inputs

• Fixed

  • Land mask
  • a posteriori filter
  • daily climatology

• NRT Observations

  • SSMI (until 20NN, when instrument on DMSP F-15 failed)
  • SSMI-S (from 20NN to present) on F-17 and F-18
  • AMSR-e (20NN to 201NN)
  • AMSR2 (from 201NN to present)
  • SST (used for filtering bogus ice)
  • AVHRR (20NN to present, used for filtering bogus ice)
  • IMS mask (2024? to future -- also used for filtering bogus ice; 20NN to 2024? -- used when area has not been observed for too long to use (mask = 1) climatological ice concentration or zero (mask = 0) ice concentration