• Studying space weather effects using GPS
  
• The space weather
  
• Slide
  
• Coronal mass ejection
  
• Slide
  
• Slide
  
• Effects of Ionosphere
  
• Slide
  
• TEC (ROT) variation for all the satellites in view at Tiurnelveli on 24th Nov. 2001
  
• Ionospheric scintillations recorded at Tirunelveli during a magnetic storm on Nov 24, 2001
  
• Wide Area Augmentation System (WAAS)
  
• Wide Area Augmentation System (WAAS)
  
• GPS accuracy
  
• WAAS 5 x 5 degree worldwide grid
  
• Seismo-ionospheric effect
  
• Seismo-ionospheric effects
  
• Conclusions