Source callsign:	BG4ESI-S
Comment:	440 Voice 433.60000MHz +0.0000MHz
Location:	31°13.52' N 121°29.33' E - locator PM01RF84PB - show map 2.7 km South bearing 181° from Hongkou, Shanghai Shi, China [?] 2.9 km East bearing 83° from Shanghai, Shanghai Shi, China 5.0 km Southwest bearing 215° from Yangpu, Shanghai Shi, China 85.3 km East bearing 96° from Suzhou, Jiangsu Sheng, China
Last position:	2025-07-24 13:04:14 UTC (18h ago) 2025-07-24 21:04:14 CST local time at Hongkou, China [?]
Last path:	BG4ESI-S>APDG01 via TCPIP*,qAC,BG4ESI-GS
Positions stored:	45

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.