DS DS/EN 61108-4
DS DSEN 61108-4 2004-DEC-03 Martme navgaton and radocommuncaton equpment and systems - Global navgaton satellte systems GNSS -- Part 4 Shpborne DGPS and DGLONASS martme rado beacon recever equpment - Performance requrements methods of testng and requred test results
