Latest symbol  Car
Latest Packet:
Position Packet
Receive Time:
AP51G3 via WIDE1-1,qAS,BR4IA-10
Latest Comment:
12.9V 51G3
Receive Time:
(Received in latest packet)
Latest Beacon:
Receive Time:
Latest Position4:
31.58, 120.349833333333
Receive Time:
(Received in latest packet)
Nearby locations:
Nanchansi , China 3.16 miles
Chong’ansi , China 3.22 miles
Beidajie , China 3.54 miles
Wuxi , China 3.69 miles
Latest PHG6:

(Calculated range: 0 miles)
Latest symbol
Search for BG4IAJ at QRZ.COM!

(Link to

Related stations/objects7:
Nearby stations/objects:
Symbol  BH4TDV-13 386 yd
Symbol  BG4JHJ-13 1.5 miles
Symbol  NOCALX-13 1.5 miles
Symbol  BI4RYL-10 5.63 miles
Symbol  BH4RSN-13 5.74 miles
Symbol  BG4TYQ-10 6.38 miles
Symbol  PS-BG4TGO 6.44 miles
Symbol  BH4TNM-0 12.36 miles
Symbol  BG4TZR-0 13.1 miles
Symbol  BI4XDT 16.71 miles
Symbol  BG4CLH-B 18.55 miles
Symbol  BG4CLH B 18.55 miles
Symbol  BD4TS-9 23.88 miles
Symbol  BI4VNM-13 24.14 miles
Symbol  BI4VNM-B 24.29 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:


Station filter

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