adjective satellite (s)

• going directly ahead from one point to another without veering or turning aside(adj.all)

  Example:
  Some people see evolution as an undeviating upward march from simple organisms to the very complex.
  

  Synonym:
  unswerving
  

  source: wordnet30
• used of values and principles; not subject to change; steady(adj.all)

  Example:
  Undeviating loyalty.
  

  source: wordnet30