Laser local heating system for thermal vacuum testing of spacecraft

Cryostat System for Spacecraft Materials Testing

Local heating realization by reverse thermal cloak

Transformation thermodynamics, as one of the important branches among the extensions of transformation optics, has attracted plentiful attentions and interests recently. The result of transformation thermodynamics, or called as "thermal cloak", can realize isothermal region and hide objects from heat. In this paper, we presented the concept of "reverse thermal cloak" to correspond to the therma...

Flats: Sbc Data from Thermal Vacuum Testing

The Advanced Camera for Surveys (ACS) has three detectors: a large and a small format CCD (WFC and HRC), and a 1024x1024 MAMA Solar Blind Channel (SBC). During the Thermal Vacuum testing at GSFC in 1999 March, flats with S/N=100 per pixel were obtained for the six SBC filters and two prisms. The pixel-to-pixel P-flats are independent of wavelength to <1%. Because of a temperature dependence in ...

WFC3 Thermal Vacuum Testing: UVIS Crosstalk

The integrated WFC3 instrument recently underwent testing under thermal vacuum (TV) conditions in the GSFC SES (Goddard Space Flight Center Space Environment Simulator). This report summarizes the behavior of the UVIS channel crosstalk features seen in the TV data as compared to the behavior seen in previous data taken under ambient conditions in early 2004 and provides an update on the hardwar...

Improved thermal-vacuum compatible flat plate radiometric source for system-level testing of optical sensors

In this work, we describe an improved thermal-vacuum compatible flat plate radiometric source which has been developed and utilized for the characterization and calibration of remote optical sensors. This source is unique in that it can be used in situ, in both ambient and thermal-vacuum environments, allowing it to follow the sensor throughout its testing cycle. The performance of the original...