1. STO2 Thermal Desktop Model
Flight Configuration

2. STO2 Thermal Desktop Model
Telescope Assembly

3. STO2 Thermal Desktop Model
Payload Components
Gyros
RF Box
DC EBox
IF Box*
XPV
Cryo Control Box
Cryostat
*Added fins to IF Box

4. STO2 Thermal Desktop Model New IF Box size with radiator fins
Payload Components
New IF Box size with radiator fins
DC EBox
4.8” wide”0.12” thick radiator fin on front and top at mid-plane
Proper IF Box Size

5. 4.8” x 0.12” thick Radiator fin added to IF Box Top/Front
Exceed 50 C Limit
4.8” x 0.12” thick Radiator fin added to IF Box Top/Front

7. 260 W nominal heat load except for 2 hr at 500 W
2 hrs at 500 W
260 W nominal heat load except for 2 hr at 500 W

8. Reflection of Sun off
of radiator causes spike

12. Same thermal design as BOPPS Amps

20. STO2 Pre-flight Temperature Predictions and Margins*
*Exceed 50 C Limit *