Evolution of the CODE GIMs characteristics used in this study.
|Beginning (YYYY-DDD)||End (YYYY-DDD)||Time span (year)||VTEC maps type||Stations||Satellites|
|1995-001||1997-032||2.09||1 map at 12:00 UT||50–86||~24 ?|
|1997-033||1997-054||0.06||Each 2 h (12 maps) + RMS||72–92||24–25|
|1997-055||1998-086||0.09||1 map at 12:00 UT||42–99||24–27|
|1998-087||1998-098||0.03||Each 2 h (12 maps)||76–80||27–27|
|1998-099||2009-275||12.48||Each 2 h (12 maps) + RMS||73–261||25–36|
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