Jcomm expert team on

Download 1.01 Mb.

Page	5/18
Date	18.10.2016
Size	1.01 Mb.
	#673

1 2 3 4 5 6 7 8 9 ... 18

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

Directory: Documents -> PublicWeb -> amp -> mmop -> documents -> JCOMM-TR
Documents -> The great global switch-off
Documents -> Nonprofit grant application
Documents -> The Truth about the Rwandan Genocide
Documents -> Annual InStructional unit plan
Documents -> Chaos equipment included
documents -> World meteorological organization data buoy cooperation panel annual report for
JCOMM-TR -> O. P. Singh saarc meteorological Research Centre (smrc)

Download 1.01 Mb.

Share with your friends:

1 2 3 4 5 6 7 8 9 ... 18