|Satsig web site: Africa navigation index:|
Blue Sky Satellite Comunication are based in Johannesburg, South Africa, and have been involved in providing satellite services in Africa for the past 8 years.
Fixed VSAT dish: Broadband internet connection
The capacity you need and the monthly charges will depend on your
application. The least expensive will be a VSAT for a single PC user. The
most expensive will be a VSAT used to to provide internet trunking
connection for a medium sized town ISP with hundreds of PCs, VoIP phones and
base cell phone site included.
The middle coverage map shows the coverage of the whole of southern Africa using the Eutelsat W3A Africa beam. The service comes from the Eutelsat Skylogic (Viasat Linkstar) VSAT hub is located in the European beam where it is connected to the world internet terrestrial trunk system. The beam is cross strapped on the satellite so that two transponders are in use - one each way. Downlink frequency to Africa is 1120.75 MHz (into the LinkStar box)
The corresponding European coverage beam is shown below. For more information about how this works see here: http://www.satsig.net/w3a-europe-africa.htm
Large business, town ISP or large corporate
For large business or ISP operations dedicated satellite capacity is appropriate and the technology offered for this is DVB outlink and SCPC type modem for your return link. If the DVB capacity is dedicated to you [prices for the satellite capacity are much higher but the service is such that any congestion will be under your own control. Point to point linking is also possible and for this larger dishs are preferred at both ends, such as 2.4m diameter.
Portable and satellite phones / laptop sized satellite internet terminals.
More portable solutions are offered by the Thuraya, Inmarsat and Iridium satellite networks. These include Hughes, SO-2520, SO-2510, Iridium 9505A and Nera Worldphone. Laptop sized internet terminals include Explorer 500 BGAN, REGIONAL BGAN, HNS 9201 BGAN and Worldpro 1000 BGAN.
Address: Blue Sky Satellite Communications 17 Soetdoring
Ave., Bassonia 2061, Johannesburg, South Africa.
Postal Address: Post Net Suite 201, Private Bag X4, Bedfordview 2008, South Africa
Here are some pictures below of their VSAT installations in Africa.
Note the square tube behind the feed horn. This square tube is the polariser and has two rows of pins inside. It may be attached at two alternative 90 deg positions (for left hand LHCP or right hand RHCP circular reception) to the OMT junction which is in the centre of the picture. The receive LNB, at the bottom, is joined to the OMT via a transmit reject filter. The C band transmit BUC is on the lower left. Note that the entire feed assembly does not need to be adjusted in rotation. Its function as either a RHCP or LHCP receive depends on the way you bolt the polariser to the OMT. If you get no receive signal try undoing the 8 bolts and trying it the other way.
|Patriot Ku band dish and ChannelMaster dish. Note the high elevation angle of the Patriot antenna. The offset configuration means then when the beam is pointed almost straight up that the surface is still tilted to avoid water accumulating during rainfall. The strong rim prevents bending with temperature variations or with the weight and distortion is avoided. This means an accurate surface shape and excellent beam gain and performance.|
Here are some technical details about Blue Sky Satellite Communications services showing the satellites, carrier frequencies and the VSAT technologies used.
Blue Sky are a Virtual Network Operator (VNO) with direct control of their iDirect VSAT hubs on IS-802 and IS-10-02
|Satellite||L-band IF carrier freq.||VSAT tech.|
|Intelsat IS-802||1129.6 MHz||iDirect Ku-Band|
|Intelsat IS-10-02||1264.34 MHz||iDirect C-Band|
|Intelsat IS-903||1263 MHz||Skystar C-Band|
|Eutelsat W3A||1220.75 MHz||Linkstar Ku-Band|
|Eutelsat AB3||1423.25 MHz||Linkstar C-Band|
I have written this page at the request of Blue Sky
Satellite Communications. It is simply for your information and is not a
Page started 28 June 2006, amended 17 Dec 2014.