DESAIN DAN IMPLEMENTASI GROUND MODEL SATELIT NANO DENGAN SUBSISTEM KOMUNIKASI PADA FREKUENSI S-BAND (DESIGN AND IMPLEMENTATION OF GROUND MODEL NANO-SATELLITE WITH S-BAND FREQUENCY COMMUNICATION SUBSYSTEM)

This paper discusses about the design of the Earth observation ground model nano-satellite which communication subsystem works in S-BAND frequency. This ground model nano-satellite refers to GOLIAT satellite which has the size of 10 x 10 x 10 cm, weighs one kilogram, brings camera as its payload, and has a power emittion of 1 watt. The ground model has a microstrip antenna with the size of 9,5 x 9,5 cm, works in frequency of 2,4 GHz, has the parameter of S 11 -18,506 dB, the VSWR equals to 1,2695, and has gain of 6,42 dB. The ground model was made from Seeduino as an on-board computer, XBee module for communication, VC0706 camera, lithium ion battery, solar cell, and various sensors. The calculation of link budget at 300km distance for the ground model is Effective Isotropic Radiated Power (EIRP) equal to 36,42 dBm, receive power equals to -101,18 dBm, receive power and noise ratio ( equal to 107 dBHz, and energy bit and noise ratio equal to 55,02 dB, while GOLIAT satellite has EIRP of 32,2 dBm, receive power of -82 dBm, receive power and noise ratio of 126,18 dBHz, and energy bit and noise ratio equal to 86,357 dB. Therefore, it could be concluded that the design and implementation of nano-satellite with S-band communication system has been successfully done, moreover, the performance is better than the satellite design used for comparison.  Abstrak: Makalah ini berisi desain dari ground model nano-satelit pengamat Bumi yang subsistem komunikasinya bekerja pada frekuensi S-Band. Ground model yang dibuat mengacu pada satelit GOLIAT yang memiliki ukuran sebesar 10 x 10 x 10 cm, berat satu kilogram, payload yang dibawa berupa kamera, dan daya yang dipancarkan sebesar 1 watt. Ground model satelit nano yang dibuat memiliki antena untuk transmisi berupa antena mikrostrip dengan ukuran 9,5 x 9,5 cm, frekuensi kerja 2,4 GHz, nilai parameter S 11 sebesar -18,506 dB, VSWR sebesar 1,2695, dan gain sebesar 6,42 dB. Ground model yang dibuat menggunakan Seeeduino sebagai on-board computer, modul XBee untuk berkomunikasi, kamera VC0706, baterai lithium ion, solar panel, dan berbagai macam sensor. Perhitungan link budget pada jarak 300 km untuk ground model satelit nano yang dibuat yaitu Effective Isotropic Radiated Power (EIRP) yang dimilikinya sebesar 36,42 dBm, daya terima -101,18 dBm, receive power dan noise ratio (  sebesar 107 dBHz, dan energy bit dan noise ratio sebesar 55,02 dB, sementara untuk satelit GOLIAT memiliki EIRP sebesar 32,2 dBm, daya terimanya sebesar -82 dBm, receive power dan noise ratio sebesar 126,18 dBHz, dan energy bit dan noise ratio sebesar 86,357 dB. Sehingga dapat disimpulkan bahwa desain dan implementasi ground model satelit nano dengan subsistem komunikasi S-band berhasil dilakukan, bahkan kinerjanya lebih baik dari satelit pembanding.