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Eric E Palmer edited this page Oct 23, 2026 · 1 revision

Block 12 - Install new PCK/TPC

Description

New planetary constants, or an update RA and DEC of Bennu pole, rotation rate, etc.

Procedure

  • Capture state of system by running RESIDUALS and make a copy somewhere for comparison
  • Update INIT_LITHOS.TXT and make_sumfiles.txt with new PCK/TPC
  • Run MAKE_SUMFILES Option 1 to update the NOMINALS
  • Capture state of system by running RESIDUALS again... did the s/c move the amount you would expect?
  • Make sure the sigmas in NOMINALS are small so that the next step brings the SUMFILES close to the NOMIALS (if the s/c didn't move much in the previous step you can probably skip this step and the next)
  • GEOMETRY 20-15-n-n
  • Run DYNAMICS to set the sigmas to their proper value
  • Run GEOMETRY 20-15-n-n again
  • Iterate

(Compiled by JW)

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