Latest symbol  Digipeater
Latest Packet:
Status Packet
Receive Time:
AGWtracker (software, Windows) by SV2AGW
Latest Forwarded:
Receive Time:
Latest Comment:
PHG2230/AGWUIdigi ECD Udon-ken
Receive Time:
Latest Status:
AGWUIDigi ECD(Error Correction Digipeater)
Receive Time:
(Received in latest packet)
Latest Position4:
34.2518333333333, 133.9865
Receive Time:
Nearby locations:
Takamatsu , Japan 10.78 km
Sakaidechō , Japan 15.95 km
Marugame , Japan 19 km
Zentsujichó , Japan 19.37 km
Latest PHG6:

(Calculated range: 0 km)
Packet frequency:
2880s (Latest 5 packets)
Latest symbol
Search for JA5OJF at QRZ.COM!

(Link to

Related stations/objects7:
Nearby stations/objects:
Symbol  JR5IZI 2.28 km
Symbol  JA5OJF-12 2.5 km
Symbol  JA5UJT-10 10.26 km
Symbol  JA5CRC-10 10.94 km
Symbol  JA5EXN-1 11.71 km
Symbol  JF5EOC-9 12.27 km
Symbol  JR5CFK 14.29 km
Symbol  JA5WUO-9 14.46 km
Symbol  JG5WUN-1 15.18 km
Symbol  JH5HTX-13 17.15 km
Symbol  JR5GDP 18.48 km
Symbol  JA5GGB 22.27 km
Symbol  JP5YCV-I 22.96 km
Symbol  JR5WH-I 30.07 km
Symbol  JR5YFF-10 32.29 km

  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

© 2015-2018 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:


Station filter

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