Mathematics – Logic
Scientific paper
Jan 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002iaf..confe.888c&link_type=abstract
IAF abstracts, 34th COSPAR Scientific Assembly, The Second World Space Congress, held 10-19 October, 2002 in Houston, TX, USA.,
Mathematics
Logic
Scientific paper
SAC-C is an international Earth observing satellite mission conceived as a partnership between CONAE and NASA, but with additional support in instrumentation and satellite development from the Danish DSRI, the Italian ASI, the French CNES and the Brazilian INPE. A Delta II rocket successfully launched it on November 21st, 2000, from Vandenberg AFB, California, USA. SAC-C has been designed primarily to fulfill the requirements of countries with large extension of territory or scarcely populated like Argentina. Its design is a good compromise between resolution and swath width that makes SAC-C an appropriate tool for global and high dynamic phenomena studies. There are ten instruments on board of SAC-C that will perform different studies, the Multispectral Medium Resolution Scanner (MMRS), provided by CONAE, Argentina, will help in the studies about desertification processes evaluation and their evolution in time (i.e., Patagonia, Argentina), to identify and predict agriculture production, to monitor flood areas and to make studies in coastal and fluvial areas. The MMRS will be associated with a High Resolution Technological Camera (HRTC), also provided by CONAE that will permit improvement in the MMRS resolution in the areas where it will be required. A High Sensitivity Technological Camera (HSTC) is also included in the mission. SAC-C also carries instruments to monitor the condition and dynamics of the terrestrial and marine biosphere and environment (GPS OccuLtation and Passive reflection Experiment (GOLPE)) from NASA/JPL. The Magnetic Mapping Payload, (MMP) developed by the Danish Space Research Institute helps to better understand the Earth's magnetic field and related Sun -Earth interactions .Italian Star Tracker (IST) and Italian Navigation Experiment (INES) developed by the Italian Space Agency, constitute a technological payload that will permit testing a fully autonomous system for attitude and orbit determination. Influence of space radiation on advanced components (ICARE), provided by CNES will permit improvement of risk estimation models for radiation effect on last generation integrated circuit technology. . On June 14th, 2000 CONAE and NASA signed an amendment to the Memorandum of Understanding for the SAC-C mission in order that the SAC-C satellite, were included in a constellation - named "Morning Constellation". It is integrated by USA satellites Landsat 7, EO 1, Terra, and Argentine SAC-C that feature on-board instruments from the United States, Argentina, Denmark, Italy, France, and Japan. The four satellite tracks on the Earth's surface are the same, their orbital height being 705 km and their inclination, 98.21 degrees. They cross the Equator at 10:00, 10:01, 10:15, and 10:30 hours, respectively (local time). Satellites comply with the World Wide Reference System. The Constellation has been working since March 2001 as a single mission and several cooperative activities have been undertaken and will be presented in this paper. Several jointly sponsored technical workshops have been held, and also collaborative spacecraft navigation experiments have been made. One of the objectives of the AM Constellation is the collaboration in the case of emergencies, NASA and CONAE agreed to give preference in those situation in the planification of their satellite acquisitions. From all the possible hazardous events, the most important for the country are fire and floods. In relation to fires, CONAE is presently adapting and developing the algorithms for using MODIS data to generate a fire map product. Additionally research on fire detection is carried out using the data from the HSTC camera. In relation to flooding, CONAE works in cooperation to national institutions providing the data and, in some cases, producing flood extent maps. In particular MMRS data is demonstrating to be very effective due to its spectral and radiometric resolutions, and its large swath which is well suited for extended countries like Argentina.
Alonso C.
Ares F.
Colomb Fernando R.
Frulla L.
Hofmann Carolin
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