest in space exploration and STEM fields. Moreover, amateur radio serves as a backup communication system in case of emergencies, ensuring a reliable means of communication between the ISS and mission control. Overall, the inclusion of amateur radio on ISS missions enhances public engagement, inspires future generations of space enthusiasts, and contributes to the success of space exploration endeavors.
Future Developments
In terms of future developments, there are several exciting prospects for amateur radio and the International Space Station. One of the most anticipated advancements is the implementation of high-speed digital communication capabilities, which would greatly enhance the data transmission capabilities between the station and amateur radio operators on Earth. This would enable faster and more efficient exchange of information, allowing for more sophisticated experiments and collaborations. Additionally, there are ongoing efforts to expand the range of frequencies available for amateur radio use on the ISS, which would further broaden the opportunities for communication and experimentation. With these future developments, the collaboration between amateur radio enthusiasts and the International Space Station is expected to reach new heights, fostering innovation and exploration in the field of space communications.
Inspiring the Next Generation
The International Space Station (ISS) and amateur radio have come together to inspire the next generation of space enthusiasts. Through the Amateur Radio on the International Space Station (ARISS) program, students around the world have the opportunity to communicate with astronauts on board the ISS. This unique experience allows students to ask questions, learn about life on the ISS, and gain a deeper understanding of space exploration. By connecting with astronauts in real-time, young minds are ignited with curiosity and a passion for science, technology, engineering, and mathematics (STEM). The interaction between amateur radio and the ISS not only fosters educational opportunities but also encourages young people to pursue careers in space-related fields. As a result, the partnership between amateur radio and the International Space Station is playing a vital role in inspiring the next generation of space explorers.