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Table 1 Dataset used to derive the model. Missions (first column) and their time span (second column)

From: Kalmag: a high spatio-temporal model of the geomagnetic field

Mission

Period

Selection type

\(\#\) data

Night time

\(K_p\)

IMF \(B_z> 0\)

Vector components

Intensity

Observatories

\(1900.0-2019.5\)

\(\times\)

\(K_p < 4^{o}\)

 

\(3\times 74,410\)

 

L.A.M. surveys

\(1900.0-2009.0\)

\(\times\)

\(K_p < 4^{o}\)

 

\(3\times 132,502\)

\(2,106,816\)

Pogo

\(1965.7-1971.4\)

\(\times\)

\(K_p < 2^{o}\)

\(\times\)

 

\(1,405,585\)

MagSat

\(1979.8-1980.4\)

 

\(K_p < 2^{o}\)

\(\times\)

\(3\times 102,459\)

 

Oersted

\(1999.2-2000.5\)

\(\times\)

\(K_p < 2^{o}\)

\(\times\)

\(3\times 152,705\)

 

CHAMP

\(2000.5-2010.7\)

\(\times\)

\(K_p < 2^{o}\)

\(\times\)

\(3\times 6,103,759\)

 

Swarm

\(2013.8-2022.2\)

\(\times\)

\(K_p < 2^{o}\)

\(\times\)

\(3\times 5,843,961\)

 

Total

\(1900-2022.2\)

   

\(3\times 12,409,799\)

\(3,512,401\)

  1. Selection criteria applied the data: night-time (third column), \(K_p\) threshold (fourth column) and positiveness of the z-component of the IMF (fifth column). Number of vector field components (sixth column) and intensity measurements (seventh column)
  2. Percentage of rejected data through the (eighth column)