scholarly journals SPACE SIMULATION OF THE CHINA-BRAZIL EARTH RESOURCES SATELLITE – CBERS

2004 ◽  
Vol 3 (2) ◽  
Author(s):  
E. C. Garcia ◽  
M. B. Dos Santos ◽  
J. S. De Almeida ◽  
D. L. Panissi
Keyword(s):  
Heat Sink ◽  
Vacuum Chamber ◽  
Thermal Vacuum ◽  
Operational Conditions ◽  
Cold Plates ◽  
Vacuum Test ◽  
Proper Operation ◽  
Flight Model ◽  
Simulation Chamber

Space Simulation Tests are performed in spacecraft in order to verify equipment proper operation under thermal vacuum conditioning and to verify the correct workmanship in the assembling of the flight spacecraft as a whole. This paper presents the space simulation (thermal vacuum test) developed in the China Brazil Earth Resources Satellite, Flight Model no. 2, that took place at the Integration and Tests Laboratory – LIT, INPE. Measuring approximately 1.8 x 2.0 x 2.2m, weighting 1,500 kg and carrying three cameras as the main payload, this spacecraft is scheduled to be launched in China. The spacecraft was installed in the 3x3m space simulation chamber and the tests run 24 hours a day completing a total of 350 hours. Using the technique of skin-heaters complemented by the thermal vacuum chamber thermally conditioned shrouds and cold plates, dedicated heat inputs and heat sink where applied at the spacecraft surfaces in order to obtain the required high and low acceptance values of temperature and, subsequently, simulating the operational conditions for the necessary electronic subsystems functioning tests of the spacecraft. This test campaign included teams from both China and Brazil, summing a total of 67 people directly involved.

scholarly journals SPACE SIMULATION OF THE CHINA-BRAZIL EARTH RESOURCES SATELLITE – CBERS

2004 ◽  
Vol 3 (2) ◽  
pp. 96
Author(s):  
E. C. Garcia ◽  
M. B. Dos Santos ◽  
J. S. De Almeida ◽  
D. L. Panissi
Keyword(s):  
Heat Sink ◽  
Vacuum Chamber ◽  
Thermal Vacuum ◽  
Cold Plates ◽  
Vacuum Test ◽  
Simulation Chamber

Space Simulation Tests are performed in spacecraft in order to verify equipment proper operation under thermal vacuum conditioning and to verify the correct workmanship in the assembling of the flight spacecraft as a whole. This paper presents the space simulation (thermal vacuum test) developed in the China Brazil Earth Resources Satellite, Flight Model no. 2, that took place at the Integration and Tests Laboratory – LIT, INPE. Measuring approximately 1.8 x 2.0 x 2.2m, weighting 1,500 kg and carrying three cameras as the main payload, this spacecraft is scheduled to be launched in China. The spacecraft was installed in the 3x3m space simulation chamber and the tests run 24 hours a day completing a total of 350 hours. Using the technique of skin-heaters complemented by the thermal vacuum chamber thermally conditioned shrouds and cold plates, dedicated heat inputs and heat sink where applied at the spacecraft surfaces in order to obtain the required high and low acceptance values of temperature and, subsequently, simulating the operational conditions for the necessary electronic subsystems functioning tests of the spacecraft. This test campaign included teams from both China and Brazil, summing a total of 67 people directly involved.

scholarly journals VERIFICATION OF THE SENTINEL-4 FOCAL PLANE SUBSYSTEM

2017 ◽  
Vol XLII-1/W1 ◽  
pp. 567-573 ◽  
Author(s):  
C. Williges ◽  
R. Hohn ◽  
H. Rossmann ◽  
S. Hilbert ◽  
M. Uhlig ◽  
...  
Keyword(s):  
Focal Plane ◽  
Vacuum Chamber ◽  
Integrating Sphere ◽  
Atmospheric Conditions ◽  
Thermal Vacuum ◽  
Camera System ◽  
Set Up ◽  
German Aerospace ◽  
Flight Model ◽  
Reference Detector

