Linux Driver for the
RadioShack 12-258 S.A.M.E. Weather Radio
wxrd - Understanding the Server Output
Each line of output corresponding to an alert message can be broken down as follows. Note that by specification, each message is repeated three times. The timestamp, however, is generated by the server and is not part of the decoded message, so it will vary based on arrival time of each alert message.
|WXR RWT 039103-039153 20061206T113019+0020|
|WXR RWT 039103-039153 20061206T113034+0020|
|WXR RWT 039103-039153 20061206T113049+0020|
- Origin - The origin of the message. Since this radio receives National Weather Service broadcasts it should only ever be WXR
- Message - This is a three character code as defined by the EAS system. RWT in this sample stands for Required Weekly Test.
- Area Code - One or more 6-digit codes as defined by the EAS system, representing particular areas. Often the first 3 digits represent the state (039 = OH) and the second 3 are the county. If more than one area code, they will be separated by a hyphen.
- Timestamp - The server time when the message was received (YYYYMMDDTHHMMSS).
- Duration - The duration (HHMM), if transmitted. In practice, I have found that the duration is not always present in the message. In this case wxrd will insert 20 minutes as a default (this is usually wrong). The messages with missing durations tend to occur most often when the alert is issued not by the local NWS office (i.e. messages issued by the Storm Prediction Center in Norman, OK).