Mixing
What is this gap in the GNSS satellite trajectories?
Clash Royale CLAN TAG#URR8PPP
up vote
5
down vote
favorite
I've recently bought a USB-connected multi-constellation GNSS-receiver with a U-blox 8 chip in it. I've downloaded the U-center software that can display a lot of details about the received signals. One of those is the 'Sky View' window which logs the trajectories of the satellites the receiver is aware of. I've let it run in my windowsill for more than 12 hours, logging trajectories for the GPS, Glonass and Galileo satellites. I'm living in the Netherlands. This is the resulting image:
The green lines show the satellite trajectories used for calculating my position, the red ones are the known parts of their trajectories where they were not used. This lines up as expected with the view direction from my window.
My question is about the white area directly to the north where no satellite seems to cross. Is this a bug or effect of my setup or is there really such an area which GNSS-satellites don't cross? If the latter, what is the reason they don't?
gps satellite-constellation gnss
asked 1 hour ago
Bart Noordervliet
261
New contributor
Bart Noordervliet is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |Â
up vote
5
down vote
favorite
I've recently bought a USB-connected multi-constellation GNSS-receiver with a U-blox 8 chip in it. I've downloaded the U-center software that can display a lot of details about the received signals. One of those is the 'Sky View' window which logs the trajectories of the satellites the receiver is aware of. I've let it run in my windowsill for more than 12 hours, logging trajectories for the GPS, Glonass and Galileo satellites. I'm living in the Netherlands. This is the resulting image:
The green lines show the satellite trajectories used for calculating my position, the red ones are the known parts of their trajectories where they were not used. This lines up as expected with the view direction from my window.
My question is about the white area directly to the north where no satellite seems to cross. Is this a bug or effect of my setup or is there really such an area which GNSS-satellites don't cross? If the latter, what is the reason they don't?
gps satellite-constellation gnss
asked 1 hour ago
Bart Noordervliet
261
New contributor
Bart Noordervliet is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Don't worry, it's real! space.stackexchange.com/q/28017/12102
– uhoh
41 mins ago
add a comment |Â
up vote
5
down vote
favorite
up vote
5
down vote
favorite
I've recently bought a USB-connected multi-constellation GNSS-receiver with a U-blox 8 chip in it. I've downloaded the U-center software that can display a lot of details about the received signals. One of those is the 'Sky View' window which logs the trajectories of the satellites the receiver is aware of. I've let it run in my windowsill for more than 12 hours, logging trajectories for the GPS, Glonass and Galileo satellites. I'm living in the Netherlands. This is the resulting image:
The green lines show the satellite trajectories used for calculating my position, the red ones are the known parts of their trajectories where they were not used. This lines up as expected with the view direction from my window.
My question is about the white area directly to the north where no satellite seems to cross. Is this a bug or effect of my setup or is there really such an area which GNSS-satellites don't cross? If the latter, what is the reason they don't?
gps satellite-constellation gnss
asked 1 hour ago
Bart Noordervliet
261
New contributor
Bart Noordervliet is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I've recently bought a USB-connected multi-constellation GNSS-receiver with a U-blox 8 chip in it. I've downloaded the U-center software that can display a lot of details about the received signals. One of those is the 'Sky View' window which logs the trajectories of the satellites the receiver is aware of. I've let it run in my windowsill for more than 12 hours, logging trajectories for the GPS, Glonass and Galileo satellites. I'm living in the Netherlands. This is the resulting image:
The green lines show the satellite trajectories used for calculating my position, the red ones are the known parts of their trajectories where they were not used. This lines up as expected with the view direction from my window.
My question is about the white area directly to the north where no satellite seems to cross. Is this a bug or effect of my setup or is there really such an area which GNSS-satellites don't cross? If the latter, what is the reason they don't?
gps satellite-constellation gnss
gps satellite-constellation gnss
asked 1 hour ago
Bart Noordervliet
261
New contributor
Bart Noordervliet is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
Bart Noordervliet
261
New contributor
Bart Noordervliet is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
Bart Noordervliet
261
New contributor
Bart Noordervliet is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
Bart Noordervliet
261
asked 1 hour ago
Bart Noordervliet
261
261
New contributor
Bart Noordervliet is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Bart Noordervliet is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Bart Noordervliet is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Don't worry, it's real! space.stackexchange.com/q/28017/12102
– uhoh
41 mins ago
add a comment |Â
Don't worry, it's real! space.stackexchange.com/q/28017/12102
– uhoh
41 mins ago
Don't worry, it's real! space.stackexchange.com/q/28017/12102
– uhoh
41 mins ago
Don't worry, it's real! space.stackexchange.com/q/28017/12102
– uhoh
41 mins ago
add a comment |Â
1 Answer
1
active
oldest
votes
up vote
3
down vote
GPS satellite orbits go up to onlyl 55 degrees inclination, so there are regions over the poles that they do not fly directly over (they are high up enough that they give coverage in the polar regions). If you were sitting up at the North Pole, you would never see a GPS satellite climb higher than 55 degrees from the horizon, whereas if you were on the equator, you would see them pass overhead.
answered 37 mins ago
Dave
49625
add a comment |Â
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
3
down vote
GPS satellite orbits go up to onlyl 55 degrees inclination, so there are regions over the poles that they do not fly directly over (they are high up enough that they give coverage in the polar regions). If you were sitting up at the North Pole, you would never see a GPS satellite climb higher than 55 degrees from the horizon, whereas if you were on the equator, you would see them pass overhead.
answered 37 mins ago
Dave
49625
add a comment |Â
up vote
3
down vote
GPS satellite orbits go up to onlyl 55 degrees inclination, so there are regions over the poles that they do not fly directly over (they are high up enough that they give coverage in the polar regions). If you were sitting up at the North Pole, you would never see a GPS satellite climb higher than 55 degrees from the horizon, whereas if you were on the equator, you would see them pass overhead.
answered 37 mins ago
Dave
49625
add a comment |Â
up vote
3
down vote
up vote
3
down vote
GPS satellite orbits go up to onlyl 55 degrees inclination, so there are regions over the poles that they do not fly directly over (they are high up enough that they give coverage in the polar regions). If you were sitting up at the North Pole, you would never see a GPS satellite climb higher than 55 degrees from the horizon, whereas if you were on the equator, you would see them pass overhead.
answered 37 mins ago
Dave
49625
GPS satellite orbits go up to onlyl 55 degrees inclination, so there are regions over the poles that they do not fly directly over (they are high up enough that they give coverage in the polar regions). If you were sitting up at the North Pole, you would never see a GPS satellite climb higher than 55 degrees from the horizon, whereas if you were on the equator, you would see them pass overhead.
answered 37 mins ago
Dave
49625
answered 37 mins ago
Dave
49625
answered 37 mins ago
Dave
49625
answered 37 mins ago
Dave
49625
49625
add a comment |Â
add a comment |Â
Bart Noordervliet is a new contributor. Be nice, and check out our Code of Conduct.
Bart Noordervliet is a new contributor. Be nice, and check out our Code of Conduct.
Bart Noordervliet is a new contributor. Be nice, and check out our Code of Conduct.
Bart Noordervliet is a new contributor. Be nice, and check out our Code of Conduct.
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fspace.stackexchange.com%2fquestions%2f31824%2fwhat-is-this-gap-in-the-gnss-satellite-trajectories%23new-answer', 'question_page');
);
Post as a guest
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Don't worry, it's real! space.stackexchange.com/q/28017/12102
– uhoh
41 mins ago