ARLA/CLUSTER: Bob Bruninga (WB4APR) realiza teste subterrâneo em APRS

[João Costa > CT1FBF]

Radio Hams test APRS underground

 Bob Bruninga, WB4APR, has been testing how the amateur radio
Automatic Packet Reporting System (APRS) can be used to extend radio
communications underground

The ARRL say Bob led a group of radio amateurs earlier this month to
Mammoth Cave - the world’s longest known cave system - at Mammoth Cave
National Park in Kentucky to test how the Automatic Packet Reporting
System (APRS) can be used as a means to extend radio communications
underground.

 “When used underground, VHF and UHF radios can only work within a few
hundred feet of each other and only when in the line of sight of
another radio,” Bruninga explained. “This makes routine use of these
radios of little value when underground; however, when APRS radios act
as packet digipeaters, these few hundreds of feet can be extended by
an order of magnitude.”

Bruninga, a senior research engineer at the US Naval Academy,
developed APRS as a global, on-air protocol for supporting handheld
position reporting and text messaging via VHF radio.

Read the full ARRL story at
http://www.arrl.org/news/bob-bruninga-wb4apr-takes-aprs-underground