Optimized Analytical Solution of Platform Panel Radiative Area Dimensioning of Geostationary Communications Satellites: A Practical Approach

Abstract

Determining radiative areas of geostationary satellite are one of the challenging tasks for satellite thermal engineers at the early stage of the project. Radiative areas of geostationary communication satellite for the payload and platform panels are determined based on worst hot case (end-of-life). After calculation of radiative areas, it needs to be optimized according to worst hot and cold scenario at sun acquisition mode, orbit raising mode and geostationary orbit. Authors, in this study, optimized geostationary satellite platform panel. The radiator's dimensions were calculated and then optimized based on sun acquisition mode, orbit raising mode and geostationary orbit. Determining radiative areas of GEO satellite is important task. Radiative areas always are determined based on hot case condition at EOL. On the other hand, these radiative areas needs to be optimized according SAM, ORM, and GEO scenario. Calculated radiative areas both the north panel and the south panel was 1 m 2. Radiative areas were studied at +/-10% m 2. It was seen from the analytical results that the surface temperature of the platform panel areas were between-48.5 o C at 1.1 m 2 of radiative area and 37.7 o C at 0.9 m 2 of radiative area.

Radiator Thermal Sebagai Sistem Penolak Panas Pada Satelit Bentuk Silinder

“…Anvari dkk [7] yang mempelajari radiator termal satelit dengan menganalisis dan memprediksi temperatur satelit menggunakan tiga jenis bahan pelindung radiator, dan memperhatikan kestabilan optical properties bahan pelindung yang digunakan terhadap laju tingkat degradasi termal, biaya produksi yang rendah, dan kemudahan penggunaan aplikasi, maka mereka menggunakan SG121 FD White Paint sebagai radiator sistem termal satelit. Bulut dkk [8] yang melakukan penelitian menghitung luas penampang radiator satelit pada kondisi hot (WHC) dan cold case, (WCC), dan dilakukan dengan cara tiga mode posisi satelit untuk mengetahui luas penampang dan temperatur radiator. Pada studi termal radiator ini, yang menjadi fokus analisis yaitu kelas satelit dengan bentuk silinder menggunakan sistem kontrol termal pasif, sedangkan karakteristik satelit seperti pada Tabel.1.…”