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How to configure and check your weather station computer program

1. Set up instructions for computer programs

Here are set-up directions for several computer programs that support CWOP. Note that the current recommendations on servers and on packet rate are in the link "APRS Servers to Use" in the list at upper right. The set-up pages may not have the current recommendations.

The table a few screens down the CWOP program information page tells about all the programs that support CWOP.

2. Set up instructions for Internet devices

3. APRS Internet Service (APRS-IS) servers

These are the servers to use when you send your citizen weather data packets to CWOP. How to change server designations in your local weather program is covered in the set-up pages above. If your program is not listed there, contact the program author.

If your computer program has the capability to enter more than one server, it's a good idea to do so. This table of hourly traffic shows which APRS-IS servers are currently up and available. If your packet starts with CW, DW, EW, FW or GW, you should be sending to one (or more) of the four CWOP servers listed above.

4. Citizen Weather packets on APRS-IS data stream

Your computer connects to an APRS-IS server and sends a data packet, which gets put into the APRS-IS data stream. These files show the CW data packets and DW data packets and EW data packets and FW Weather packets and GW Weather packets that appeared in the APRS-IS data stream during the time indicated. You can see if your packets are getting to the APRS-IS data stream and check how they compare with other packets. The last day that data were received from REGISTERED STATIONS and from UNREGISTERED STATIONS is also available.

5. Citizen Weather Stations in the database

A web page has a time-ordered listing of the CITIZEN WEATHER STATIONS that have sent data within the past 10 days. You can see the data and how long ago they were sent.

Entering where the CWxxxx (or DWxxxx, EWxxxx, FWxxxx or GWxxxx) is your Citizens Weather Designator into your browser is another way to check if your data is getting to The server can give you a topographic map of the area around your weather station (for sites in the USA), and you can see a satellite photograph of the surrounding area for some locations. The server handles a wide variety of traffic. Here's a list of the latest activity.

A listing of faulty packets received by is also available. If your packets appear in this listing, to find the problem you may want to compare with the packets in CW Weather packets or DW Weather packets or EW Weather packets or FW Weather packets or GW Weather packets.

6. Your Latitude, Longitude and Elevation

A good way to accurately determine your latitude, longitude and elevation is given under item # 4 in the CWOP FAQ.

Page generated on Jun 6, 2021. Site maintained by CWOP Support. Send any comments to cwop-support at noaa dot gov.