The Sentinel-4 payload is a multi-spectral camera system which is designed to monitor atmospheric conditions over Europe. The German Aerospace Center (DLR) in Berlin, Germany conducted the verification campaign of the Focal Plane Subsystem (FPS) on behalf of Airbus Defense and Space GmbH, Ottobrunn, Germany. The FPS consists, inter alia, of two Focal Plane Assemblies (FPAs), one for the UV-VIS spectral range (305 nm … 500 nm), the second for NIR (750 nm … 775 nm). In this publication, we will present in detail the opto-mechanical laboratory set-up of the verification campaign of the Sentinel-4 Qualification Model (QM) which will also be used for the upcoming Flight Model (FM) verification. The test campaign consists mainly of radiometric tests performed with an integrating sphere as homogenous light source.<br><br> The FPAs have mainly to be operated at 215 K ± 5 K, making it necessary to exploit a thermal vacuum chamber (TVC) for the test accomplishment. This publication focuses on the challenge to remotely illuminate both Sentinel-4 detectors as well as a reference detector homogeneously over a distance of approximately 1 m from outside the TVC. Furthermore selected test analyses and results will be presented, showing that the Sentinel-4 FPS meets specifications.

Thermal-Vacuum Test Data For Jem/Maxi Loop Heat Pipe System With Two Radiators

2008 ◽  
Author(s):  
Shiro Ueno ◽  
Dmitry Khrustalev ◽  
Peter Cologer ◽  
Russ Snyder
Keyword(s):  
Heat Pipe ◽  
Test Data ◽  
Loop Heat Pipe ◽  
Thermal Vacuum ◽  
Pipe System ◽  
Vacuum Test

scholarly journals Ultralight Fabric Reflux Tube (UFRT) Thermal/Vacuum Test

1996 ◽  
Author(s):  
K. Miller Hurlbert ◽  
M. K. Ewert ◽  
J. Graf ◽  
J. Keller ◽  
K. A. Pauley
Keyword(s):  
Thermal Vacuum ◽  
Vacuum Test

scholarly journals Thermal Vacuum Test of Kaistsat-4 Qm

2003 ◽  
Vol 31 (1) ◽  
pp. 120-124 ◽  
Author(s):  
Do-Hyeong Kim ◽  
Yeon-Hwang Jeong ◽  
Gyeong-Mo Tak ◽  
Jun-Ho Lee ◽  
Won-Ho Cha ◽  
...  
Keyword(s):  
Thermal Vacuum ◽  
Vacuum Test

The PLATO mission: Overview and status

2021 ◽  
Author(s):  
Heike Rauer ◽  
Isabella Pagano ◽  
Miguel Mas-Hesse ◽  
Conny Aerts ◽  
Magali Deleuil ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Wide Field ◽  
Operational Conditions ◽  
Ground Segment ◽  
Wide Field Of View ◽  
The Status ◽  
Photometric Monitoring ◽  
Host Stars ◽  
Flight Model ◽  
Made In

&lt;p&gt;PLATO is an ESA mission dedicated to the study of exoplanets and stars, with a planned launch date in 2026. By performing photometric monitoring of about 250 000 bright stars (m&lt;sub&gt;V&lt;/sub&gt; &lt; 13), PLATO will be able to discover and characterise hundreds of exoplanets, including small planets orbiting up to the habitable zone of solar-like stars. PLATO&amp;#8217;s precision will also allow for a precise characterisation of the host stars through asteroseismology. These objectives require both a wide field of view and high sensitivity, which are achieved with a payload comprising 24 cameras with partially overlapping fields of view. They are complemented by 2 more cameras optimised for brighter stars that will also be used as fine guidance sensor. The PLATO development phase started after the mission adoption in July 2017. The Mission Preliminary Design Review (PDR) was declared successful in October 2020. The implementation and delivery to ESA of the flight model CCDs for all cameras (4 CCDs per camera) has been completed. Currently the Structural Thermal Model (STM) of the payload optical bench is being manufactured, while the STM of a single camera has already been successfully tested. In parallel, a first engineering model of a complete, fully functional camera is being integrated, to verify its performance under operational conditions, and the qualification models of the different payload units are being built.&lt;/p&gt; &lt;p&gt;We will present the status of the PLATO payload implementation in the context of the satellite development. In particular, we will describe the payload manufacturing, integration, and tests that will be reviewed at the Critical Milestone in the second half of 2021. We will also summarise the progress made in the science preparation activities, as well as on the ground segment.&lt;/p&gt;

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