Text this

Number:

Provider:

CAPTCHA:

  ______    _____              __   __    ______  
 /_____//  |  ___||     ___    \ \\/ //  /_   _// 
 `____ `   | ||__      /   ||   \ ` //     | ||   
 /___//    | ||__     | [] ||    | ||     _| ||   
 `__ `     |_____||    \__ ||    |_||    /__//    
 /_//      `-----`      -|_||    `-`'    `--`     
 `-`                     `-`

Please enter what you see:

Text this: Ionospheric peak height at the magnetic equator: Comparison between ionosonde measurements and IRI