Source callsign:	W9ROY-S
Comment:	440 Voice 435.60000MHz +0.0000MHz
Location:	41°37.21' N 87°43.70' W - ตำแหน่ง EN61DO28OU - show map 1.1 km ตะวันตกเฉียงใต้ bearing 237° มาจาก Midlothian, Cook County, Illinois, United States [?] 2.3 km ตะวันออกเฉียงเหนือ bearing 34° มาจาก Oak Forest, Cook County, Illinois, United States 26.4 km ใต้ bearing 194° มาจาก Chicago, Cook County, Illinois, United States 51.5 km ตะวันออก bearing 107° มาจาก Aurora, Kane County, Illinois, United States
Last position:	2025-11-29 09:09:26 UTC (11d 6m ago) 2025-11-29 03:09:26 CST เวลาท้องถิ่น Midlothian, United States [?]
Last path:	W9ROY-S>APDG01 via TCPIP*,qAC,W9ROY-GS
Positions stored:	145

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.