Also CPE observation time is 3 minutes...
On 5/6/24 1:10 PM, Robert wrote:
If you look at the orbits the density of the non-polar paths get
higher at higher latitudes so when there were only 200-500 sats in
orbit, you got a lot more sat "hits" looking farther north. The pass
off time from one sat to another is much lower than you might expect
when the sat is actually visible for 4-10 minutes in the 100 degree
arc that the CPE observes. On the order of 1-3 minutes pass-off
time. Now that they are at 5->10K sats you can look anywhere and
get massive number of hits in that 1-3 minutes. They didn't start
polar orbits until about a year ago to hit Alaska and higher
latitudes. They needed the cross sat relays to work before they
could reach decent ground stations from that north/south. Looking
north doesn't help anymore except to optimize avoiding the Clark orbits.
On 5/6/24 12:52 PM, Chuck McCown via AF wrote:
I presumed they were in polar orbits.
Google shows a bunch of criss cross inclined orbits.
I don’t see how looking in the northern direction would help.
*From:* Robert
*Sent:* Monday, May 6, 2024 1:37 PM
*To:* af@af.afmug.com
*Subject:* Re: [AFMUG] Interesting (to me)
Well, as I said, you have to take _everything_ she writes with the
understanding that she is an alarmist and a promoter. I would be
pretty sure she got paid by both T-Mobile and Hiboost, & I have seen
others say the same problem she mentioned about Weboost but both
times it was proven to be a bad setup. ( I have weboost but don't
need it )
Starlink has to avoid transmitting into the Clark Belt, they are
using the same frequencies. So they use the northern hemisphere.
If you aren't on the equator, your dish can be flat and avoid the
Clark Belt no problemo. Beam steering decides the pointing and tilt
is just a hangover of the earlier constraints..
Before the number of sats reached where they are now, they tended to
use a higher latitude center of focus for the sats because you get
more density at the northern inclinations of the orbits. That is
going away rapidly. I flat mount my dish in the shower bubble of my
RV for mobile use. It shows no obstructions when not under an
actual obstruction. It now takes a pretty high/close cliff to
obstruct the dish and we are seeing the latest s/w doing much better
with a smaller sky area and probably 15 degrees higher in latitude
than in the past. Some people have seen their dishes pointing east
and west and, amazingly, south. I suspect that was because Starlink
was testing the relay system on them. The latest version of the dish
is supposed to support dual beams from what people are reading in the
software analysis. It comes with a fixed stand that only tilts it
about 15-20 degrees off vertical. The understanding is that the tilt
is now just for snow/water shedding.
Starlink has busy hour lower priority for _mobile_ users. It puts
the mobile users behind the fixed users for b/w. _Not_ throttled.
Lower speeds during 6-10pm are for the same reasons our networks
experience it and Starlink has loaded on the customers way heavier
than we probably would.
It takes a _LOT_ of rain to reduce the performance of Starlink.
I've seen no issues with 1/4-1/2"/hr rain. Granted that is rare in N.
NV. But they are transmitting with a lot of power in both
directions. I got my first solid disconnection during a massive
storm in TX when we were there for the eclipse. That was enough
rain that it was piling up in the street. I didn't check my weather
station as we were headed for a storm shelter.
On 5/6/24 11:10 AM, Chuck McCown via AF wrote:
What I found most interesting were the following things I did not know:
* Starlink needs a _Northern_ sky exposure
* Starlink has busy hour throttling
* Starlink slows with rain (expected, and understandable but had
not heard that before)
I liked that she found a brand of booster that she says works well.
*From:* Robert
*Sent:* Monday, May 6, 2024 11:59 AM
*To:* af@af.afmug.com
*Subject:* Re: [AFMUG] Interesting (to me)
I've watched her for years and she has, occasionally, some good
stuff. But on the whole she has gotten so into promoting what she
was paid for and in a few cases gotten caught promoting bad products.
She major league jumped on board a cell internet reseller and
promoted a really dishonest company because she didn't wait long
enough for the bad to come out. Then claimed innocence...
Well here she was again. T-Mobile just chomped down on those people
using T-mobile home service away from home. If you want to do what
she is promoting, it's now $160/month
On _any_ cellular internet service, I say wait 1.5 years to find out
if the provider is really going to support it or is it a bait and
switch. ATT did exactly that 4 years ago, even promoting the
service with mobile users just to pull it all away after usage
became too high in just over a year.
On 5/6/24 10:16 AM, Chuck McCown via AF wrote:
https://youtu.be/XcofyNWDyao?si=0ulY_LiFcb2HlnaY
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