Any difference on Satellite location between W135 and W075?

AI Thread Summary
The discussion focuses on the differences in satellite locations W135 and W075, both in geostationary orbit but positioned over different areas of the Earth. W135 is located at 135 degrees west, over the Pacific Ocean, while W075 is at 75 degrees west, roughly over New York City. The participants clarify that the measurement of solar x-ray intensity is not affected by the satellite's position above the Earth, as both satellites observe the same phenomena. They also discuss how the Earth's magnetic field and solar wind can influence particle detection at these locations, suggesting that variations in readings may occur based on the time of day. Overall, the conversation emphasizes the satellites' roles in monitoring Earth rather than space, with limited upward-looking instruments.
junk0
Messages
40
Reaction score
0
Referring to following link, it provides satellite location on W135, I would like to know what difference on Satellite location between W135 and W075, how does its measurement affect the Earth differently.

Does anyone have any suggestions?
Thanks in advance for any suggestions

http://www.swpc.noaa.gov/ftpdir/lists/xray/Gp_xr_5m.txt
 
Last edited by a moderator:
Astronomy news on Phys.org
What sort of difference would you expect? That list of datapoints is measuring solar x-ray intensity, position above the Earth is not going to matter. The GOES satellites are all in geostationary orbit, so with instruments looking at earth, the difference is going to be what's below them.
 
justsomeguy said:
What sort of difference would you expect? That list of datapoints is measuring solar x-ray intensity, position above the Earth is not going to matter. The GOES satellites are all in geostationary orbit, so with instruments looking at earth, the difference is going to be what's below them.

What W135 represents in location?
Do you have any suggestions on what location is difference between W135 and W075?

Thanks you very much for any suggestions
 
Lines of Longitude. W135 is over the Earth in geostationary orbit at 135deg west, over the pacific about halfway between mexico and hawaii. W075 is at 75deg west, roughly over NYC.

edit: that's how far west.. the satellites are directly over the equator.
 
justsomeguy said:
Lines of Longitude. W135 is over the Earth in geostationary orbit at 135deg west, over the pacific about halfway between mexico and hawaii. W075 is at 75deg west, roughly over NYC.

edit: that's how far west.. the satellites are directly over the equator.

Does it mean that?

If there are many Protons charges at W135, but there is no Protons charges at W075, does it mean that the plasma is flowing over the region between mexico and hawaii, and will never flow over NYC, since Earth is moving from west to east direction.

On the other hands,
If there are many Protons charges at W075, but there is no Protons charges at W135, does it mean that the plasma is flowing over the region between NYC, and will flow over the region between mexico and hawaii next, since Earth is moving from west to east direction.

Am I on the right track?

Thanks everyone very much for any suggestions
 
The particle detector is seeing things trapped in the magnetic field I think.

The file you linked to is the x-ray detector (not the particle detector), and so (obviously) there is no "flow" since it's just radiation. Differences in the particle detector probably come from the shape of Earth's magnetic field at different times of day due to the solar wind. If that's the case then yes, if you saw high values at 075 I would expect the values to rise at 135 later in the day.. but again, I'm no GOES sensor expert.
 
junk0 said:
Does it mean that?
It means just that. The "G" in GOES stands for geostationary.

Am I on the right track?
No.

The primary purpose of the GOES satellites is to take pictures of the Earth in a number of frequencies. Having the satellites in geostationary orbits means that each is always looking at the same portion the Earth. This is extremely useful for looking down at the Earth. It's not so useful for looking up into space. There are only a few upward-looking instruments on the GOES satellites, and these aren't imagery sensors.

The space weather sensors are amongst these non-imagery, non-earth viewing sensors. Some aren't on all of the GOES satellites. The X ray flux you referenced in the opening post is one of those. Others are replicated, but only one satellite is used as the primary source. The data from the secondary is not used for analysis. It's only there for backup, in case the primary fails.
 
Thanks everyone very much for suggestions
 
Back
Top