Latest symbol  Digipeater (Fill-in digi, 1-hop limit)
Latest Packet:
Position Packet
Receive Time:
APN383 via qAR,AG6QR-1
KPC-3 by Kantronics
Latest Forwarded:
Receive Time:
Latest Comment:
Big Rock Fill-in W1,NCAn
Receive Time:
(Received in latest packet)
Latest Position4:
38.0555, -122.602666666667
Receive Time:
(Received in latest packet)
1900 ft
Nearby locations:
Lucas Valley-Marinwood , United States 1.82 miles
Sleepy Hollow , United States 3.27 miles
Novato , United States 4.01 miles
Fairfax , United States 4.78 miles
Latest PHG6:
Power 9 W, Height 489 ft, Gain 3 dB omni
(Calculated range: 30.47 miles)
Packet frequency:
415s (Latest 13 packets)
Latest symbol
Search for WB6TMS at QRZ.COM!

(Link to

Related stations/objects7:
Nearby stations/objects:
Symbol  EW7227 3.5 miles
Symbol  KG6MZV 4.01 miles
Symbol  EW0433 4.07 miles
Symbol  AG6QR-1 4.24 miles
Symbol  KB6HOH-10  (WINLINK) 4.93 miles
Symbol  AI6EE-10  (WINLINK) 4.93 miles
Symbol  FW1405 5.3 miles
Symbol  EW8418 5.45 miles
Symbol  WA6DNR 6.23 miles
Symbol  FW2185 6.33 miles
Symbol  K6SDR-10  (WINLINK) 6.48 miles
Symbol  FW2001 6.88 miles
Symbol  FW0247 7.17 miles
Symbol  NZ6J-13 8.85 miles
Symbol  EW9939 9.59 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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