The Significance of e-CALLISTO System and Construction of Log Periodic Dipole Antenna (LPDA) and CALLISTO System for Solar Radio Burst Study

摘要

The solar radio burst data by using the e-CALLISTO (Compound Astronomical Low-cost Low-frequency Instrument for Spectroscopy in Transportable Observatory) network is presented. This project is an alternative to support new country that interested in solar astrophysics. Until now, there are 45 sites used the same system over the world. In this system, we are monitor the solar activity in the range of (45- 870 MHz) using a Log Periodic Dipole Antenna (LPDA). The International Space Weather Initiative (ISWI) program was conducting this project in order to observe the solar activities within 24 hours per day and a portable LPDA were designed which suitable with the criteria with boom length size of the antenna. The rod has gain about 7.01 dB and has 19 elements which made up by two (2) aluminums rods. The rod aluminum are built in order to signify different frequencies. The gain of the antenna is very important for preamplifier to amplify the signal of the sun. There are some suggestions on improving design also presented.