ITU controls the slots: https://alexsli.com/thespacebar/2017/7/the-international-telecommunications-union-orbital-satellite-parking-enforcement
Mark > On Feb 25, 2021, at 6:02 PM, Steve Jones <[email protected]> wrote: > > Who controls the parking spots? And what if you just decide to put one there? > I'd like to have Elon dough where I could just get in a parking spot fight in > space for spite. I wonder if alec Baldwin is the enforcer, he just punches > you in the face if you take a spot. > > On Thu, Feb 25, 2021, 4:30 PM Brian Webster <[email protected] > <mailto:[email protected]>> wrote: > Matt, > > Looking at your post on Facebook, I think you have > misunderstood the Geostationary definition. There is only one orbit height > that rotates around the earth at the same speed as the Earth rotates and it > is located at the equator. That is called the Clarke Belt and it is 22,236 > miles above the earth. Your question about a Leo and it being Geostationary > are contradictions in terms. In the Clarke belt since it’s just one line of > “parking spots” around the earth (at the equator only), one does not just set > up their own. They are very coveted spots in the belt and only the expensive > birds reside there. At 22,236 miles above the earth, a Cambium radio or > similar device won’t have enough power to reach back to a CPE. In addition to > that and you will have high latency just like the current geostationary > satellite systems do. That radio signal has to travel 44,472 miles, hence the > latency people complain about. > > > > https://en.wikipedia.org/wiki/Geostationary_orbit > <https://en.wikipedia.org/wiki/Geostationary_orbit> > > > > > Thank you, > > Brian Webster > > www.wirelessmapping.com <http://www.wirelessmapping.com/> > > > From: AF [mailto:[email protected] <mailto:[email protected]>] On > Behalf Of Robert > Sent: Thursday, February 25, 2021 4:31 PM > To: [email protected] <mailto:[email protected]> > Subject: Re: [AFMUG] Your Own Satellite Internet > > > > Yes, Look up the various "xxxxStats" that have been tethered at the borders > over the years with balloons for radar coverage of low flying aircraft and > the NOTAMS that are posted for them. They have a very large ( relatively ) > exclusion zone and you have to worry about said tethers falling and doing > damage on the way down. > > On 2/25/21 11:39 AM, Jason McKemie wrote: > > Those tethers would be a nightmare for aviation. > > > > On Thu, Feb 25, 2021 at 1:31 PM Brian Webster <[email protected] > <mailto:[email protected]>> wrote: > > One also has to calculate the window that your satellite is visible on the > ground of your target service area based on the altitude you will have the > bird orbiting. Many times any of the Amateur radio satellites only have a 10 > or 15 minute window of visibility a few times a day. For 24/7 internet > service you need to have many orbital object/satellites such that when one > move out of view another is there for the handoff. The lower orbit you have, > the smaller window you have. So a LEO small footprint coverage is still going > to take a lot of satellites just to cover you small territory. How many all > depends on the area and altitude. Since your satellite is not going to be in > a stationary orbit, I am sure you need international cooperation to file for > all the orbits you need to just cover your small footprint in the US because > that orbit goes all the way around the earth and has effect on others who > might need a similar orbit. A good portion of the time your satellite is > flying through the sky for your local footprint, it’s not going to be doing > much of anything because it’s not visible to any of your customers. Until we > get some sort of tethered satellite solution that is tied to the ground and > centrifugal force hold the satellite in place, these are the laws of physics > one has to contend with. If someone can invest a very lightweight tethering > string of some sort that when it is long enough the total weight of said > string does not overcome the amount of centrifugal force achieved at your > desired height to allow the radio/satellite to stay in place without needing > to be an orbital object. If that is invested and it also allows for > transmission of adequate power and data, that could be a real game changer. > As far as I know 90,000 feet of something