EUM/OPS/09/VWG/003 M. HornyIssue 1 – 27-29 October 2009 Page 1

Plans for the Introduction of a High Rate DCP Service on MSG

• DCP and HRDCP Comparison• HRDCP message• Overall Planning• User and Manufacturer Liaison

EUM/OPS/09/VWG/003 M. HornyIssue 1 – 27-29 October 2009 Page 2

DCP Comparison

“Standard” DCP

Baud Rate = 100 bps

Current Slot allocation = 1min30sec.

Timing accuracy = +/- 15 seconds

Data per DCP message = 649 bytes

Channel bandwidth MTP = 3KHz

Channel Bandwidth MSG = 1.5 KHz

Max nb of messages per channel per day = 760

High Rate DCP

Baud Rate = 1200

Slot allocation = 10 sec minimum

Timing accuracy = +/- 0.5 seconds

Data per DCP message min 653 bytes for 10 second time slot.Channel Bandwidth = 2.25 KHz

Max nb of messages per channel per day = 10800

Maximum message size single message = 65535 bytes

EUM/OPS/09/VWG/003 M. HornyIssue 1 – 27-29 October 2009 Page 3

HRDCP Message format

Header Platform DataCRC

Trailer

4 2 1 2 3

DCP Address

31

Res .

1

Platform Data

Length

16

Sequence

Counter

8

Engineering Information

Version

3

Type

1

Compr .

2

Health

10

Spare

24

12 bytes 4 bytes

1 – 65535 bytes ( but also TX time limited )

Bits

Bytes

MSB

Sent First

EUM/OPS/09/VWG/003 M. HornyIssue 1 – 27-29 October 2009 Page 4

Main HRDCP characteristics

• Support lossless compression • Scrambled and encoded, using a convolutional

concatenated encoder – RS (255,232) as inner code –• Modulation modes:

– CMM1: unmodulated carrier only,– CMM2: BPSK modulation for preamble and ASM,

and– CMM3: OQPSK for HRDCP coded message frame.

EUM/OPS/09/VWG/003 M. HornyIssue 1 – 27-29 October 2009 Page 5

Overall Planning

• Phase 1- DCP Receiver Prototype Testing with standard DCPs – November 2009

• Phase 2- DCP Receiver Prototype Testing with HRDCPs – 3rd Quarter 2010

• Phase 3 - Operational Implementation – End 2010

EUM/OPS/09/VWG/003 M. HornyIssue 1 – 27-29 October 2009 Page 6

Users and Manufacturers Liaison

• September 2009 EUMETSAT Meteorological Satellite Conference – A poster presented at the conference with information about HRDCPs.

• DCP Flyer– A EUMETSAT DCP Flyer will be produced describing the Meteosat Data

Collection System and highlighting the benefits of HRDCPs. This is planned for 4th quarter 2009.

• HRDCP Workshop– This workshop is planned for 15th of March 2010 aimed at DCP

manufacturers and large DCP Operators and will cover:– Overall HRDCP implementation plan– Detailed discussion of the HRDCP specifications – Manufacturers plans for the introduction and marketing of

HRDCPs– HRDCP certification process

EUM/OPS/09/VWG/003 M. HornyIssue 1 – 27-29 October 2009 Page 7

CONTACT

EUMETSATMichel Horny:E-mail: Michel.Horny@eumetsat.intPhone: +00 49 6151 807 891Fax: +00 49 6151 807 304