Latest symbol  Antenna
Latest Packet:
Position Packet
Receive Time:
AP51G3 via WIDE1-1,qAS,BD4SLL-10
Latest Forwarded:
Receive Time:
Latest Comment:
Receive Time:
(Received in latest packet)
Latest Status:
F52800BD074DDD APRS-51WIFI-20180630
Receive Time:
Latest Position4:
31.9266666666667, 120.298666666667
Receive Time:
(Received in latest packet)
Nearby locations:
Jiangyin , China 2.35 miles
Zhangjiagang , China 14.72 miles
Changzhou , China 22.82 miles
Wuxi , China 24.73 miles
Latest PHG6:

(Calculated range: 0 miles)
Packet frequency:
161s (Latest 10 packets)
Latest symbol
Search for BI4VNM at QRZ.COM!

(Link to

Check out current
weather in Jiangyin!

(Link to

Related stations/objects7:
Nearby stations/objects:
Symbol  BI4VNM-8 0 yd
Symbol  BD4TS-9 958 yd
Symbol  BI4SSB-13 1.36 miles
Symbol  BI4SSB 1.43 miles
Symbol  BI4SSB-10 1.48 miles
Symbol  BH4TNQ-10 3.14 miles
Symbol  BH4TPJ-10 3.68 miles
Symbol  BD4SLL-10 9.21 miles
Symbol  BD4SLL-13 9.24 miles
Symbol  BG4TJP-10 10.42 miles
Symbol  BD4WC-13 13.15 miles
Symbol  BD4WC-10 13.51 miles
Symbol  BH4SCF-13 15.29 miles
Symbol  BH4SCF-10 15.72 miles
Symbol  BY4SHX-10 16.99 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