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 AA4SI-9 - show graphs
Map loading...
Comment: 146.970MHz
Mic-E message: In service
Location: 38°38.80' N 77°20.33' W - locator FM18HP95IE - show map - static map
1.6 miles Northwest bearing 294° from Dale City, Prince William County, Virginia, United States [?]
2.4 miles West bearing 271° from Potomac Mills, Prince William County, Virginia, United States
23.7 miles Southwest bearing 224° from Washington, D. C., Washington, D.C., United States
59.1 miles Southwest bearing 222° from Baltimore, City of Baltimore, Maryland, United States
Last position: 2020-10-20 11:33:58 EDT (1d 20h47m ago)
2020-10-20 11:33:58 EDT local time at Dale City, United States [?]
Altitude: 272 ft
Course: 218°
Speed: 17 MPH
Device: Kenwood: TM-D710 (rig)
Last path: AA4SI-9>S8SX8P via WIDE1-1,WIDE2-1,qAR,KG4URP-1 (good)
Positions stored: 43120
Other SSIDs: AA4SI-7
Stations near current position of AA4SI-9 - show more
callsign distance last heard - EDT      callsign distance last heard - EDT
KK4TCE-50.5 miles 111°2020-09-30 21:42:48 5130.7 miles 347°2020-09-26 12:42:02
AA4SI-70.7 miles 104°2020-10-09 14:04:07 N6RXT B0.7 miles 118°2020-10-22 08:11:15
N6RXT-B0.7 miles 118°2020-10-22 08:11:25 6RXT-B0.7 miles 118°2020-10-20 02:35:06
WA0DYJ-131.3 miles 142°2020-10-22 06:03:38 A0DYJ-131.3 miles 142°2020-10-20 21:23:27
A0DY1.3 miles 142°2020-10-20 22:29:44 5171.5 miles 198°2020-09-26 12:44:32
5201.8 miles 88°2020-09-26 12:46:32 5101.8 miles 133°2020-09-26 12:54:32
KC9ONB-72.2 miles 242°2020-10-05 18:25:47 KG4ICG2.2 miles 13°2020-09-28 20:58:34
KO4BYB2.3 miles 238°2020-09-28 20:10:43 FW72982.4 miles 36°2020-10-22 08:17:53
5182.7 miles 300°2020-09-26 12:45:02 KO4ARB-i2.7 miles 180°2020-10-05 17:23:40
N1BED-92.8 miles 287°2020-10-21 18:11:56 5262.9 miles 336°2020-09-26 12:52:02
Stations which heard AA4SI-9 directly on radio –
callsign pkts first heard - EDT last heard longest (tx => rx) longest at - EDT
KG4URP-1 1 2020-10-20 11:33:58 2020-10-20 11:33:58 FM18HP > FM18IQ 3.9 miles 40° 2020-10-20 11:33:58
W4VA-10 2 2020-10-13 12:22:19 2020-10-13 12:23:40 FM18IP > FM18BR 28.0 miles 282° 2020-10-13 12:23:40
W4AD-10 3 2020-10-20 11:31:06 2020-10-20 11:33:31 FM18IP > FM18IQ 3.3 miles 8° 2020-10-20 11:32:32

Only position packets which were originated by the station are shown here. The range statistics show some extra long hops, because some digipeaters do not correctly add themselves to the digipeater path. Please check the raw packets.
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