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Table 2 Ionosonde stations temporal availability

From: Improvements and validation of the IRI UP method under moderate, strong, and severe geomagnetic storms

Year

Number of available ionospheric stations for assimilation

Available ionospheric stations for assimilation

2004

8

Ath, Chi, Dou, ElA, Jul, Pru, Rom, Roq

2005

8

Ath, Chi, Dou, ElA, Jul, Pru, Rom, Roq

2006

7

Ath, Chi, Dou, ElA, Jul, Pru, Rom

2007

8

Ath, Chi, Dou, ElA, Jul, Pru, Rom, Roq

2008

10

Ath, Chi, Dou, ElA, Jul, Mos, Nic, Pru, Rom, Roq

2009

11

Ath, Chi, Dou, ElA, Gib, Jul, Mos, Nic, Pru, Rom, Roq

2010

10

Ath, Chi, Dou, ElA, Jul, Mos, Nic, Pru, Rom, Roq

2011

10

Ath, Chi, Dou, ElA, Jul, Mos, Nic, Pru, Rom, Roq

2012

12

Ath, Chi, Dou, ElA, Gib, Jul, Mos, Nic, Pru, Rom, Roq, War

2013

12

Ath, Chi, Dou, ElA, Gib, Jul, Mos, Nic, Pru, Rom, Roq, War

2014

12

Ath, Chi, Dou, ElA, Gib, Jul, Mos, Nic, Pru, Rom, Roq, War

2015

12

Ath, Chi, Dou, ElA, Gib, Jul, Mos, Nic, Pru, Rom, Roq, War

2016

12

Ath, Chi, Dou, ElA, Gib, Jul, Mos, Nic, Pru, Rom, Roq, War

  1. Ionospheric stations available for data assimilation for each year, from 2004 to 2016