However, the spirit of celebrating the anniversary of the city of Semarang is still alive and well. One of them was carried out by the Semarang Local Amateur Radio Organization of the Republic of Indonesia (ORARI) through the artificial satellite IO-86 / LAPAN A2-ORARI satellite.
The local Semarang Amateur Radio Organization (ORARI) coordinates with the National Aeronautics and Space Agency (LAPAN) to broadcast happy birthday Semarang City and hashtag via digipeater APRS (Automatic Packet Reporting System) satellite IO-86 / satellite LAPAN A2-ORARI.
The LAPAN A2 / ORARI satellite is a microsatellite that was built on the basis of LAPAN's first satellite, Tubsat, which was launched in 2007.
Tubsat was manufactured in Germany while LAPAN A2 was made entirely in Indonesia using consultants from Germany.
The LAPAN A2 / ORARI satellite carries an Automatic Identification System (AIS) to identify ships in Indonesian waters, cameras to record video, and carry cargo for disaster mitigation / disaster management.
The contents are radio communication system for radio amateurs, VR (Voice Repeater) and APRS (Automatic Packet Reporting System) content.
"Happy 474th Anniversary of Semarang City #semarangsemakinhebat" was the message sent by the IO-86 satellite.
This was said by the Chairman of the Special Call Committee on the 474th anniversary of Semarang City, Arifin Santoso, Friday (30/4/2021).
Arifin explained that the APRS message "Happy 474th Anniversary of Semarang City #semarangsemakinhebat" can be received by all radio amateurs in the world who are covered by the equatorial orbit of the IO-86 satellite.
"This message can be received on the downlink frequency of 145.825mhz with a 1200bps AFSK decoder," explained the resident of Gajah Mungkur District.
In this mission, added Arifin, the IO-86 Satellite was scheduled for 8 orbits to continue broadcasting messages between 01 and 02 May 2021.
"Apart from that, radio amateurs in Indonesia also participated in celebrating this mission by sending the same message through the digipeater IO-86," concluded the Unissula lecturers who are also members of the Amateur Radio Satellite Indonesia Community. (*).
Reporter: M Hamidi
