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 ORBCOMM LOW ORBITING SATELLITE
 

Satellite Communation
 

ORBCOMM Satellite
 

ORBCOMM Earth Station
 

Network Control Station
 

End User Receive Data Via Email

     The following is the some of the feature highlights for ORBCOMM:

  • Uses 36 small Low earth orbiting satellite (LEOS) by ORBCOMM orbiting 825 Kilometers above the earth

  • Remote two way communications monitoring systems

  • Low cost satellite communications, especially in remote locations

  • Units use economical VHF electronics and simple antenna design and small package offer installation flexibility.

  • Low power electronics enable extended operations using batteries, solar panels or available power.

  • A complete ORBCOMM Monitoring system offered by SCADATRON consists of a ST2000 CPU, appropriate sensor, a Satellite Communicator (SC) with antenna, and power source.

  • The ST2000 CPU provides continuous, onsite monitoring and data logging. Monitored data can be downloaded periodically over the satellite link. Initial service offerings available in several "windows of communications" available in a 24 hour period.

  • Operational parameters can also be adjusted remotely over the link.

  • The ORBCOMM System offers significant advantages over other, traditional remote monitoring solutions. Among these are lower installation cost; two way satellite link; lower power requirements; optional position data.

  • ORBCOMM is the world's first, wireless, two way data and message communications system providing worldwide transmitted by the satellites is moved through earthbound "Gateway Earth Stations", and from there to the ORBCOMM Network Control Center.

  • Data can be sent and received by the end user using a personal computer equipped with a dial-up modem.

  • ORBCOMM Messaging System operation is similar in concept to cellular phone service, but is strictly for data communications. No voice capability is available.

  • ORBCOMM is a federally licensed carrier. All FCC requirements are met by ORBCOMM, making universal application possible anywhere in the United States, and in many foreign countries coverage.

  • The global system includes up to 36 MicroStar Satellites

  • Data is communicated to earth gateways via narrow band VHF frequencies.

  • Satellite Communicators (SC) are small,lightweight devices capable of accessing the system and transferring data. They transmit at 2400 BPS and receive at 4800 BPS. These devices integrate together with data collection and monitoring equipment to provide full transfer capability to and from the ORBCOMM system, and thus to the end user.

 

 
  ORBCOMM Satellite Link

The ORBCOMM System uses Low-Earth Orbit (LEO) satellites instead of terrestrial fixed site relay repeaters to provide worldwide geographic coverage. The system is capable of sending and receiving two-way alphanumeric packets, similar to twoway paging or e-mail. The best application of ORBCOMM system is when there is no means of reliable terrestrial communication in a particular remote station. ORBCOMM Satellites Act as “orbiting packet routers” built to “grab” small data packets from ground communicators and relay them through a Gateway Earth Station (GES) to a Gateway Control Center (GCC) in Network Control Center (NCC).

 
Telemetry System Configuration Using ORBCOMM Low Orbiting  Satellite System:
   
1 ST2000 RTU acquire data from respective sensor and send data in packet format into the a Subscriber Communicator (SC) connected to it’s RS232C serial port at a prefixed interval.
 
2 The SC after detect a ORBCOMM Satellite passing and confirmed the Gateway Earth Station (GES) at sight will automatically send the data message through up-link to the ORBCOMM Low Orbiting Satellite (LEO) through it’s VHF antenna.
 
3 ORBCOMM Low Orbiting Satellite after received the data packet will then down-link the data to the ORBCOMM Gateway Earth Station (GES) in Kijal, Terengganu, Malaysia.
 
4 Data message received in GES will be transferred to Network Control Center (NCC) in Petaling Jaya through CELCOM fiber/ microwave link.
 
5 Network Control Center (NCC) will then send data in form of email to Internet Service provider (ISP) email account.
 
6 Telemetry Master Station periodically connect to Internet Service Provider (ISP) though dial-up or leased-line to retrieve email from mail server.
 
7 The Data Processing Unit in Master Station then process the email received and extract telemetry data, display
the data and store in database.