Purposes of Thermal control To control the operating temperature environment Sp ft syster Most systems become less reliable when operated outside their design operating environment Propellant freezes Thermal cycling damage Instrument/antenna/camera alignment Instrument requirements for very cold temperatures Example operating temperatures- SMAD Table 11-433 Purposes of Thermal Control • To control the operating temperature environment of spacecraft systems – Most systems become less reliable when operated outside their design operating environment – Propellant freezes – Thermal cycling damage – Instrument/antenna/camera alignment – Instrument requirements for very cold temperatures • Example operating temperatures – SMAD Table 11-43