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1.6. Feedback from users





  • no complaint about availability and contents of bulletins.

  • Some NAVTEX users complained because they did not receive sometimes the scheduled bulletins in the correct slot: This problem had been solved by delaying automatically the transmission of scheduled bulletins to the station (if needed), to avoid broadcasting them in the previous slot.

  • Some (mainly non SOLAS) users would like more detailed further outlooks. This request will be discussed in the next months.


1.7. Monitoring
Real time checking of the transmission to the CES is available by displaying the files containing the interactive dialogues between our Center in Toulouse and the CESs.
Table I : transmission of scheduled bulletins to CES for Metarea II - AOR-E satellite (%) - January 1999/June 2002



AOR-E




Year 1999

Year 2000

Year 2001

Year 2002

Month

within H15 min.

within H30 min.

Non available

within H15 min.

within H30 min.

Non available

within H15 min.

within H30 min.

Non available

within H15 min.

within H30 min.

Non available

01

87

98

0

85

98

2

90

95

5

94

94

0

02

95

98

0

77

98

2

95

100

0

93

98

0

03

94

100

0

94

97

3

91

97

3

97

100

0

04

92

95

0

98

98

0

98

98

0

100

100

0

05

98

100

0

98

100

0

92

94

6

98

100

0

06

100

100

0

95

95

0

88

88

12

100

100

0

07

94

98

0

98

98

0

94

97

0










08

95

100

0

98

98

0

93

97

0










09

90

91

0

98

98

2

94

95

3










10

94

95

0

96

100

0

100

100

0










11

91

95

2

80

88

12

93

94

0










12

71

92

2

80

99

0

92

95

0











Table II : transmission of scheduled bulletins to CES for Metarea II - AOR-W satellite (%) - January 1999/June 2002



AOR-W




Year 1999

Year 2000

Year 2001

Year 2002

Month

within H15 min.

within H30 min.

Non available

within H15 min.

within H30 min.

Non available

within H15 min.

within H30 min.

Non available

within H15 min.

within H30 min.

Non available

01

87

98

0

83

98

2

90

95

5

94

94

0

02

95

98

0

77

98

2

95

100

0

93

98

0

03

94

100

0

94

97

3

91

97

3

97

100

0

04

89

92

0

97

98

0

98

98

0

100

100

0

05

98

100

0

98

100

0

92

94

6

98

100

0

06

100

100

0

94

94

0

88

88

12

100

100

0

07

89

92

0

97

98

0

94

97

0










08

95

100

0

98

98

0

94

99

0










09

89

90

0

95

98

2

94

95

3










10

94

95

2

94

99

0

100

100

0










11

91

95

2

79

88

12

93

94

0










12

71

92

2

80

99

0

95

95

5


















SES reception checking system

Forecasters have also at their disposal an Inmarsat-C SES, according to IMO and WMO recommandations, to check the broadcasting from a given satellite. A specific system had been developped, allowing forecasters or somebody else to get in real-time all the MSI received by the SES, using any computer (PC, workstation,…) connected to the Local Area Network (LAN) of Météo-France. The aim is to provide with a friendly tool for forecasters to check in real-time the reception of all the SafetyNet messages they produce.

This system is described figure 3 :


  • The receiver and the antenna (material: TT 3022D from CAPSAT Company)

  • A computer (PC, Linux operating system) connected to the SES, with a dedicated software (coded in JAVA) gathering all the messages by querying the receiver

  • Place all messages received at everybody’s disposal via a web server installed on the same PC

  • The Local Area Network for distant access

Figure 3 : system description





The system is built to allow everybody who has a connection to the Local Area Network and a web navigator to check the messages received. Figure 4 shows the user display unit. The forecaster is able to select all the messages available for a dedicated date and issued from a dedicated CES. It is also possible, using the software, to connect the SES to another satellite, as far as this connection is possible according to the locations of this satellite and the receiver antenna. In this case, of course, the messages sent through the previous satellite are not received any more.



Figure 4 : display unit





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