Panasonic 3.0 사용자 설명서

EchoMap v3.0 

Washington State.  The fifth GES is located in Curacao, French Antilles in 

Central America. 

ORBCOMM's GESs link the ground segment with the space segment from 

multiple locations worldwide.  The GESs provide the following functions: 

•

  Acquire and track satellites based on orbital ephemeris data 

•

  Transmit and receive packets to/from the satellites 

•

  Provide connectivity between satellites and NCC (GCC) 

•

  Monitor status of local GES hardware/software  

•

  Monitor system level performance of satellites "connected" to the NCC 

(GCC)  

The GES is redundant in that it has two steerable high-gain VHF antennas 

that track the satellites as they cross the sky.  The GES transmits to each 

satellite at a frequency centered at 149.61 MHz at 57.6 KBPS with a 

nominal power of 200 watts.  

The GES receives 3-watt transmissions from the satellite at 137-138 MHz 

range. 

The NCC is responsible for managing the ORBCOMM network elements 

and the U.S. gateways through telemetry monitoring, system 

commanding and mission system analysis.  It provides network 

management of ORBCOMM's satellite constellation and is staffed 24 hours 

a day, seven days a week by certified controllers.  The NCC performs the 

following functions: 

•

 

Monitor real-time and back-orbit telemetry from ORBCOMM satellites  

•

 

Send real-time and stored commands to the satellites  

•

 

Provide the tools and information to assist engineering with resolution of 

satellite and ground anomalies 

•

 

Archive satellite and ground telemetry for analysis 

•

 

Monitor performance of the GESs  

•

 

Monitor status of the U.S. based ORBCOMM Message Switch (OMS) and 

related software 

•

 

Monitors connection to and status of the EFMS  

The Echo Flight Message Switch receives a continuous, worldwide 

weather feed.  The EFMS continually processes weather to reply to in-

flight weather requests.   All data is sent or received directly through the 

EFMS center via a dedicated high-speed frame relay line with an additional 

dial-up line as backup.