The most basic operation of a vessel monitoring system is to determine the location of the vessel at a given time, and periodically send this information, usually by satellite, to a monitoring station ashore. Most of vessels are tracked using the purple finder. This finder uses various satellites like Inmarsat, Globalstar and Thuraya for tracking the vessel. INMARSAT-C has been the most considered choice, since INMARSAT transceiver is already fitted onboard many ocean-going vessels as required by GMDSS (Global Maritime Distress and safety System).

Over the recent past, the vulnerability of Global Navigation Satellite Systems (GNSS) to interference has become a concerning issue (Mitch, 2011), (Pullen, 2012). Nowadays, illegal portable jamming devices are becoming popular to protect the user from being tracked by GNSS in their vehicle. These so-called personal privacy devices radiate different types of interference signals in the GNSS frequency bands and can make conventional receivers inoperable. Counter measures have to be taken to prevent strong interference from blocking the GNSS-receivers for safety critical applications.

MARK YOUR CALENDAR

UAVs: Set to fly high?

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October 2014

INTERGEO 2014

7-9 October

Berlin, Germany

www.intergeo.de

6th Asia Oceania Regional Workshop on GNSS

9-11 October 
Phuket, Thailand

www.multignss.asia/workshop.html

GeoForm

14-16 October 2014 
Moscow, Russia

http://www.geoexpo.ru/en-GB

Esri Mid-East & Africa User Conference

22 – 24 October 2014 
Kuwait

http://www.esri.com/events/meauc

ISGNSS2014

22 – 24 October 
Jeju Island, Korea

www.isgnss2014.org

35th Asian Conference on Remote Sensing

27-31 October

Nay Pyi Taw, Myanmar

www.acrs2014.com

NZIS Conference 2014

29 Oct – 1 Nov 
New Plymouth, New Zealand

www.nzisconference.org.nz

November 2014

Trimble Dimensions 2014

3 – 5, November

Las Vegas, …