| Name: | Abhishek R |
| Affiliation: | RAMAN RESEARCH INSTITUTE |
| Conference ID : | ASI2024_788 |
| Title : | A simple Radio Interferometer for characterizing the SKA Low Digital Receivers |
| Authors : | 1. Abhishek R, K.B. Raghavendra, Arasi, Keerthipriya.S, Arul Pandian, Sandhya, Sahana, Madhavi.S, Kamini P.A., Janardhanan, Srinath, Prabu.T, Srivani, B.S.Girish, Shiv Sethi
2. A.A.S.Likhit, Roshan Kumar, Naveen Katta,
3. Krishna Balaji,
4. Arut Keerthi,
5. Deep Bhowmik, |
| Authors Affiliation: | 1. Raman Research Institute, Bangalore 560080
2. Indian institute of Science Education and Research, Bhopal 462066
3. Indian Institute of Technology, Madras 600036
4. Indian Institute of Technology, Roorkee 247667
5. Indian institute of Science, Bangalore 560080 |
| Mode of Presentation: | Oral |
| Abstract Category : | Education, Outreach and Heritage |
| Abstract : | In this study, we present our implementation of radio interferometry using an array of eight log-periodic dipole antennas (LPDA) operating in the frequency range overlapping with Square Kilometer Array (SKA) Low-frequency telescope, i.e. 120-350 MHz. The antennas are configured to form two elements in an east-west orientation at the Gauribidanur Radio Observatory (77.428 E, 13.603 N). The front-end electronics, such as Low Noise Amplifiers and Tubular Receiver, and the back-end electronics, including the Fiber Optics Receiver, were custom-developed in-house at RRI. An initial simple Data Acquisition System (DAS) was developed based on a standard testing measuring instrument, an oscilloscope. Oscilloscope data is captured at high resolution in a burst mode. A web-based user interface is developed for streamlining data collection and quick processing. This interface also enables remote data acquisition and processing via Ethernet. This system has been successfully implemented and operational. In future, we hope to enhance the configuration for multiple elements and use them in SKA TPM Beamforming experiments, which are ongoing in our lab. This interferometer system has been successfully used as a training platform in radio astronomy instrumentation and observation. This talk will give a brief account of the entire receiver chain hardware details, Test results and future plans. |
