1、带序号的基站兼容不支持序号的测站（2307开头）

sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D331RtcmMessageExecutor.java

@@ -53,6 +53,9 @@ public class D331RtcmMessageExecutor implements Executor<D331RtcmMessage, Void>
                     if (logger.isDebugEnabled()) {
                         logger.debug("forward d331 rtcm message to device {}", deviceId);
                     }
+                    if(deviceId.startsWith("2307")){
+                        forwardBytes[2] = (byte) (forwardBytes[2]&0x07);//兼容不带序号的测站
+                    }
                     ByteBuf buf = Unpooled.buffer();
                     buf.writeBytes(forwardBytes);
                     deviceChannel.writeAndFlush(buf);