Inmarsat-C

RSS
Modified on 2016/03/06 20:01 by Jeff Palmer Categorized as Hardware
Inmarsat-C devices can be setup by configuring them for automatic polling and having the information routed to InmarsatC@ni-track.com.

Operations

Activation

An Inmarsat C terminal is activated by programming a DNID and member number (1-255) onto the terminal which allows the terminal to communicate with the Inmarsat ground station and pass traffic on the specific DNID. This can be programmed over the air by performing a "DNID Download" command which pushes a DNID and member number to the remote terminal. Once the DNID download is successful in any ocean region, the terminal can then pass traffic in any ocean region.

Operation

Polling

Once a terminal has been successfully activated with a DNID and member number, you can poll the terminal in all ocean regions, or a specific ocean region, and request an immediate position which will be returned in another message. A successful poll request means the remote terminal has received the poll request and is processing a response. When the position has been acquired and ready to transmit, it will transmit the current location. Polling does consume more airtime as there is a charge for the poll message, and a charge for the position response.

Scheduled Reports

Once a terminal has been successfully activated with a DNID and member number, it can also be programmed to send a position on an automatic interval. A single command is sent to set a schedule on the terminal, and the terminal will automatically acquire and send position reports. This does consume less airtime than polling for positions as there is only a position response, and not a poll command for every position.