IMF Polarity Predictions: Comparison of real-time ACE IMF polarity data (solid black line) with Wang-Sheeley-Arge model predictions (colored dots). The three sets of predictions (i.e., red, green, and blue dots) are based on data from, respectively, Wilcox (WSO), Mount Wilson (MWO) and SOLIS (NSO) solar observatories. The solid black line is the real-time (9-hour-averaged) ACE IMF values normalized to equal unit value. A positive (negative) polarity indicates that the IMF is directed radially outward (inward) from the Sun to the Earth. Each 9-hour interval of real-time ACE data corresponds to 9 individual (hourly averaged) values when there are no gaps in coverage. If two-thirds of the 9 values have positive (negative) sign, they are assigned a polarity of +1 (-1). If less than two-thirds are of a particular sign, that time interval is assigned a polarity of zero, implying mixed or indeterminate polarity. Source : http://www.swpc.noaa.gov/ws/predimf_3d.html Referring to following image, based on data from Bz, 8 out of 9 numbers are positive polarity, but ACE shows negative polarity, I would like to confirm whether ACE IMF polarity come from data of Bz or not, does anyone have any suggestions? Thanks in advance for any suggestions :> I am so confusing ... :unsure:

Read it all again. It is not confusing, your making it yourself too hard... we do our best to give you the right answers and always your doubting it. So your making it confusing for yourself. Look, it was a forecast MODEL. Models are not 100% accurate and are based on measurements from the past and what we already know about Solar physics. So like ALL models, they can't be 100% accurate. It always gives an INDICATION of what you can expect. If a model was 100% accurate, we wouldn't do predictions of what to expect. Look at the local weather, if the forecast says it will be sunny but you'll see clouds that's all the same!

Jump to content

SpaceWeatherLive.com

Real-time auroral and solar activity

Existing user? Sign In
Sign In

Remember me Not recommended on shared computers

Forgot your password?
Sign Up

SWL menu
- News
- Auroral activity
- Solar activity
- Help
- FAQ
- More
Forums
Gallery
Activity
- All Activity
- Search
- More
Browse
- Guidelines
- Staff
- Online Users
- More
Merchandise
Leaderboard
More
- More

Other

Questions about IMF polarity from ACE?

By oemSpace
September 5, 2013 in Other

Recommended Posts

Guest Terry Tedor

Posted September 12, 2013

- Share

Posted September 12, 2013

I went back and read my reply to your initial question asking when the reconnection events occurred. My reply is indeed, pretty confusing. My sincerest apologies for that, I should have proof read my reply better and made my answer more clearer.

Yes, you are correct.

Once again, my apologies and I hope everything is cleared up now.

Link to comment

Share on other sites

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

×

SWL menu
- Back
- SWL menu
- News
- Auroral activity
- Solar activity
- Help
- FAQ
Forums
Gallery
Activity
- Back
- All Activity
- Search
Browse
- Back
- Browse
- Guidelines
- Staff
- Online Users
Merchandise
Leaderboard

×

Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you also agree to our Terms of Use and our Privacy Policy.

Sign In