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CBERS 2 Launching

The second satellite developed jointly with China was launched successfully on Oct.21, 2003 from the Taiyuan Satellite Launch Center in China. The launch time was 11:16AM (Beijing local time), which corresponds to 1:16AM (Brasilia local time).

CBERS-2 is technically identical to CBERS-1.

Assembly, integration and tests of cbers-fm2: Brazilian stage

Assembly, integration and tests (AIT) of the second flight model of CBERS Program began in Aug. 13, 2000, when the first lot of Chinese equipment arrived in Brazil.

This activity was realized by a team of Chinese and Brazilian specialists, during 14 months, as programmed, at INPE´s AIT Laboratory(LIT - www.lit.inpe.br). After the conclusion of these activities, the satellite and the ground support equipments are sent to China at the end of 2001 to execute the acoustic tests and to prepare for the launch campaign.

The cooperation agreement signed in 1988 slated the AIT of three CBERS models(EQM, FM1 and FM2) in China. Later on, this agreement was reviewed, and in 1993 a complementary protocol was signed, slating the CBERS-FM2 AIT activities in INPE´s installation.

In order to adequately perform these activities, the AIT laboratory expanded and improved its installations, including: reduction of the humidity level in the clean rooms, in order to satisfy the requisites of the Chinese optical payloads; improvements in the rolling bridge of the environmental tests area; installation of new measurement means for mass properties of larger capacity; of a soldering laboratory for space qualified tubes, of magnetic measurement devices, of a new system for vibration data acquisition and treatment ; design and construction of several mechanical support equipments and containers.

The main AIT activities for CBERS-FM2 were:

a) Preparation of the main structure, including mounting of the primary references for optical alignment of the primary structure and of the reaction wheels supports, preliminary structure mounting and verification of the alignment of the primary structure with respect to the primary references;

b) Propulsion system assembly, with the following activities: mounting of the propellant tanks in its support; soldering of titanium tubes; mounting of the tank support on the primary structure; local and global leakage tests; thermal protection mounting;

c) Acceptance of equipment for integration in the satellite, with the following activities: reception, functional tests, control of organic contamination;

d) Other activities like: mechanical equipment, cable and thermal protection mounting, Electrical integration, functional tests, mechanical mounting of modules, interference and electromagnetic compatibility tests, mass properties measurements, vibration tests, solar panel opening tests, thermo-vacuum tests, magnetic measurements.

After conclusion and acceptance of the AIT activities in Brazil, the satellite was prepared for transportation, together with its flight spares and the electrical test support equipment. The satellite trip was aboard a cargo plane, specially rented, from São José dos Campos to Beijing, in Oct.14,2001. After the arrival in China, in order to prove that the trip did not damage the satellite, inspection and tests were performed.

The AIT activities began again in China in the beginning of 2002, aiming to complete the environmental tests which could not be realized in Brazil because at that time LIT´s reverberant chamber was still under construction. Nowadays, all the infrastructure at LIT is fully operational.
Realization
Image Catalog
Brasília (DF)
Images CBERS-2 - Camera CCD
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