You said - My "Spot" did not work in Sydney - what was your sky view like at the time? Obstructions such as buildings
Mountains etc will stop your message getting out. ============================================================================ ======== Mal to honest your comment about the Globalstar network is a bit strong; what is important is that Those planning to using the networks understand the capabilities and limitations of each network and make their Purchase decisions based on that knowledge, in the same way we have all made decisions about which Mobile Phone network we use. I have both a SPOT and an Iridium based tracker on trial as a work project and know which one I prefer to use. SDF _____ From: [email protected] [mailto:[email protected]] On Behalf Of Grant Hudson Sent: Sunday, 7 June 2009 4:28 PM To: Mal Bruce; Discussion of issues relating to Soaring in Australia. Subject: Re: [Aus-soaring] My "Spot" did not work in Sydney yep On Sun, Jun 7, 2009 at 12:24 PM, Mal Bruce <[email protected]> wrote: The Globalstar network is crap. https://srt.glpconnect.com:2044/osat/ The Globalstar Network comprises 40 satellites operating at 1400km altitude, and a ground gateway infrastructure. The satellites are organised into 8 orbital planes with 5 satellites per plane. The orbital planes are inclined to the equator at 56 degrees which provides an approximate coverage within the latitudes 70 degrees North to 70 degrees South when ever there is co-visibility with a ground gateway. The Globalstar Network does not perform satellite to satellite cross-link switching and so ground connection in Australia is by 3 gateways operated by Pivotel. Outside of Australia there is a network of Globalstar partners who operate gateways that provide international roaming coverage. The Iridium Network comprises 66 satellites operating at 780km altitude, and the ground gateway infrastructure. The satellites are organised into 6 orbital planes with 11 satellites per plane. This ensures that each location on the globe is covered by at least one satellite at any one time. The satellites spin around the earth at over 26,000km/h or circle the earth every 100 minutes, and the orbital planes go over the poles. Each satellite is connected to four other satellites in the network. The two adjacent satellites in the same plane and two satellites in the planes either side. Through this cross-linking the satellites can route calls from satellite to satellite until it reaches one in view of the ground gateway. The ground gateway then connects the call to the Pivotel switching infrastructure. _______________________________________________ Aus-soaring mailing list [email protected] To check or change subscription details, visit: http://lists.internode.on.net/mailman/listinfo/aus-soaring
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