Flight Lab / Flight software & commanding / 08
Lesson 08 of 08 · about 8 min
A pass window is a finite number of command opportunities. Each send, accepted or rejected, uses one. Loss of signal is the window closing. A rejected command can be fixed and sent again only while a send remains.
The contact opens with three sends. HEATER_ON is opcode 0x21, and the duration starts at 0, which flight software rejects. Correct the argument and execute the command while the contact is still open.