Latest symbol  Igate (Generic)
Latest Packet:
Position Packet
Receive Time:
Latest Forwarded:
Receive Time:
Latest Comment:
Receive Time:
(Received in latest packet)
Latest Position4:
35.1273333333333, 140.052333333333
Receive Time:
(Received in latest packet)
Nearby locations:
Kamogawa , Japan 3.43 miles
Minamibōsō , Japan 9.73 miles
Katsuura , Japan 14.9 miles
Sodegaura , Japan 19.86 miles
Latest PHG6:
Power 49 W, Height 89 ft, Gain 3 dB omni
(Calculated range: 19.95 miles)
Latest symbol
Search for JQ1ZUJ at QRZ.COM!

(Link to

Nearby stations/objects:
Symbol  JO1YLU-3 10.18 miles
Symbol  JP1YEM-I 18.07 miles
Symbol  JI1DLW-9 20.62 miles
Symbol  JS1PEI-2 20.81 miles
Symbol  JI1DLW 21.24 miles
Symbol  JQ1ZIF-4 23.34 miles
Symbol  JQ1ZIF-2 23.34 miles
Symbol  JK1ZPR-2 23.35 miles
Symbol  JM1YTU-3 24.56 miles
Symbol  JH1CWL-13 24.86 miles
Symbol  JJ1YEG B 25.41 miles
Symbol  JJ1YEG C 25.41 miles
Symbol  JJ1YEG-B 25.41 miles
Symbol  JJ1YEG-C 25.41 miles
Symbol  JO1UIC-10 35.11 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.
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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