Were I as ambitious as spacex, I would be looking for other places to launch from in the southern hemisphere or near the equator.
https://www.visualcapitalist.com/worlds-spaceports-mapped/ On Fri, Nov 17, 2023 at 5:43 AM Ulrich Speidel via Starlink <starlink@lists.bufferbloat.net> wrote: > > OK, so this seems to be related to a somewhat bigger development that > Starlink is pushing through Tonga as the regulatory authority: > > https://www.reddit.com/r/spacex/comments/175ttvz/spacex_files_29988satellite_wband_network_using/ > https://www.spaceintelreport.com/spacex-files-29988-satellite-w-band-network-using-kingdom-of-tonga-as-regulatory-home/ > > ESIAFI 1 was bought by Tonga - it was the old COMSTAR 4 satellite and named > after their women's rugby team. > > Quite why they've chosen Tonga as regulatory home - no idea. Maybe because > they think Tonga owes them a favour. Currently trying to find out more - stay > tuned. > > On 17/11/2023 6:29 am, David Fernández via Starlink wrote: > > Hi Alex, > > "A person on twitter seems to be saying this filing is precisely the > filing that spacex did at FCC" > > Would you mind linking to that tweet, if it is public? > > Thank you. > > Regards, > > David > > > > Date: Thu, 16 Nov 2023 14:27:03 +0100 > > From: Alexandre Petrescu <alexandre.petre...@gmail.com> > > To: starlink@lists.bufferbloat.net > > Subject: Re: [Starlink] Starlink filings for D-Band via Tonga > > Message-ID: <805d52ce-b517-49b9-a053-8306cd20b...@gmail.com> > > Content-Type: text/plain; charset=UTF-8; format=flowed > > > > Towards clarification, > > > > The .mdb file of the ITU filing can be read with Excel (tab Data -> > > leftmost button 'Access'). The .mdb is on the web page of the ITU > > filing, at the bottom of the page. > > https://www.itu.int/ITU-R/space/asreceived/Publication/DisplayPublication/53068 > > > > It might be that this 'ESIAFI II' is just a name because of some reason. > > > > There are some interesting dates like '06/03/2023', '13/03/2023' and > > '20/03/2023' and '6/10/2023'. > > > > There is much data about orbits, powers, beams that I dont know how to > > interpret. I would need the precise description of the database format, > > but I dont know where to get it from. > > > > The frequencies are listed, as I interpret these fields: 123 GHz - 130 > > GHz centered on 126.5 GHz, 158.5-164 c 161.25 and 167-174.5 c 170.75. > > > > About D-band: I am not sure what is precisely a 'D band' and I think > > that discussion about bands is very complicated. I know there is > > wikipedia page about it, yes. > > > > A person on twitter seems to be saying this filing is precisely the > > filing that spacex did at FCC; but comparing the numbers shows some > > differences: total sats per plane differ at some altitudes like at 525km > > altitude: ITU says 3600 sats whereas FCC says 3360 sats. There can be > > speculations as to why they differ as there can be errors of various > > people including myself. > > > > The person on twitter tells that ITU filing is in this table, but I dont > > know how he generated it. Not sure whether he made some syntax error. > > > >> Altitude (km) Inclination (degrees) Satellites per Plane Planes > >> Total Satellites > >> 340 53 110 48 5280 > >> 345 46 110 48 5280 > >> 350 38 110 48 5280 > >> 360 96.9 120 30 3600 > >> 525 53 120 28 3600 [nota by me: FCC says 3360 and not 3600, see > >> table below] > >> 530 43 120 28 3600 > >> 535 33 120 28 3600 > >> 604 148 12 12 144 > >> 614 115.7 18 18 324 > >> > > > > I found this earlier FCC document has this table at this URL > > https://docs.fcc.gov/public/attachments/FCC-22-91A1.pdf (not sure > > whether it is the most authoritative, but at least the mathematics > > 28*120 at altitude 525 does make sense to be 3360). > > > >> Altitude (km) Inclination (degrees) Orbital Planes sats/plane Total sats > >> > >> 340 53 48 110 5280 > >> > >> 345 46 48 110 5280 > >> > >> 350 38 48 110 5280 > >> > >> 360 96.9 30 120 3600 > >> > >> 525 53 28 120 3360 [nota by me: > >> 28*120 == 3360 indeed] > >> > >> 530 43 28 120 3360 > >> > >> 535 33 28 120 3360 > >> > >> 604 148 12 12 144 > >> > >> 614 115.7 18 18 324 > >> > > > > Alex > > > > > > Le 16/11/2023 à 10:30, Alexandre Petrescu via Starlink a écrit : > >> > >> Le 15/11/2023 à 16:48, David Fernández via Starlink a écrit : > >>> I have got news about the recent filing by Starlink for the use of > >>> frequencies in D-band: > >>> https://www.itu.int/ITU-R/space/asreceived/Publication/DisplayPublication/53068 > >>> > >>> > >>> This has been done via Tonga, not the USA, and is for both, uplink and > >>> downlink frequencies, although only downlink seems to be allocated now > >>> for satellite use. > >> > >> Thanks for the pointer. > >> > >> It is the first time I hear about this 'ESIAFI II' constellation. I > >> understand it is a different thing than the starlink existing > >> constellation. > >> > >> It adds to the list of plans of LEO Internet constellations (starlink, > >> kuiper, oneweb etc.) > >> > >> Alex > >> > >>> > >>> Regards, > >>> > >>> David > _______________________________________________ > Starlink mailing list > Starlink@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/starlink > > -- > **************************************************************** > Dr. Ulrich Speidel > > School of Computer Science > > Room 303S.594 (City Campus) > > The University of Auckland > u.spei...@auckland.ac.nz > http://www.cs.auckland.ac.nz/~ulrich/ > **************************************************************** > > > > _______________________________________________ > Starlink mailing list > Starlink@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/starlink -- :( My old R&D campus is up for sale: https://tinyurl.com/yurtlab Dave Täht CSO, LibreQos _______________________________________________ Starlink mailing list Starlink@lists.bufferbloat.net https://lists.bufferbloat.net/listinfo/starlink
