APRS
APRS eller Automatic Position Reporting System er et radioamatørsystem til automatisk positionsbestemmelse af amatørradiostationer. Systemet benytter packet radio til at udsende aprs-pakkerne.[1]
Det blev udviklet af Bob Bruninga (United States Naval Academy), med amatør kaldesignalet WB4APR, mellem ca. 1984-1990.
Aprs er også designet til, at man kan bestemme, hvilken retning en (APRS-)station er i.[2] Fx kan det anvendes til at rette en radioantenne ind i den ønskede retning, så det er lettere at kontakte radioamatører fra nær og fjern.
Kilder
- ^ APRS protocol reference APRS101.pdf
- ^ usna.navy.mil: APRS Direction Finding Citat: "...One of the most useful tactical local tools of APRS is Signal location and Direction finding. Since APRS can locate signal sources based simply on SIGNAL strength, it is far superior than other DF techniques (for instant come-as-you-are use) because everyone can give data, not just the 1% with DF equipment. *And*, EVERYONE with a radio even if they hear NO SIGNAL is contributing VALUABLE info that can be used to rapidly build the big-picture and localize a signal source. Unfortunately, most of the follow-on clones of APRS did not implement the two original APRSdos OMNI DF techniques which were fundamental to APRS from the beginning. Thus, very few people these days know they exist or use them much... But anyone can still enter a DF report no matter what software they use. See how to Enter a DFS report using UI-view..."
Eksterne henvisninger
- Live APRS kort: aprs.fi Arkiveret 31. maj 2020 hos Wayback Machine
- www.findu.com Arkiveret 23. april 2007 hos Wayback Machine Web-based access to worldwide APRS real-time data
- WB4APR web site
- APRS World Arkiveret 12. august 2015 hos Wayback Machine Open Source web-based APRS database
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