Võrguaja protokolli serveri arenduse ja toimivuse analüüs

Käesolev magistritöö kirjeldab lihtsa võrguaja protokolli (NTP) serveri ehitamist monoplaatarvutisse Tartu Observatooriumi aatomikella tarbeks. See selgitab NTP-protokolli terminoloogiat ja on loodud NTP-serveri ja kliendi jaoks. Mõõtmise eesmärgil kirjeldatakse ka seda, kuidas ehitatatakse NTP-klienti, mis genereerib impulssi sekundis, mis põhineb NTP-kellaajale. Selle kasutamise tulemusi võrreldakse NTP plotteri testitulemustega. Seejärel hinnatakse NTP-serveri eksperimentaalset konfiguratsiooni, millele järgneb arutelu võimalike paranduste ja tulevaste projektide üle.This Master thesis describes the process of building a simple network time protocol (NTP) server on a single-board computer for the Atomic clock at Tartu Observatory. It explains the terminology of NTP protocol and set up for the NTP server. It also describes how to build a NTP client which generates pulse per second by its own script for the measurement purposes. This new pulse is synchronized with the NTP timestamp. Results of its use are compared against the test results from NTP plotter. The experimental configuration of the NTP server is then evaluated which is followed by a discussion regarding possible improvements and future projects

Universaalne pööraja kontroller satelliidi jaamade jaoks

This dissertation describes the process of designing simple printed circuit board (PCB), assembly of components and creating a firmware for turning motors with direct current. Development of the universal antenna rotator controller consists of four chronological steps in thesis: 1. The first part is focusing on requirements of the new project. 2. The second part is investigating each interface of the circuit and explains its functionality. 3. The third part is dedicated to assembling of the printed circuit board and building of an enclosure. 4. The last part is writing a firmware for the universal rotator controller (URC)