to be a good tether weighs more > than the force that could keep the device flung out that far. > > > > > > > > Here is an animated version of this graphic > https://commons.wikimedia.org/wiki/File:Iridium_Coverage_Animation.gif > <https://commons.wikimedia.org/wiki/File:Iridium_Coverage_Animation.gif> > > > If you want to get an idea of satellite visibilities and the number of times > per day you can view it, this program is a great satellite prediction and > tracking program http://gpredict.oz9aec.net/ <http://gpredict.oz9aec.net/> > > > > Here is a short video that does a decent job of illustrating the complexity > of orbital mechanics one has to consider. Earth rotation, orbit direction, > power consideration if you want to be sun synchronous etc. > > https://www.youtube.com/watch?v=omv38sEBxk8&feature=emb_logo > <https://www.youtube.com/watch?v=omv38sEBxk8&feature=emb_logo> > > > > > > > Thank you, > > Brian Webster > > www.wirelessmapping.com <http://www.wirelessmapping.com/> > > > From: AF [mailto:[email protected] <mailto:[email protected]>] On > Behalf Of Carl Peterson > Sent: Thursday, February 25, 2021 1:43 PM > To: AnimalFarm Microwave Users Group > Subject: Re: [AFMUG] Your Own Satellite Internet > > > > As Adam points out, your satellite isn't just going to float there. It needs > a lot of speed. That speed would have it moving "past" you really really > fast until you got to about 26k miles up where it would remain still relative > to you. If you wanted it to float at 90k' you would need a balloon or > something like that but that's a loony idea. > > > > > > On Thu, Feb 25, 2021 at 12:34 PM Adam Moffett <[email protected] > <mailto:[email protected]>> wrote: > > I know a guy I could ask. > > On 2/25/2021 1:20 PM, Steve Jones wrote: > > can you get hot pockets on jail commissaries? > > > > > > On Thu, Feb 25, 2021 at 12:08 PM Adam Moffett <[email protected] > <mailto:[email protected]>> wrote: > > well....Aiming at thousand foot tower from close range customers we are > definitely sometimes more than 3 degrees up. Put me in jail I guess. > > > > On 2/25/2021 1:02 PM, Matt Hopkins wrote: > > If I recall correctly it is illegal to aim a 5GHz radio > 3° above the > horizon. > > > > On Thu, Feb 25, 2021 at 9:43 AM Matt Hoppes > <[email protected] > <mailto:[email protected]>> wrote: > > So here me out. I've been to low earth orbit (90,000 feet) with > equipment I can get in my basement/hardware store. I've beamed signals > back from 90,000 feet to a radio in my truck. > > I'm familiar with how AmSats work (although have not sent one up myself). > > What is preventing a WISP from putting together a solar powered GeoSync > satellite that has a few Cambium Spots on it to fully cover your > coverage area? > > Yes, you'd have capacity issues if you didn't plan it correctly, but is > there technically any reason I can't run a 5GHz link to a satellite? > Do you have to pay a "rental" fee to occupy a space in space to park > your bird? > > Yes, I realize there would be latency, but if you keep the throughput > there (something Hughes Doesn't Do), the experience wouldn't be half bad > for most things.. > > -- > AF mailing list > [email protected] <mailto:[email protected]> > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > <http://af.afmug.com/mailman/listinfo/af_af.afmug.com> > > > -- > AF mailing list > [email protected] <mailto:[email protected]> > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > <http://af.afmug.com/mailman/listinfo/af_af.afmug.com> > > > -- > AF mailing list > [email protected] <mailto:[email protected]> > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > <http://af.afmug.com/mailman/listinfo/af_af.afmug.com> > > > > -- > > Carl Peterson > > PORT NETWORKS > > 401 E Pratt St, Ste 2553 > > Baltimore, MD 21202 > > (410) 637-3707 > > -- > AF mailing list > [email protected] <mailto:[email protected]> > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > <http://af.afmug.com/mailman/listinfo/af_af.afmug.com> > > > > > -- > AF mailing list > [email protected] <mailto:[email protected]> > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > <http://af.afmug.com/mailman/listinfo/af_af.afmug.com> > <image001.gif><image002.jpg><image002.jpg>-- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com
-- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com
