the satellite battery pack is one of the important and vital parts that are required for conducting special design with multiple capabilities. some parameters like the minimum weight, lack of outgassing of parts, avoiding from short- circuit in batteries inside battery pack, the possibility for making series connection in batteries, and prevention from destroying battery pack structure caused b...

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 ...

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...

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...

The excellent thermal insulation performance of vacuum insulation panels (VIPs) make them widely applied in energy conservation fields, especially in buildings engineering. This research work proposes a simple, yet extremely effective, alternative model for prediction of the effective thermal conductivity (ETC.) of VIPs. The ETC. of VIPs is function of the thermal conductivity of the core mater...

The UVIS flight detector (UVIS build 1’) was installed in WFC3 prior to its third and final campaign of thermal vacuum ground testing. We performed testing of the end-to-end system throughput on the UVIS channel, and found that it performs near or better than expectations at most wavelengths. However, the measured throughput is significantly different than that measured for this detector in the...

The photometric accuracy of WFC3’s IR Channel was examined during thermal vacuum testing in September October, 2004. The measured signal levels from various incident flux levels and sample sequences were compared in order to determine the relative accuracy of FPA64. Significant deviations in measured versus expected flux levels were observed at some illumination levels. Introduction The purpose...