Latest symbol  Igate (Generic)
Latest Packet:
Position Packet
Receive Time:
Aprx (software, Linux/Unix) by Kenneth W. Finnegan, W6KWF
Latest Forwarded:
Receive Time:
Latest Comment:
Digi & IGate Jurajski W2,SPn by SQ9NFI on Linux operator SP9JKL ==>
Receive Time:
(Received in latest packet)
Latest Telemetry:
Latest Position4:
50.5575, 19.4503333333333
Receive Time:
(Received in latest packet)
Nearby locations:
Włodowice , Poland 249 yd
Rudniki , Poland 2.63 miles
Zawiercie , Poland 5.04 miles
Kroczyce , Poland 5.26 miles
Latest PHG6:
Power 9 W, Height 39 ft, Gain 8 dB omni
(Calculated range: 11.61 miles)
Latest used symbols:
Symbol  Symbol 
Packet frequency:
50s (Latest 18 packets)
Latest symbol
Search for SR9NDJ at QRZ.COM!

(Link to

Related stations/objects7:
Symbol  SR9DJK
Nearby stations/objects:
Symbol  SR9DJK 13 yd
Symbol  ER-SR9JK 24 yd
Symbol  SR9UV B 24 yd
Symbol  SR9UV-B 24 yd
Symbol  SP9EZM-4 509 yd
Symbol  SQ9NFI-4 4.86 miles
Symbol  SQ9CIE-4 10.98 miles
Symbol  SP4TKL-1 11.81 miles
Symbol  SQ9PPR-1 15.45 miles
Symbol  SP9WPN-10 17.36 miles
Symbol  SP5X 21.03 miles
Symbol  SQ9GIN-PS 21.82 miles
Symbol  DW4604 21.87 miles
Symbol  SR9BN 22.02 miles
Symbol  PS-SQ9CH 23.04 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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