Speakers
Description
The scope of this presentation will be focused on the thermal design and analysis of two cameras: one is a Near Infrared-Short Wave Infrared camera (NIR-SWIR), and the other is a Visible-Near Infrared (VIS-NIR) camera. These two instruments were built, integrated and will be fully tested at INVAP facilities in Bariloche - Argentina.
These instruments are part of a LEO satellite for an Ocean Colour mission, where INVAP is the prime contractor.
NIR-SWIR and VIS-NIR cameras were divided into two main parts; Optical Box and Calibrator. In addition, the optical boxes were separated into thermal enclosures in order to isolate the electronic zone from the optical zone, since the allowable temperatures and thermal stability requirements differ significantly between these zones. One of the most challenging issues was transferring heat from the optical sensor, which has restrictive mechanical and configuration requirements, to the radiators. In order to achieve this, a thermal strategy was used to transport heat involving thermal straps without affecting the performance of the optical module. Since these thermal devices were not originally qualified for aerospace applications, a qualification campaign was also carried out.
This presentation will be divided in two parts. The first part, will show how the design and analysis, were carried out from the point of view of the Thermal Control Subsystem. In particular, it will focus on how different thermal enclosure with sensitive requirements were handled and on the strategies used to overcome various issues. The second part, will cover thermal hardware integration as well as qualification campaigns. Specifically, several TVAC test have been and will be performed from individual component (including thermal straps) to the entire camera.
