Station info - map view · info · telemetry · weather · raw · status · beacons · messages · bulletins · browse · moving · my account
Callsign, ship name or locator: Clear       
It is possible to search using wildcards (*?) after a prefix. Example: OH*
APRS station AD1U - show graphs
Comment: *Unified Radios on RFinder-M6*
Location: 37°19.80' N 121°48.60' W - locator CM97CH29TE - show map
4.3 km South bearing 159° from Alum Rock, Santa Clara County, California, United States [?]
5.5 km Northeast bearing 27° from Seven Trees, Santa Clara County, California, United States
7.6 km East bearing 98° from San Jose, Santa Clara County, California, United States
73.0 km Southeast bearing 132° from San Francisco, San Francisco County, California, United States
Last position: 2025-10-17 03:40:16 UTC (1d 14h15m ago)
2025-10-16 20:40:16 PDT local time at Alum Rock, United States [?]
Device: Unknown: Unknown
Last path: AD1U>APRS via TCPIP*,qAC,T2CAEAST
Positions stored: 1
Other SSIDs: AD1U-15 AD1U-N
About this site
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.
User guide · FAQ · Blog · Discussion group · Linking to aprs.fi · AIS sites · Service status · Database statistics · Advertising on aprs.fi · Technical details · API · Change log · Planned changes · Credits and thanks · Terms Of Service · iPhone/iPad APRS