Global Teleports (UK) Ltd Vipersat Hub

N and S America
Americas detailed coverage
Europe, N Africa, Middle E
 
Africa - CDM570L C band
West Africa - Ku band
Southern Africa - Ku band
S. Africa lease transponder
Indian Ocean Region
Middle East Intelsat 12
Afghanistan AM1
Pakistan AM22

Global Teleports VSAT service: Ku band and C band VoIP and internet access.


1. North East America, Caribbean, Bahamas, Cayman, Jamaica, Dominica etc

Use this high power Ku band spot beam satellite map to determine feasibility of operation, considering exact location of your VSAT terminal.  For Ku band, operation must be above 10 deg elevation to reduce rain attenuation and tropospheric scintillation effects.  The third elevation contour line from the left, marked 10 deg, is the limit.

Typical dish size 89cm or 1.2m diameter.  Extreme outer contours require 1.8 or 2.4m diameter.
Small, semi-transportable,  89cm antennas may be used.
Any bit rate from 2.4kbit/s to 10 Mbit/s.  Price $700 per month per dedicated 100kbit/s pro rata.

Typical network configuration:  Downlink 1024 kbit/s shared into 4 VSAT sites, each VSAT site has 64k dedicated uplink. Each site has up to 20 PCs and 2 VoIP phones.  Total capacity = 1280 kbit/s at $8960 per month or $2240 per site. 

Connection is via Global Teleports Vipersat hub at Brookmans Park, London, UK.

Go here for Caribbean and  North America and USA latitude, longitude and dish pointing calculations.
 

Detailed satellite beam maps for North & South America and the Caribbean

NSS-7 North West Ku band spot beam satelite map
The NSS7 satellite is at 22 deg west longitude providing coverage of the US and Caribbean. iIncluding Cuba, Jamaica, Haiti, Dominican Republic, Puerto Rico and Virgin Islands.

2. Ku band NSS7 satellite beam coverage for Caribbean and the North East of South America.

Connection is via Global Teleports Vipersat hub in Washington, DC, USA.

Typical customer site:

1.2m dish, CDM570L modem, PLL LNB, 3 or 5 watt integrated Ku band TRIA (transmit BUC/LNB combined)

Downlink 1024 kbit/s.  Uplink 256 kbit/s

If dedicated to one site the satellite capacity is suitable for local ISP or business serving around 80 PCs and 10 VoIP phones.

The CDM-570L modem comes with IP header compression (e.g. reducing G729a VoIP packets from 32 kbit/s to 10.8 kbit/s), packet payload compression (compressing text file by around 1.6 - 2.09 times) and QoS prioritisation to make sure that VoIP packets are given priority over email and web browsing data transfers.  This is the key to making VoIP speech smooth, continuous and uninterrupted.

NSS7 Andean beam
The service area, in addition to the Caribbean islands, includes Guatemala to Panama and Peru, Ecuador, Colombia, Venezuela, Guyana, Suriname and Guinea

3. Ku band NSS7 satellite beam coverage for South America.

Connection is via Global Teleports Vipersat hub in Washington, DC, USA.

Example multi-site customer configuration:

1.2m dish, CDM570L modem, PLL LNB, 3 watt integrated Ku band TRIA (transmit BUC/LNB combined) at each of four sites.

Total customer usage:  Downlink 1024 kbit/s.  Uplink 256 kbit/s

The 1024 would be shared to all four sites and the uplink capacity could be assigned as four dedicated 64kbit/s carriers or as a TDMA system.  Each of the four sites might have between 5 and 20 PCs or VoIP phones.  If the emphasis was on VoIP then several simultaneous calls, each at 10.8 kbit/s from each site, would be possible.

The CDM-570L modem comes with IP header compression (e.g. reducing G729a VoIP packets from 32 kbit/s to 10.8 kbit/s), packet payload compression (compressing text file by around 1.6 - 2.09 times) and QoS prioritisation to make sure that VoIP packets are given priority over email and web browsing data transfers.  This is the key to making VoIP speech smooth, continuous and uninterrupted.

For a internet cafe type application where discipline of the end user customer is necessary we would suggest a GuardianBox of similar traffic supervision device be used by the VSAT operator to prevent abuse (virus sending, MP3 file sharing etc) of the satellite capacity.

NSS7 South America Ku cone beam
Serving Chile, Argentia, Uraguay, Brazil, Paraguay, Bolivia, Falkland Islands.

4. High power NSS-8 C band coverage of Central and South America cross connected to UK

The C band West Hemi beam and the C band North East zone beam are interconnected.

Coverage includes the Falkland Islands.

Connection is via Global Teleports Vipersat hub in Washington, DC, USA or Global Teleports Vipersat hub at Brookmans Park Teleport UK..

 

Contact details:

Roger Boddy: Global Teleports,

Brookmans Park Radio Station, Great North Road, Hatfield, Herts, AL9 6NE, England


By Phone: +44 (0) 1707 648311 

By Fax:  +44 (0) 1707 648 319   

By Email:  enquiries@globalteleports.com
 


Satellite map of NSS-8 west hemi beam, including Falklands, Argentina, Brazil, Chile, Bolivia, Peru, Paraguay, Ecuador, Colombia, Venezuela, Guyana, Suriname, French Guiana, Panama. The C band hemi beam is connected with the European / UK north east zone beam.

5. C band coverage of Central and South America

C band operation is less affected by heavy rain.   This broad (lower power) hemi beam is suitable for larger dish operations, particularly at nodes such as WiFi sites, community ISP, critical business, teleports etc who have a requirement for very high availability.

For C band, operation should be above 5 deg elevation, marked by the second line from the left.

Typical VSAT dish sizes required: 1.8m, 2.5, 3.8m  diameter.

Coverage includes the Falkland Islands.

Connection is via Global Teleports Vipersat hub in Washington, DC, USA.

Go here for satellite dish pointing angles in Peru

The NSS7 satellite is at 22 deg west longitude

Satellite map of NSS-7 west hemi beam
Satellite map of NSS-7 west hemi beam including Falklands, Argentina, Brazil, Chile, Bolivia, Peru, Paraguay, Ecuador, Colombia, Venezuela, Guyana, Suriname, French Guiana, Panama.

Larger dish sizes are always preferred if practically possible, as they will provide better link margins and allow advanced high efficiency modulation schemes to work, which may reduce monthly costs by nearly 2/3rd in the case of 8-PSK or nearly 1/2 in the case of 16-QAM modulation methods.  Assuming 1.2m antenna as the baseline operating with QPSK, 8-PSK may be possible with 1.8m dish and 16-QAM with 2.4m dish.

C band operation required large antennas than Ku band but suffers less from degradation during very heavy rain.  Local radio interference may be a problem at C band.

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Vipersat VSAT service for North & South America and the Caribbean

Page created 24 Nov 2005    Amended 15 Oct 2008 (Eric Johnston)      Copyright Satellite Signals Ltd ? 2005 all rights reserved.