Location:	37°57.70' N 121°57.08' W - locator CM97AX50UT - show map 2.7 km Northwest bearing 329° from Clayton, Contra Costa County, California, United States [?] 7.2 km East bearing 105° from Concord, Contra Costa County, California, United States 46.0 km Northeast bearing 63° from San Francisco, San Francisco County, California, United States 69.3 km North bearing 356° from San Jose, Santa Clara County, California, United States
Last position:	2026-02-28 20:27:03 UTC (2m55s ago) 2026-02-28 12:27:03 PST local time at Clayton, United States [?]
Last WX report:	2026-02-28 20:27:03 UTC (2m55s ago) – show weather charts 23.3 °C 65% 1012.7 mbar 0.0 m/s West
Last path:	EW6555>APN000 via TCPXX*,qAX,CWOP-4
Positions stored:	3

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.