Comment:	438.500MHz 守听绿谷无线，收439.475
Location:	40°09.43' N 116°16.82' E - locator ON80DD37PR - show map 8.5 km Southeast bearing 143° from Changping, Beijing, China [?] 29.1 km Northeast bearing 33° from Mentougou, Beijing, China 29.5 km North bearing 340° from Beijing, Beijing, China 136.4 km Northwest bearing 326° from Tianjin, Tianjin Shi, China
Last position:	2025-05-25 23:20:36 UTC (38d 8h43m ago) 2025-05-26 07:20:36 CST local time at Changping, China [?]
Altitude:	34 m
Course:	0°
Speed:	0 km/h
Device:	Open Source: APRSdroid (app, Android)
Last path:	BD1AFL>APDR16 via TCPIP*,qAC,T2SWEDEN
Positions stored:	24
Other SSIDs:	BD1AFL-7

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.