NDB DX'ING BLOG 190-1750 KHz

La station NAVTEX de Portsmouth en Virginie émet sur 518 KHz aux heures GMT suivantes : 0130, 0530, 0930, 1330, 1730 et 2130 pour la transmission des bulletins à destination des marins. Elle peut aussi transmettre en dehors de ces créneaux horaires s'il y a un message important voire une alerte. Cette station est régulièrement reçue depuis l'Europe et voici quelques extraits des messages captés ces derniers jours:

<05:48:33> ZCZC NA92
<05:48:36> CAPE CANAVERAL, FL//J//
<05:48:41> START AT TIME//031300Z MAR 09
<05:48:47> BNM 170-09
<05:48:50> BROADCAST PARA 1 THRU 3 AT N
<05:48:56> 1. THE GPS NAVIGATION SIG MAY BE UNRELIABLE DUE TO GPS
<05:49:06> TESTING ON GPS FREQUENCIES USED BY SHIPBOARD NAVIGATION AND
<05:49:17> HANDHELD SYSTEMS. SYSTEMS THAT RELY ON GPS, SUCH AS E-911,
<05:49:28> AIS AND DSC, MAY BE AFFECTED WITHIN A 35NM RADIUS OF PSN
<05:49:39> 38-15N 076-26W.
<05:49:43> 2. GPS TESTING WILL BE CONDUCTED ON THE FOLLOWING DATES
<05:49:54> AND TIME: 02 MAR 09 THRU 06 MAR 09 1300-2100Z (0800-1600 EST
<05:50:06>
<05:50:08> MON-FRIDAY ONLY)
<05:50:12> 3. MORE INFORMATION IS AVAILABLE AT THE COAST GUARD NAVIGATION
<05:50:23>
<05:50:25> CENTER WEB SITE WWW.NAVCEN.USCG.GOV AND THE MIRROR SITE
<05:50:36> WWW.NAVCENTER.ORG. DURING THIS PERIOD GPS USERS ARE ENCOURAGED
<05:50:48> TO
<05:50:49> REPORT ANY GPS SERVICE OUTAGES THAT THEY MAY EXPERIENCE TO THE
<05:51:00>
<05:51:02> NAVIGATION INFORMATION SERVICE (NIS) BY CALLING (703)313-5900
<05:51:13> OR
<05:51:15> BY USING THE NAVCEN WEB SITE TO SUBMIT A GPS PROBLEM REPORT.
<05:51:26>
<05:51:27> 4. REQUEST DISTRICT FIVE DISTRIBUTE THE INFORMATION CONTAINED
<05:51:38> IN
<05:51:40> PARA 1 THRU 3 TO POTENTIAL MARITIME USERS AND BROADCAST PARA
<05:51:51> 1
<05:51:53> THRU 3 AT REGULARLY SCHEDULED TIMES.
<05:52:01> 5. CEASE BUZZER PROCEDURES CONTAINED IN COMDTINST 16575.1 DTD
<05:52:13> 24
<05:52:15> AUG 99 (PROCESSING OF GPS INTERFERENCE TEST
<05:52:24> REQUESTS ARE IN EFFECT). POC FOR USCG IS THE NAVCEN ALEXANDRIA
<05:52:35>
<05:52:36> OPS CENTER AT (703) 313-5900. CG UNITS WITH SAFET_ OF LIFE
<05:52:47> MISSIONS THAT ARE ADVERS_L_ IMPACTED DUE TO LOSS OF GPS DURING
<05:52:58>
<05:53:00> ABOVE TEST P_RIODS DESCRIBE_ IN PARA 1 AND 2 SHOULDCONTACT NAVCEN
<05:53:12>
<05:53:13> VIA D5 OPCEN_BY_CALLING (757) 398-6231 TO REQUEST A STOPAGE OF
<05:53:25> THE
<05:53:27> GPS INTERFERENC_ T_STING_M_
<05:53:32> 6. CANCEL AT TIME //062100Z MAR 09//.
<05:53:40>
<05:53:42> NNNN


__ZCZC NA25
<05:46:49> BCST UNTIL CANCELLED
<05:46:53> SEC NC BNM 134-09
<05:46:57> NC - MYRTLE GROVE SOUND TO LITTLE RIVER (CHART 11534) - CAPE
<05:47:09> FEAR
<05:47:11> RIVER
<05:47:13> CAPE FEAR RIVER CHAN LIGHT_D BOUY 30 (LLNR 30665/39910) EXT.
<05:47:25>
<05:47:27>
<05:47:28> NNNN

On peut voir que le niveau de réception est bon car il n'y a pas trop d'erreur dans le message.

73 de Vincent