Comment:	47F HDOP04.3 SATS04
Location:	42°30.63' N 71°06.22' W - ตำแหน่ง FN42KM72NM - show map 5.3 km ตะวันออกเฉียงเหนือ bearing 49° มาจาก Woburn, Middlesex County, Massachusetts, United States [?] 7.0 km ตะวันออกเฉียงเหนือ bearing 23° มาจาก Winchester, Middlesex County, Massachusetts, United States 17.3 km เหนือ bearing 348° มาจาก Boston, Suffolk County, Massachusetts, United States 20.2 km เหนือ bearing 347° มาจาก South Boston, Suffolk County, Massachusetts, United States
Last position:	2025-04-13 20:51:02 UTC (246d 15h22m ago) 2025-04-13 16:51:02 EDT เวลาท้องถิ่น Woburn, United States [?]
Altitude:	52 m
Course:	291°
ความเร็ว:	17 km/h
Device:	Argent Data Systems: OpenTracker (tracker)
Last path:	KB1MKD>APOT21 via WIDE1-1,WIDE2-1,qAR,KB1MKD-2
Positions stored:	121
Other SSIDs:	KB1MKD-2 KB1MKD-5

This page shows real-time information collected from the Automatic Position Reporting System Internet network (APRS-IS). APRS is used by amateur (ham) radio operators to transmit real-time position information, weather data, telemetry and messages over the radio. A vehicle equipped with a GPS receiver, a VHF transmitter or HF transceiver and a small computer device called a tracker transmits it's location, speed and course in a small data packet, which is then received by a nearby iGate receiving site which forwards the packet on the Internet. Systems connected to the Internet can send information on the APRS-IS without a radio transmitter, or collect and display information transmitted anywhere in the world.