![]() ![]() You’ll find one such pass prediction tool on the AMSAT website. Various online programs allow you to follow the path of satellites, including the ISS. Here’s how to obtain one.Ĭommercial and public domain software is available to help track when the ISS will be in range of your station, and where to point your antenna. QSL cards are offered to confirm radio contacts with the ISS. Other call signs may come into use as the station and crew change. Packet Station Mailbox: RS0ISS-11 and RS0ISS-1 The following call signs are available for use on the ISS: Please do not transmit on the ISS downlink frequency. Earth stations can listen to the downlink frequency and transmit on the uplink frequency when the ISS is in range and crew members are on the air. The uplink is the earth station’s transmitting frequency. The downlink is the earth station’s receiving frequency. Most ARISS operations are split-frequency (each station uses separate receive and transmit frequencies). VHF/UHF Repeater Uplink: 145.99 (PL 67 Hz)įor a description of ITU regions, consult the ITU m ap. VHF Packet Uplink and Downlink: 145.825 (Worldwide) Voice Uplink: 145.20 for ITU Region 1 (Europe, Russia and Africa) Voice Uplink: 144.49 for ITU Regions 2 and 3 (The Americas, and the Pacific and Southern Asia) Voice and SSTV Downlink: 145.80 (Worldwide) The following frequencies are currently used for Amateur Radio ISS contacts (QSOs): Visit the the “Beginners” sections of the AMSAT-NA or AMSAT-UK websites for information on getting started with all modes of amateur radio satellite operation. But successful contacts have even been made with vertical and ground plane antennas. A circularly polarized crossed-Yagi antenna capable of being pointed in both azimuth (North-South-East-West) and elevation (degrees above the horizon) is desirable. It all depends on what equipment is in service in space.Ī typical ground station for contacting the ISS station includes a 2-meter FM transceiver and 25-100 watts of output power. Hams can also communicate with each other using the ISS packet (computer) radio mode, or receive slow scan television mode images. The crew can operate the 2-meter packet radio in unattended mode, and hams can make contacts with the ISS station when the crew members are working. (The current crew work schedule is published on the NASA website.) They’re usually free most of the weekend, as well. The most common times to find a crew member making casual periods are about one hour after waking and before sleeping, when they have personal time. The crew’s usual waking period is 0730 – 1930 UTC. The work schedules of the ISS crew dictate when they are able to operate the radios. ![]() Astronauts have contacted thousands of hams around the world. They can make radio contacts during their breaks, pre-sleep time and before and after mealtime. Some ISS crew members make random, unscheduled, amateur radio voice contacts with earth-bound radio amateurs, often called “hams”. ![]()
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