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 US1UM-4 - show graphs
Map loading...
Location: 34°12.73' N 108°50.00' E - locator OM44JF90XW - show map - static map
1.6 miles Southwest bearing 231° from Yuhuazhai, Shaanxi, China [?]
2.7 miles West bearing 269° from Zhangbagou, Shaanxi, China
6.3 miles Southwest bearing 240° from Xi’an, Shaanxi, China
11.4 miles Southeast bearing 139° from Xianyang, Shaanxi, China
Last position: 2021-05-31 15:22:37 EDT (19d 11h13m ago)
2021-06-01 03:22:37 CST local time at Yuhuazhai, China [?]
Altitude: 0 ft
Device: Unknown: Unknown
Last path: US1UM-4>APRS via US1UM-3*,qAR,US0UM-1 (good)
Positions stored: 1
Other SSIDs: US1UM-3 US1UM-5 US1UM-7 US1UM-9 US1UM-B
Stations near current position of US1UM-4 - show more
callsign distance last heard - EDT      callsign distance last heard - EDT
HS5GDX-80.0 yards 0°2021-06-15 01:51:07 DL4OCH0.0 yards 0°2021-06-08 09:40:11
-90.0 yards 0°2021-06-19 18:39:45 -70.0 yards 0°2021-06-10 22:07:00
DL2KCM-70.0 yards 0°2021-06-18 05:58:08 SA4CJD-70.0 yards 0°2021-05-31 08:56:24
TB2BMA-90.0 yards 0°2021-06-19 11:03:18 F5NLU0.0 yards 0°2021-05-21 02:41:15
UA3ARF-70.0 yards 0°2021-06-17 17:35:05 SV2BXZ-70.0 yards 0°2021-06-19 06:20:12
N3PUU-70.0 yards 0°2021-05-22 14:33:03 K0ITP-90.0 yards 0°2021-06-18 18:41:09
DL9AAA-10.0 yards 0°2021-05-27 13:49:47 KE8JSQ-90.0 yards 0°2021-05-30 23:13:06
OK2TOP-50.0 yards 0°2021-05-23 16:54:13 DG5LAZ-70.0 yards 0°2021-06-13 12:43:25
KE0JVS-70.0 yards 0°2021-06-11 12:10:37 TA1TW-80.0 yards 0°2021-05-21 05:21:11
S56FUE-30.0 yards 0°2021-06-12 11:24:42 WF1C-80.0 yards 0°2021-06-19 15:00:55
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