Yes, it is possible for an LPFM (Low Power FM) station to be rebroadcast on the HD subchannel of another station. HD Radio technology allows traditional FM stations to broadcast digital signals, including multiple subchannels alongside their main analog signal. These subchannels can carry additional content, which might include rebroadcasting content from other stations, such as LPFM stations. However, the specifics of such an arrangement would depend on agreements between the stations involved, regulatory considerations, and technical compatibility. It’s essential to ensure that any rebroadcasting arrangement adheres to applicable regulations and is carried out with the necessary permissions and agreements in place.