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ANALISIS EFEK DOPLER TERHADAP INTEGRASI SIGNAL CONDITIONER S-BAND SISTEM ANTENA AXYOM = DOPLER EFFECT ANALYSIS ON S-BAND SIGNAL CONDITIONER INTEGRATION OF AXYOM ANTENNA SYSTEM
No full textAbstrak Sistem antena stasiun bumi Rumpin dilengkapi dengan signal conditioner. Integrasi signal conditioner pada sistem antena Rumpin dapat berfungsi sebagai filter sinyal (band pass filter) yang akan masuk ke ACU (antenna control unit) juga berfungsi untuk menguatkan sinyal output dari ACU yang akan diteruskan ke receiver. Penelitian ini bertujuan untuk mengetahui bagaimana pengaruh efek Doppler terhadap integrasi signal conditioner dan mengetahui penguatan sinyal input receiver pada sistem antena Rumpin. Langkah langkah penelitian adalah sebagai berikut : pertama dengan melakukan pengukuran band frekuensi 2220 MHz sebelum integrasi signal conditioner, kemudian melakukan pengukuran setelah integrasi signal conditioner. Selanjutnya menganalisis efek Doppler terhadap band frekuensi yang dipakai dan menganalisis penguatan signal pada input receiver. Hasil Pengukuran dan perhitungan Doppler menunjukkan bahwa Doppler maksimum terjadi pada elevasi minimum sebesar 50,2 kHz dan Doppler terendah terjadi pada elevasi maksimum. Doppler maksimum masih dapat diproses dan pada receiver dan instalasi signal conditioner tidak mengakibatkan terganggunya penerimaan data satelit. Abstract Antenna system of Rumpin ground station is equipped with signal conditioner. Integration of signal conditioner in Rumpin antenna system serves as a filter signal (band pass filter) that will enter ACU (antenna control Unit) also function to strengthen output signal from ACU which will be forwarded to receiver. This study aims to find out how the Doppler effect on integration of signal conditioner and know the amplitude of input signal receiver in Rumpin antenna system. The research steps are as follows: firstly by measuring 2220 MHz frequency band before integration of signal conditioner, than taking measurements after signal signal integration. Analyze the Doppler effect on the frequency band used and analyze signal strengthening on the receiver input. The Doppler Measurement and Calculation results show that the maximum Doppler occurs at minimum elevation of 50.2 kHz and the lowest Doppler occurs at the maximum elevation. The maximum Doppler can still be processed on the receiver and signal conditioner installation does not effect to receiving satellite data.Hlm. 42-147:Il. ;29,7 Cm
PEMANFAATAN MUATAN KAMERA DIGITAL PADA SATELIT LAPAN A2 UNTUK PEMANTAUAN PEMBANGUNAN RUAS JALAN TOL DI PULAU JAWA = UTILIZATION OF DIGITAL CAMERA PAYLOAD ON LAPAN A2 SATELLITE FOR MONITORING OF TOLL ROAD CONSTRUCTION IN JAVA ISLAND
No full textAbstrak Satelit LAPAN A2 adalah satelit mikro dengan salah satu misinya sebagai satelit pemantau bumi. Guna mendukung misi tersebut satelit ini dibekali dengan muatan kamera video dan kamera digital. Salah satu obyek menarik yang bisa dipantau dengan menggunakan satelit adalah progres pembangunan infrastruktur. Dimana dalam makalah ini dikhususkan pada pemantauan progres pembangunan jalan tol dengan menggunakan kamera digital satelit LAPAN A2. Jalan tol merupakan salah satu infrastruktur vital yang berperan dalam menghubungkan satu wilayah dengan wilayah lain. Secara teori kemampuan kamera yang dimiliki oleh satelit LAPAN A2 cukup mampu untuk membedakan obyek seperti jalan tol, apartemen, pemukiman dan infrastruktur lainnya. Meskipun demikian ada beberapa hal yang harus diperhitungkan dalam misi pemantauan dengan menggunakan kamera digital LAPAN A2 khususnya untuk pemantauan obyek di sepanjang pulau Jawa. Abstract LAPAN A2 satellite is a micro satellite with one of its missions as an Earth-surveillance satellite. To support these mission, this satellite is equipped with video and digital camera. One of the interesting objects that can be monitored using satellite is the progress of infrastructure development. Where in this paper is devoted to monitoring progress of toll road development by using digital camera payload from LAPAN A2 satellite. The toll road is one of the vital infrastructures that play a role in connecting one region to another. In theory the camera capabilities possessed by LAPAN A2 satellites are capable enough to distinguish objects such as tolls, apartments, settlements and other infrastructure. Nevertheless there are several things that should be calculated in surveillance missions using LAPAN A2 digital cameras especially for monitoring objects across Java island.Hlm. 242-249: Il.; 29,7 Cm
TENSILE PROPERTIES KOMPOSIT SERAT E-GLASS HASIL VACUUM INFUSION SEBAGAI MATERIAL STRUKTUR LSU (LAPAN SURVEILLANCE UAV) TENSILE PROPERTIES OF VACUUM INFUSION E-GLASS COMPOSITEAS STRUCTURAL MATERIAL OF LSU
No full textHlm. 305-313:Il.; 29,7 Cm
Dampak Hujan Meteor Pada Kemunculan Lapisan E-Sporadis Di Atas Sumedang (The Impact Of Meteor Showers On The Occurrence Of E-Sporadic Layer Over Sumedang)
No full textMeteor showers have been believed as one important source of metalic ion which is accumulated at ~100 km altitude and triggering the emergence of E-Sporadic layer. In this study, meteor showers catalogue derived from the observations in visual and radio windows were used to establish a model and temporal map of annual meteor showers expected to be observed in Sumedang, West Java. The map was compared to ionospheric observation data acquired in Sumedang throughout 2014-2015 in order to understand the relation between the showers of various fluxes to the occurrence of E-Sporadic layer. The analysis revealed that several meteor showers with geocentric speed of vG 50 km/s impact insignificantly. However, the seasonal variation of the percentage of E-Sporadic occurrence is far more dominant compared to its fluctuation during meteor showersHal. 71-8
