DK3WN SatBlog

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Decay



Low Earth orbiting satellites experience orbital decay and have physical lifetimes determined almost entirely by their interaction with the atmosphere. The drag force that such a satellite experiences is due to its interaction with the few air molecules that are present at these altitudes. The density of the atmosphere at LEO heights is controlled by solar X-ray flux and particle precipitation from the magnetosphere and so varies with the current space weather conditions.

last update: 2017-04-24 05:46:40.770 UTC
10.8 cm flux = 84.000000

date             satellite   norad   epoch          decay
2017-05-03  ==>  MINXSS-1    41474   17112.678086   17123.133384
2017-07-05  ==>  NODES-2     41477   17112.894887   17186.115332
2017-07-05  ==>  NODES-1     41478   17112.731230   17186.614910
2017-09-24  ==>  STARS-CM    41895   17112.812002   17267.893572
2017-09-24  ==>  STARS-CD    41895   17112.812002   17267.893572
2017-12-15  ==>  VELOX-III   41935   17112.934258   17349.361272
2018-01-12  ==>  ITF-2       41932   17112.935470   18012.728156
2019-02-20  ==>  BRICSAT     40655   17111.302924   19051.247309
2019-10-07  ==>  INS1B       41950   17112.890887   19280.974513

 
calculations based on SatEvo