www.dilupe.com

 

 

 

 


 

 
DILUPE and the Inmarsat D+ system


 

 

 

 

 

Inmarsat was established in 1979 to serve the maritime industry by developing satellite communications for ship management and distress and safety applications, Inmarsat currently operates a global satellite system which is used by independent service providers to offer an unparalleled range of voice and multimedia communications for customers on the move or in remote locations.

 

Inmarsat D+ is a low-cost, two-way store-and-forward data service offering short messaging and position reporting through a built-in Global Positioning System (GPS) receiver.   Inmarsat D+ provides virtually global coverage from a small, lightweight, low-power terminal, and can be used in conjunction with web-based tracking applications, often provided as part of an overall package.

 

In 1996, Dilupe engineers worked on the first Inmarsat D+ modem (the JRC JUE610D) together with the JRC engineers and the Inmarsat engineers in London.  The first “Real satellite” D+ message was sent by the Dilupe engineers, and the message originated from their offices in Brussels to the Inmarsat engineers TEST LES in London over the AORE satellite.

 

In 1997 Dilupe's engineers created the first data terminal "The Mercury" with 2 way messaging software.  Over the next few years this terminal was superseded by the DMT-500 and a full blown application for SkyWave.   In 2002 Dilupe introduced the DSAT software for the DMT-1500.  In 2005 DILUPE wrote 2 messaging programs unique to Satamatics for the DMT-500 and the DMT-1500.   

 

Dilupe engineers have over 10 year's positive experience with Inmarsat D+, and will continue to support the efforts of all VAR's of both SkyWave and Satamatics with new products and software applications.

 

 

   

 

 

 

 

 

To Mobile messages

 

From Mobile messages

  • Tone Only - Up to four alert signals.

  • Numeric - Up to 32 numeric or special characters (0..9, Space, (, ), +, X)together with one of four alerts signals

  • Alpha-Numeric – Up to 128 characters may be transmitted as a single message together with one of four alert signals.

  • Transparent Data – Messages of up to 2000 bits together with one of four alert signals.

 
  • Acknowledgement Burst – Automatically transmitted by the terminal when it receives a message including an acknowledgement request.
  • Short Data Burst – can contain up to 27 bits of user information in addition to overheads, such as PID.
  • Long Data Burst – can contain up to 64 bits of user information in addition to overheads, such as PID.