Latest symbol  Digipeater (with overlay M)
Latest Packet:
Position Packet
Receive Time:
APRSIS32 (software, Windows) by KJ4ERJ
Latest Forwarded:
Receive Time:
Latest Comment:
Univ. of Michigan Sunday Net 8 pm
Receive Time:
(Received in latest packet)
Latest Beacon:
AA:Go Blue from W8UM ARC in Ann Arbor
Receive Time:
Latest Status:
University of Michigan Amateur Radio Club - Mtg 3rd Thurs at 6:30 pm
Receive Time:
Latest Telemetry:
Latest Position4:
42.2921666666667, -83.7133333333333
Receive Time:
(Received in latest packet)
Nearby locations:
Ann Arbor , United States 1.73 miles
Ypsilanti , United States 6.22 miles
Saline , United States 9.35 miles
Whitmore Lake , United States 10.32 miles
Latest PHG6:
Power 25 W, Height 89 ft, Gain 2 dB omni
(Calculated range: 15.92 miles)
Packet frequency:
450s (Latest 12 packets)
Latest symbol
Search for W8UM at QRZ.COM!

(Link to

Related stations/objects7:
Nearby stations/objects:
Symbol  EW1607 0.89 miles
Symbol  145.23-UM 1.54 miles
Symbol  EL-301138 1.55 miles
Symbol  FW3745 1.83 miles
Symbol  DW7729 2.87 miles
Symbol  W8RP 3.58 miles
Symbol  ARROW-2M 3.59 miles
Symbol  W8XM-10 3.79 miles
Symbol  KD8WUI 4.61 miles
Symbol  N4IYL 4.72 miles
Symbol  FW5205 5.74 miles
Symbol  EW0325 6.55 miles
Symbol  KE8GJZ 8.4 miles
Symbol  FW5647 8.51 miles
Symbol  KB8RCO 9.87 miles

  1. A packet is either recived from the regular APRS-IS servers or from the CWOP servers. Packets received from the APRS-IS servers are sent from ham radio operators, and packets received from the CWOP servers are sent from citizen weather stations.
  2. To get a better understanding of the APRS path I recommend reading the explanation written by wa8lmf.
  3. Used Aprs Device according to the APRS device identification database.
  4. Position accordning to the Google geocoding service, based on the reported latitude and longitude (if we get no valid position from the Google gecoding service we will show the latitude and longitude).
  5. This is the Maidenhead Grid Square Locator, used by ham radio operators to specify a location (using few characters).
  6. PHG stands for Power-Height-Gain (and directivity). The height is not the height above sea-level, it is the height above average terrain (HAAT = Height Above Average Terrain). PHG is used to calculate the relative RF range of a station. If this station has reported several positions or symbols the PHG data will only be used for the position and symbol used in the PHG-packet.
  7. If station has more than 30 related stations we will only show the 30 closest related stations.
Initial position
Current position

© 2015-2019 Per Qvarforth SM4WJF
All Rights Reserved

In this tab we show all APRS packets of any packet type that has been added to the map.

In this tab we show APRS packets of type position that has been added to the map (note that any station may send a position packet).

In this tab we show all APRS packets of type object or item that has been added to the map.

In this tab we show APRS packets of type weather that has been added to the map (note that any station may send a weather packet, not only weather stations).

In this tab we show APRS packets of type direction finding, telemetry, message, query and status that has been added to the map.

Select date and time to show map data for (enter time for your locale time zone). The regular time length select box can still be used to select how old data that should be shown (relative to selected date and time).

*Note that the heatmap will still based on data from the latest hour (not the selected date and time).

Date and time:


APRS Direct

Current time is:


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